User's Manual - Crown Broadcast€¦ · FM30/FM150/FM300 Broadcast Transmitter User's Manual ©2007...
Transcript of User's Manual - Crown Broadcast€¦ · FM30/FM150/FM300 Broadcast Transmitter User's Manual ©2007...
FM30/FM150/FM300 Broadcast Transmitter
User's Manual
©2007 Crown Broadcast, a division of International Radio and Electronics Corporation
25166 Leer Drive, Elkhart, Indiana, 46514-5425 U.S.A. (574) 262-8900
Revision Control Revision Print Date
Initial Release March 2007
Important Notices ©2007, Crown Broadcast, a division of International Radio and Electronics Corporation. Portions of this document were originally copyrighted by Michael P. Axman in 1994. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form by any means without the written permission of International Radio and Electronics, Inc. Printed in U.S.A.
Crown Broadcast attempts to provide information that is accurate, complete, and useful. Should you find inadequacies in the text, please send your comments to the following address:
International Radio and Electronics Corporation P.O. Box 2000
Elkhart, Indiana, 46515-2000 U.S.A.
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Contents Section 1– Getting Acquainted 1-1 1.1 Your Transmitter 1-2 1.2 Applications and Options 1-3 1.2.1 Stand Alone 1-4 1.2.2 Backup 1-4 1.2.3 Booster 1-4 1.2.4 Exciter 1-4 1.2.5 Translator 1-5 1.2.6 Satellator 1-6 1.2.7 Nearcasting 1-6 1.3 Transmitter/Exciter Specifications 1-7 1.4 Receiver Specifications 1-9 1.5 Safety Considerations 1-10 1.5.1 Dangers 1-10 1.5.2 Warnings 1-10 1.5.3 Cautions 1-10 Section 2– Installation 2-1 2.1 Operating Environment 2-2 2.2 Power Connections 2-2 2.2.1 AC Line Voltage Setting 2-2 2.2.2 Fuses 2-5 2.2.3 Battery Power 2-5 2.3 Frequency (Channel) Selection 2-5 2.3.1 Modulation Compensator 2-7 2.4 Receiver Frequency Selection 2-7 2.5 RF Connections 2-10 2.6 Audio Input Connections 2-11 2.7 SCA Input Connections 2-12 2.8 Composite Input Connection 2-12 2.9 Audio Monitor Connections 2-13 2.10 Pre-emphasis Selection 2-13 2.11 Program Input Fault Time-out 2-14 2.12 Remote I/O Connector 2-14
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Section 3-Operation 3-1 3.1 Initial Power-up Procedures 3-2 3.2 Power Switches 3-4 3.2.1 DC Breaker 3-4 3.2.2 Power Switch 3-4 3.2.3 Carrier Switch 3-4 3.3 Front Panel Bar-Dot Displays 3-5 3.3.1 Audio Processor Input 3-5 3.3.2 Highband and Wideband Display 3-5 3.3.3 Modulation Display 3-5 3.4 Input Gain Switches 3-6 3.5 Processing Control 3-6 3.6 Stereo-Mono Switch 3-6 3.7 RF Output Control 3-7 3.8 Digital Multimeter 3-7 3.9 Fault Indicators 3-8 Section 4-Principals of Operation 4-1 4.1 Part Numbering 4-2 4.2 Audio Processor Circuit 4-3 4.3 Stereo Generator Circuit 4-4 4.4 RF Exciter Circuit Board 4-6 4.5 Metering Circuit Board 4-8 4.6 Motherboard 4-9 4.7 Display Circuit Board 4-10 4.8 Voltage Regulator Circuit Board 4-11 4.9 Power Regulator Circuit Board 4-12 4.10 RF Driver/Amplifier (FM30) 4-12 4.11 RF Driver (FM150/FM300) 4-13 4.12 RF Amplifier (FM150/FM300 4-13 4.13 Chassis 4-14 4.14 RF Output Filter & Reflectometer 4-14 4.15 Receiver Circuit Board Option 4-15
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Section 5-Adjustments and Tests 5-1 5.1 Audio Processor Adjustments 5-2 5.1.1 Pre-Emphasis Selection 5-2 5.1.2 Pre-Emphasis Adjustment 5-2 5.2 Stereo Generator Adjustments 5-2 5.2.1 Separation 5-2 5.2.2 Composite Output 5-2 Using a Modulation Monitor 5-3 5.2.3 19kHz Level 5-4 5.2.4 19kHz Phase 5-4 5.3 Frequency Synthesizer Adjustments 5-4 5.3.1 Frequency (Channel) Selection 5-4 5.3.2 Modulation Compensator 5-4 5.3.3 Frequency Measurement and Adjustment 5-4 5.3.4 FSK Balance Control 5-5 5.4 Metering Board Adjustments 5-5 5.4.1 Power Calibrate 5-5 5.4.2 Power Set 5-5 5.4.3 SWR Calibrate 5-5 5.4.4 PA Current Limit 5-6 5.5 Motherboard Adjustments 5-6 5.6 Display Modulation Calibration 5-6 5.7 Voltage Regulator Adjustment 5-6 5.8 Bias Set (RF Power Amplifier) 5-7 5.9 Performance Verification 5-7 5.9.1 Audio Proof of Performance Measurements 5-7 5.9.2 De-Emphasis Input Network 5-7 5.10 Carrier Frequency 5-8 5.11 Output Power 5-8 5.12 RF Bandwidth and RF Harmonics 5-8 5.13 Pilot Frequency 5-8 5.14 Audio Frequency Response 5-9 5.15 Audio Distortion 5-9 5.16 Modulation Percentage 5-9 5.17 FM and AM Noise 5-9 5.18 Stereo Separation 5-9 5.19 Crosstalk 5-9 5.19.1 Main Channel Into Sub 5-10 5.19.2 Sub Channel Into Main 5-10 5.20 38kHz Subcarrier Suppression 5-10 5.21 Additional Checks 5-10
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Section 6-Reference Drawings 6-1 6.1 Views 6-2 6.2 Board Layouts and Schematics 6-4 Section 7-Service and Support 7-1 7.1 Service 7-2 7.2 24-Hour Support 7-2 7.3 Spare Parts 7-2 Transmitter Output Efficiency Appendix-1 Glossary G-1 Index Index-1
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Section 1—Getting Acquainted
This section provides a general description of the FM30, FM150, and FM300 transmitters and introduces you to safety conventions used within this document. Review this material before installing or operating the transmitter.
1-1 Getting Acquainted
1.1 Your Transmitter The FM30, FM150, and FM300 are members of a family of FM stereo broadcast transmitters. Crown transmitters are known for their integration, ease-of-use, and reliability. The integration is most apparent in the standard transmitter configuration which incorporates audio processing, stereo generation, and RF amplification without compromised signal quality. A single Crown transmitter can replace several pieces of equipment in a traditional system. Ease-of-use is apparent in the user-friendly front panel interface and in the installation procedure. Simply select your operating frequency (using 5 external switches), add an audio source, attach an antenna, and connect AC or DC power and you're ready to broadcast. Of course, the FM series of transmitters also feature more sophisticated inputs and monitoring connections if needed. Reliability is a Crown tradition. The first Crown transmitters were designed for rigors of worldwide and potentially portable use. The modular design, quality components, engineering approach, and high production standards ensure stable performance. Remote control and metering of the transmitter are made possible through a built-in I/O port. For more direct monitoring, the front panel includes a digital multimeter display and status indicators. Automatic control circuitry provides protection for high VSWR as well as high current, voltage, and temperature conditions.
This manual describes the FM30, FM150, and FM300 because all three transmitters share common design factors. Specific product differences are noted throughout the manual. In physical appearance, the FM30 differs from the FM150 and FM300 in that it lacks the power amplifier and cooling fan assembly on the back panel.
Illustration 1-1 FM150 Stereo Broadcast Transmitter
1-2 FM30/FM150/FM300 User’s Manual
1.2 Applications and Options Crown transmitters are designed for versatility in applications. They have been used as stand-alone and backup transmitters and in booster, translator, satellator, and nearcast applications. The following discussion describes these applications further. Model numbers describe the configuration of the product (which has to do with its intended purpose) and the RF output power which you can expect. The number portion of each name represents the maximum RF output power. The FM300, for example, can generate up to 300 watts of RF output power. Suffix letters describe the configuration. The FM300T, for example, is the standard or transmitter configuration. Except where specified, this document describes the transmitter configuration. In this configuration, the product includes the following components (functions): • Audio Processor/Stereo Generator • RF Exciter • Metering • Low-Pass filter
Illustration 1–2 Standard (Transmitter) Configuration
1-3 Getting Acquainted
1.2.1 Stand-Alone In the standard configuration, the FM30, FM150, and FM300 are ideal stand-alone transmitters. When you add an audio source (monaural, L/R stereo, or composite signal), an antenna, and AC or DC power, the transmitter becomes a complete FM stereo broadcast station, capable of serving a community. As stand-alone transmitters, Crown units often replace multiple pieces of equipment in a traditional setup (exciter, audio processor, RF amplifier). 1.2.2 Backup In the standard configuration, Crown transmitters are also used in backup applications. Should your primary transmitter become disabled, you can continue to broadcast while repairs take place. In addition, the FM transmitters can replace disabled portions of your existing system including the exciter, audio processor, or amplifier. Transfer switches on each side of the existing and backup transmitters make the change-over possible with minimal downtime. The DC operation option of the FM30, FM150, and FM300 make them attractive backup units for those times when AC power is lost. 1.2.3 Exciter In addition to the standard configuration, the FM30, FM150, and FM300 are available in op-tional configurations to meet a variety of needs. An "E" suffix, as in the FM30E, for example, represents an exciter-only configuration. In this configuration, the audio processor and stereo generator boards are replaced with circuitry to bypass their function. The exciter configurations are the least expensive way to get Crown quality components into your transmission system. You might consider the Crown exciter when other portions of your system are performing satisfactorily and you want to maximize your investment in present equipment.
1-4 FM30/FM150/FM300 User’s Manual
1.2.4 Translator A receiver configuration (FM150R, for example) replaces the audio processor/stereo gen-erator board with a receiver module. This added feature makes the FM30, FM150, and FM300 ideal for translator service in terrestrial-fed networks. These networks represent a popular and effective way to increase your broadcasting coverage. Translators, acting as repeater emitters, are necessary links in this chain of events. Traditionally, network engineers have relied on multiple steps and multiple pieces of equip-ment to accomplish the task. Others have integrated the translator function (receiver and exciter) to feed an amplifier. Crown, on the other hand, starts with an integrated transmitter and adds a solid-state Receiver Module to form the ideal translator.
Illustration 1–3 Crown's Integrated Translator This option enables RF in and RF out on any of Crown’s FM series of transmitters. In addi-tion, the module supplies a composite output to the RF exciter portion of the transmitter. From here, the signal is brought to full power by the built-in power amplifier for retransmis-sion. The Receiver Module has been specifically designed to handle SCA channel output up to 100 kHz for audio and high-speed data. FSK ID programming is built-in to ensure compliance with FCC regulations regarding the on-air identification of translators. Simply specify the call sign of the repeater station when ordering. Should you need to change the location of the translator, replacement FSK chips are available. The Receiver Module option should be ordered at the time of initial transmitter purchase. However, an option kit is available for field converting existing Crown units. In the translator configuration there are differences in the function of the front panel, see Section 3 for a description.
1-5 Getting Acquainted
1.2.5 Satellator One additional option is available for all configurations—an FSK Identifier (FSK IDer). This added feature enables the FM30, FM150, and FM300 to transmit its call sign or operating frequency in a Morse code style. This option is intended for use in satellite-fed networks. Transmitters equipped in this fashion are often known as "satellators." Connect the transmitter to your satellite receiver and the pre-programmed FSK IDer does the rest—shifting the frequency to comply with FCC requirements and in a manner that is unnoticeable to the listener. The FSK IDer module should be ordered at the time you order your transmitter, but is available separately (factory programmed for your installation).
Illustration 1–4 Transmitter with FSK IDer Option
Add the FSK IDer option to the exciter configuration for the most economical satellator (a composite input signal is required).
1.2.6 Nearcasting The output power of an FM30 transmitter can be reduced to a level that could function as a near-cast transmitter. Crown transmitters have been used in this way for language transla-tion, for re-broadcasting the audio of sporting events within a stadium, and for specialized local radio. The FM30 is the only transmitter that is appropriate for this application.
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1.3 Transmitter/Exciter Specifications
Frequency Range 87.9 MHz–107.9 MHz (76 MHz–90 MHz optionally available)
RF Power Output (VSWR 1.7:1 or better) FM30 3-33 Watts adjustable FM150 15-165 Watts adjustable FM300 30-330 Watts adjustable RF Output Impedance 50 Ohms Frequency Stability Meets FCC specifications from 0-50 degrees C Audio Input Impedance 50k Ω bridging, balanced, or 600 Ω Audio Input Level Selectable for –10 dBm to +10 dBm for 75 kHz deviation at 400 Hz Pre-emphasis Selectable for 25, 50, or 75 µsec; or flat Audio Response Conforms to 75 µsec pre-emphasis curve as follows: Complete Transmitter ±0.30 dB (50 Hz–10 kHz) ±1.0 dB (10 kHz–15 kHz) Exciter only ±0.25 dB (50 Hz–15 kHz) Distortion (THD + Noise) Complete Transmitter Less than 0.7% (at 15kHz) Exciter only Less than 0.3% (50Hz-15kHz) Stereo Separation Complete Transmitter Better than –40dB (50Hz-15kHz) Exciter only Better than –40dB (50Hz-15kHz) Crosstalk Main into Sub, better than –40dB Sub into Main, better than –40dB Stereo Pilot 19 kHz ±2 Hz, 9% modulation
1-7 Getting Acquainted
Subcarrier Suppression 50dB below ±75 kHz deviation FM S/N Ratio (FM noise) Complete Transmitter Better than –60dB Exciter only Better than –70dB AM S/N Ratio Asynchronous and synchronous noise better than FCC requirements RF Bandwidth ±120 kHz, better than –35 dB ±240 kHz, better than –45 dB RF Spurious Products Better than –70dB Operating Environment Temperature (0°C to 50°C) Humidity (0 to 80% at 20°C) Maximum Altitude (3,000 Meters; 9834 Feet AC Power 100,120, 220, or 240 volts +10%/- 15%); 50/60Hz FM30 115VA FM150 297VA FM300 550VA DC Power FM30 24-36 volts (36 volts at 3 amps required for full output power) FM150 36-72 volts (48 volts @ 7 amps for full output power) FM300 36-72 volts (72 volts @ 10 amps for full output power)
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Note: We set voltage and ampere requirements to assist you in designing your system. De-pending on your operating frequency, actual requirements for maximum voltage and current readings are 10–15% lower than stated.
Regulatory Type notified FCC parts 73 and 74 Meets FCC, DOC, and CCIR requirements Dimensions 13.5 x 41.9 x 44.5 cm 5.25 x 16.5 x 17.5 inches Weight FM30 10.5 kg (23 lbs) 13.6 kg (30 lbs) shipping weight FM150 11.4 kg (25 lbs) 14.5 kg (32 lbs) shipping weight FM300 16.8 kg (37 lbs) 20.0 kg (44 lbs) shipping weight
1-9 Getting Acquainted
1.4 Receiver Specifications Monaural Sensitivity (demodulated, de-emphasized) 3.5 µ V for signal-to-noise > 50 dB Stereo Sensitivity (19–kHz pilot frequency added) 31 µ V for signal-to-noise > 50 dB Connector Standard type N, 50 Ω Shipping Weight 1 lb 1.5 Safety Considerations Crown Broadcast assumes the responsibility for providing you with a safe product and safety guidelines during its use. “Safety” means protection to all individuals who install, operate, and service the transmitter as well as protection of the transmitter itself. To promote safety, we use standard hazard alert labeling on the product and in this manual. Follow the associated guidelines to avoid potential hazard. 1.5.1 Dangers DANGER represents the most severe hazard alert. Extreme bodily harm or death will occur if DANGER guidelines are not followed. 1.5.2 Warnings WARNING represents hazards which could result in severe injury or death. 1.5.3 Cautions CAUTION indicates potential personal injury, or equipment or property damage if the asso-ciated guidelines are not followed. Particular cautions in this text also indicate unauthorized radio-frequency operation.
Illustration 1–5 Sample Hazard Alert
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Section 2—Installation
This section provides important guidelines for installing your transmitter. Review this information carefully for proper installation.
2-1 Installation
2.1 Operating Environment You can install the FM transmitter in a standard component rack or on a suitable surface such as a bench or desk. In any case, the area should be as clean and well ventilated as possible. Always allow for at least 2 cm of clearance under the unit for ventilation. If you set the transmitter on a flat surface, install spacers on the bottom cover plate. If you install the transmitter in a rack, provide adequate clearance above and below. Do not locate the trans-mitter directly above a hot piece of equipment. 2.2 Power Connections The FM30, FM150, and FM300 operate on 100, 120, 220, or 240 volts AC (50 or 60 Hz; sin-gle phase). Each transmitter can operate on DC power as well (28 volts for the FM30, 48 volts for the FM150, and 72 volts for the FM300). The transmitter can operate on fewer volts DC, but with reduced RF output power (see section 1.3). In addition, the transmitter isolates the AC and DC sources; both can be connected at the same time to provide battery backup in the event of an AC power failure. 2.2.1 AC Line Voltage Setting To change the voltage setting, follow these steps: 1. Disconnect the power cord if it is attached. 2. Open the cover of the power connector assembly using a small, flat blade screw
driver. See Illustration 2–1. 3. Insert the screwdriver into the voltage selection slot and remove the drum from the as-
sembly. 4. Rotate the drum to select the desired voltage. See Illustration 2–2. 5. Replace the drum and cover and check to see that the correct voltage appears in the
connector window. 6. Connect the AC power cord.
2-2 FM30/FM150/FM300 User’s Manual
Illustration 2–1 Removing the Power Connector Cover
Illustration 2–2 Selecting an AC Line Voltage
2-3 Installation
2.2.2 Fuses The fuse holders are located in the power connector assembly just below the voltage selec-tor.
Illustration 2–3 Fuse Holder
For 100 to 120 VAC operation, use the fuse installed at the factory. For 220 to 240 VAC op-eration, use the slow-blow fuse located in a hardware kit within the transmitter packaging. Consult the following table:
Transmitter Input Power Fuse
FM30 100–120 V 3 A 220–240 V 1.5 A
FM150 100–120 V 6.3 A 220–240 V 4 A
FM300 100–120 V 12.5 A 220–240 V 6.3 A Illustration 2–4 Fuse Reference Table
2-4 FM30/FM150/FM300 User’s Manual
2.2.3 Battery Power Your transmitter can operate on a DC power source (such as 4 or 5, 12–volt deep cycle bat-teries connected in series). The FM30 requires 28 volts DC for full output power, while the FM150 requires 48 volts, and FM300 requires 72 volts for full output power. Connect the batteries to the red (+) and black (–) battery input binding posts on the rear panel. 2.3 Frequency (Channel) Selection Your transmitter is capable of operating between 87.9 and 107.9 MHz in the FM band. The transmitter can also operate between 76 and 90 MHz by shorting pins 9 and 10 of J20 on the motherboard. (See illustration 2-6) To adjust the operating frequency, follow these steps: 1. Locate the frequency selector switches on the front panel which will be used to change
the setting. See Illustrations 2–6 and 2–7.
2–5 Illustration DC Input Terminals
2-5 Installation
2. Use small flat blade screwdriver or another suitable device to rotate the switches to the desired setting. (The selected number will appear directly above the white indicator dot on each switch.) See examples of selected frequencies in the illustration below.
3. To change the operating band from 87.9-107.9MHz to 76-90MHz or vice versa, or to ad-
just the modulation compensation pot, remove the top cover to gain access to these fea-tures. See illustrations 2-6 and 2-10.
Illustration 2–6 Top Cover Removed
Megahertz .1
Illustration 2–7 Transmitter Front Panel (Frequency Selector Switches)
= 88.10 MHz
= 107.90 MHz
Illustration 2–8 Two Sample Frequency Selections
2-6 FM30/FM150/FM300 User’s Manual
.01
2.3.1 Modulation Compensator The Modulation trim-potentiometer (see illustration 2–10) compensates for slight variations in deviation sensitivity with frequency. Set the trim-pot dial according to the following graph:
Modulation Compensation Pot Setting
Illustration 2–9 Modulation Compensator Settings These compensator settings are approximate. Each mark on the potentiometer represents about 1.8% modulation compensation.
Illustration 2–10 Modulation Compensator Pot
2-7 Installation
Frequency of Operation (MHz)
108 0 106 10 104 15 102 25 100 35 98 40
97.1 45 96 55 94 60 92 70 90 75 88 80 86 80 84 80
82.4 70 82 65 80 55 78 30 76 0
2.4 Receiver Frequency Selection If you have a transmitter equipped with the receiver option, you will need to set the receiving or incoming frequency. 1. With the top cover removed, locate the receiver module and the two switches (labeled
SW1 and SW2).
Illustration 2–11 Receiver Module Switches
2. Use the adjacent chart to set the switches for the desired incoming frequency. 3. For frequencies in the Japan FM band, short pins 7&8 on J1 on the receiver card. 4. For 75us pre-emphasis short pins 3&4 and 5&6 on J2 of the Receiver card. 5. For 50us pre-emphasis short pins 1&2 and 7&8 on J2 of the Receiver card. 6. After setting the frequency, replace the top cover and screws.
2-8 FM30/FM150/FM300 User’s Manual
Freq. 74-90 MHz
Freq. 88-108 MHz
SW1 SW2 Freq. 74-90 MHz
Freq. 88-108 MHz
SW1 SW2
74.9 87.9 0 0 78.9 91.9 1 4 75.0 88.0 8 0 79.0 92.0 9 4 75.1 88.1 0 1 79.1 92.1 1 5 75.2 88.2 8 1 79.2 92.2 9 5 75.3 88.3 0 2 79.3 92.3 1 6 75.4 88.4 8 2 79.4 92.4 9 6 75.5 88.5 0 3 79.5 92.5 1 7 75.6 88.6 8 3 79.6 92.6 9 7 75.7 88.7 0 4 79.7 92.7 1 8 75.8 88.8 8 4 79.8 92.8 9 8 75.9 88.9 0 5 79.9 92.9 1 9 76.0 89.0 8 5 80.0 93.0 9 9 76.1 89.1 0 6 80.1 93.1 1 A 76.2 89.2 8 6 80.2 93.2 9 A 76.3 89.3 0 7 80.3 93.3 1 B 76.4 89.4 8 7 80.4 93.4 9 B 76.5 89.5 0 8 80.5 93.5 1 C 76.6 89.6 8 8 80.6 93.6 9 C 76.7 89.7 0 9 80.7 93.7 1 D 76.8 89.8 8 9 80.8 93.8 9 D 76.9 89.9 0 A 80.9 93.9 1 E 77.0 90.0 8 A 81.0 94.0 9 E 77.1 90.1 0 B 81.1 94.1 1 F 77.2 90.2 8 B 81.2 94.2 9 F 77.3 90.3 0 C 81.3 94.3 2 0 77.4 90.4 8 C 81.4 94.4 A 0 77.5 90.5 0 D 81.5 94.5 2 1 77.6 90.6 8 D 81.6 94.6 A 1 77.7 90.7 0 E 81.7 94.7 2 2 77.8 90.8 8 E 81.8 94.8 A 2 77.9 90.9 0 F 81.9 94.9 2 3 78.0 91.0 8 F 82.0 95.0 A 3 78.1 91.1 1 0 82.1 95.1 2 4 78.2 91.2 9 0 82.2 95.2 A 4 78.3 91.3 1 1 82.3 95.3 2 5 78.4 91.4 9 1 82.4 95.4 A 5 78.5 91.5 1 2 82.5 95.5 2 6 78.6 91.6 9 2 82.6 95.6 A 6 78.7 91.7 1 3 82.7 95.7 2 7 78.8 91.8 9 3 82.8 95.8 A 7
Illustration 2–12-1 Receiver Frequency Selection (Continued on next page)
2-9 Installation
Freq. 74-90 MHz
Freq. 88-108 MHz
SW1 SW2 Freq. 74-90 MHz
Freq. 88-108 MHz
SW1 SW2
82.9 95.9 2 8 86.6 99.6 B A 83.0 96.0 A 8 86.7 99.7 3 B 83.1 96.1 2 9 86.8 99.8 B B 83.2 96.2 A 9 86.9 99.9 3 C 83.3 96.3 2 A 87.0 100.0 B C 83.4 96.4 A A 87.1 100.1 3 D 83.5 96.5 2 B 87.2 100.2 B D 83.6 96.6 A B 87.3 100.3 3 E 83.7 96.7 2 C 87.4 100.4 B E 83.8 96.8 A C 87.5 100.5 3 F 83.9 96.9 2 D 87.6 100.6 B F 84.0 97.0 A D 87.7 100.7 4 0 84.1 97.1 2 E 87.8 100.8 C 0 84.2 97.2 A E 87.9 100.9 4 1 84.3 97.3 2 F 88.0 101.0 C 1 84.4 97.4 A F 88.1 101.1 4 2 84.5 97.5 3 0 88.2 101.2 C 2 84.6 97.6 B 0 88.3 101.3 4 3 84.7 97.7 3 1 88.4 101.4 C 3 84.8 97.8 B 1 88.5 101.5 4 4 84.9 97.9 3 2 88.6 101.6 C 4 85.0 98.0 B 2 88.7 101.7 4 5 85.1 98.1 3 3 88.8 101.8 C 5 85.2 98.2 B 3 88.9 101.9 4 6 85.3 98.3 3 4 89.0 102.0 C 6 85.4 98.4 B 4 89.1 102.1 4 7 85.5 98.5 3 5 89.2 102.2 C 7 85.6 98.6 B 5 89.3 102.3 4 8 85.7 98.7 3 6 89.4 102.4 C 8 85.8 98.8 B 6 89.5 102.5 4 9 85.9 98.9 3 7 89.6 102.6 C 9 86.0 99.0 B 7 89.7 102.7 4 A 86.1 99.1 3 8 89.8 102.8 C A 86.2 99.2 B 8 89.9 102.9 4 B 86.3 99.3 3 9 90.0 103.0 C B 86.4 99.4 B 9 X 103.1 4 C 86.5 99.5 3 A X 103.2 C C
Illustration 2–12-2 Receiver Frequency Selection (Continued on next page)
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Freq. 74-90 MHz
Freq. 88-108 MHz
SW1 SW2 Freq. 74-90 MHz
Freq. 88-108 MHz
SW1 SW2
X 103.3 4 D X 107.0 D F X 103.4 C D X 107.1 6 0 X 103.5 4 E X 107.2 E 0 X 103.6 C E X 107.3 6 1 X 103.7 4 F X 107.4 E 1 X 103.8 C F X 107.5 6 2 X 103.9 5 0 X 107.6 E 2 X 104.0 D 0 X 107.7 6 3 X 104.1 5 1 X 107.8 E 3 X 104.2 D 1 X 107.9 6 4 X 104.3 5 2 X 108.0 E 4 X 104.4 D 2 X 104.5 5 3 X 104.6 D 3 X 104.7 5 4 X 104.8 D 4 X 104.9 5 5 X 105.0 D 5 X 105.1 5 6 X 105.2 D 6 X 105.3 5 7 X 105.4 D 7 X 105.5 5 8 X 105.6 D 8 X 105.7 5 9 X 105.8 D 9 X 105.9 5 A X 106.0 D A X 106.1 5 B X 106.2 D B X 106.3 5 C X 106.4 D C X 106.5 5 D X 106.6 D D X 106.7 5 E X 106.8 D E X 106.9 5 F
Illustration 2–12-3 Receiver Frequency Selection
2-11 Installation
2.5 RF Connections Connect the RF load, an antenna or the input of an external power amplifier, to the type-N, RF output connector on the rear panel. VSWR should be 1.5:1 or better.
The RF monitor is intended primarily for a modulation monitor connection. Information gained through this connection can supplement that which is available on the transmitter front panel displays. If your transmitter is equipped with the receiver option, connect the incoming RF to the RF IN connector.
Illustration 2–13 RF Connections
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2.6 Audio Input Connections Attach audio inputs to the Left and Right XLR connectors on the rear panel. (The Left channel audio is used on Mono.) Pin 1 of the XLR connector goes to chassis ground. Pins 2 and 3 represent a balanced differential input with an impedance of about 50 kΩ . They may be connected to balanced or unbalanced left and right program sources. The audio input cables should be shielded pairs, whether the source is balanced or unbal-anced. For an unbalanced program source, one line (preferably the one connecting to pin 3) should be grounded to the shield at the source. Audio will then connect to the line going to pin 2.
Illustration 2–14 XLR Audio Input Connectors
By bringing the audio return line back to the program source, the balanced differential input of the transmitter is used to best advantage to minimize noise. This practice is especially helpful if the program lines are fairly long, but is a good practice for any distance. If the program source requires a 600 Ω termination, see the motherboard configuration chart on page 4-9 for the proper configuration of the jumpers.
2-13 Installation
2.7 SCA Input Connections You can connect external SCA generators to the SCA In connectors (BNC-type) on the rear panel. The inputs are intended for the 60 kHz to 99 kHz range, but a lower frequency may be used if the transmitter is operated in Mono mode. (The 23 to 53 kHz band is used for ste-reo transmission.) For 7.5 kHz deviation (10% modulation), input of approximately 3.5–volts (peak-to-peak) is required.
Illustration 2–15 SCA Input Connectors
2.8 Composite Input Connection You may feed composite stereo (or mono audio) directly to the RF exciter bypassing the in-ternal audio processor and stereo generator. To use the Crown transmitter as an RF Exciter only ("E" version or when using the "T" version with composite input), it is necessary to use the Composite Input section of the transmitter. This will feed composite stereo (or mono au-dio) directly to the RF exciter. In the "T" version, this will bypass the internal audio proces-sor and stereo generator. Input sensitivity is approximately 3.5–volt P-P for 75 kHz deviation. 1. Enable the Composite Input by grounding pin 14 of the Remote I/O connector (see Illustration 2–18). 2. Connect the composite signal using the Composite In BNC connector.
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Illustration 2–16 Composite In and Audio Monitor Connections
2.9 Audio Monitor Connections Processed, de-emphasized samples of the left and right audio inputs to the stereo genera-tor are available at the Monitor jacks on the rear panel. The signals are suitable for feeding a studio monitor and for doing audio testing. De-emphasis is normally set for 75 µsec; set to 50 µsec by moving jumpers, HD201 and HD202, on the Audio Processor/Stereo Generator board. 2.10 Pre-emphasis Selection Select the pre-emphasis curve (75 µsec, 50 µsec, 25 µsec, or Flat) by jumpering the appro-priate pins of header HD1 on the Audio Processor/Stereo Generator board. If you change the pre-emphasis, change the de-emphasis jumpers HD201 and HD202 on the Audio Proc-essor/Stereo Generator board to match.
2-15 Installation
2.11 Program Input Fault Time-out You can enable an automatic turn-off of the carrier in the event of program failure. To en-able this option, see illustration 2-18 on page 2-16. The time between program failure and carrier turn-off is set by a jumper (JP1) on the voltage regulator board (see page 6–14 for board location). Jumper pins 1 and 2 (the two pins closest to the edge of the board) for a delay of approximately 30 seconds; pins 3 and 4 for a 2–minute delay; pins 5 and 6 for a 4–minute delay, and pins 7 and 8 for an 8– minute delay. 2.12 Remote I/O Connector Remote control and remote metering of the transmitter is made possible through a 25–pin, D-sub connector on the rear panel. (No connections are required for normal operation.)
Illustration 2–17 Remote I/O Connector
Illustration 2–18 Remote I/O Connector (DB-25 Female)
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Pin Number Function 1. Ground 2. FMV Control 3. Composite Out (sample of stereo generator output) 4. FSK In (Normally high; pull low to shift carrier frequency ap-
proximately 7.5 KHz. Connect to open collector or relay contacts of user-supplied FSK keyer.)
5. /Auto Carrier Off (Pull low to enable automatic turnoff of carrier
with program failure.) 6. Meter Battery (Unregulated DC voltage; 5 VDC=50 VDC) 7. Meter RF Watts (1 VDC = 100 Watts) 8. Meter PA Volts (5 VDC = 50VDC) 9. Remote Raise (A momentary switch, holding this pin low will slowly raise the RF output) 10. Remote Lower (A momentary switch, holding this pin low will slowly lower the RF output) 11. Remote SWR (A buffered metering output with a calculated reading of standing wave ratio in
VDC.) 12. External ALC Control 13. No Connection 14. /Ext. Enable (Pull low to disable the internal stereo generator and enable External Composite
Input.) 15. 38 KHz Out (From stereo generator for power supply synchronization. For transmitter equipped with receiver option, this pin becomes the right audio output for an 8- ohm monitor speaker. 38 KHz is disabled.) 16. ALC 17. /Carrier Off ( Pull low to turn carrier off) 18. Fault Summary ( line goes high if any fault light is activated.) 19. Meter PA Temperature (5 VDC=100 degrees C.) 20. Meter PA Current (1VDC=10 DC Amperes.) 21. Front Panel Voltmeter Input. 22. No Connection. 23. RDS RX 24. RDS TX 25. Ground
2-17 Installation
Notes:
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Section 3—Operation
This section provides general operating parameters of your transmitter and a detailed description of its front panel display.
3-1 Operation
3.1 Initial Power-up Procedures These steps summarize the operating procedures you should use for the initial operation of the transmitter. More detailed information follows.
1. Turn on the DC breaker.
Illustration 3–1 DC Breaker
2. Turn on the main power switch.
Illustration 3–2 Front Panel Power Switch
Main Power Switch
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3. Verify the following:
A. The bottom cooling fan runs continuously. B. The Lock Fault indicator flashes for approximately 5 seconds, then goes off.
4. Set the Input Gain switches for mid-scale wideband gain reduction on an average program level (see section 3.4).
5. Set the Processing control (see section 3.5; normal setting is “50”). 6. Set the Stereo-Mono switch to Stereo (see section 3.6). 7. Turn on the Carrier switch. 8. Check the following parameters on the front panel multimeter:
A. RF Power should be 29–33 watts for the FM30, 145–165 watts for the FM150, and 300–330 watts for the FM300.
B. SWR should be less than 1.1. (A reading greater than 1.25 indicates an antenna
mismatch. C. ALC should be between 4.00 and 6.00 volts. D. PA DC Volts should be 26–30 volts for the FM30, 25–35 volts for the FM150, and
37–52 volts for the FM300. (Varies with antenna match, power, and frequency.) E. PA DC Amperes should be 1.5–2.5 amps for the FM30, 5.5–7.5 amps for the
FM150, and 7.0–9.0 amps for the FM300. (Varies with antenna match, power, and frequency.)
F. PA Temperature should initially read 20–35 degrees C (room temperature). After
one hour the reading should be 35–50 degrees C. G. Supply DC Volts should display a typical reading of 45 V with the carrier on and 50 V
with the carrier off for both the FM30 and FM150 products. For the FM300, the readings should be 65 V with the carrier on and 75 V with carrier off. H. Voltmeter should be reading 0.0.
The remainder of this section describes the functions of the front panel indicators and switches.
3-3 Operation
3.2 Power Switches 3.2.1 DC Breaker The DC breaker, on the rear panel, must be on (up) for transmitter operation, even when using AC power. Electrically, the DC breaker is located immediately after diodes which iso-late the DC and AC power supplies. 3.2.2 Power Switch The main on/off power switch controls both the 120/240 VAC and the DC battery power in-put. 3.2.3 Carrier Switch This switch controls power to the RF amplifiers and supplies a logic high to the voltage regulator board, which enables the supply for the RF driver. In addition, the Carrier Switch controls the operating voltage needed by the switching power regulator. A "Lock Fault" or a low pin 17 (/Carrier Off) on the Remote I/O connector will hold the carrier off. (See section 2.12.)
Illustration 3–3 Front Panel Carrier Switch
Carrier Switch
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3.3 Front Panel Bar-Dot Displays Bar-dot LEDs show audio input levels, wideband and highband audio gain control, and modulation percentage. Resolution for the gain control and modulation displays is increased over a conventional bar-graph display using dither enhancement which modulates the brightness of the LED to give the effect of a fade from dot to dot. (See section 4.7.) 3.3.1 Audio Processor Input Two vertical, moving-dot displays for the left and right channels indicate the relative audio levels, in 3 dB steps, at the input of the audio processor. Under normal operating conditions, the left and right Audio Processor indicators will be active, indicating the relative audio input level after the Input Gain switches. During program pauses, the red Low LED will light. The translator configuration shows relative audio levels from the included receiver. 3.3.2 Highband and Wideband Display During audio processing, the moving-dot displays indicate the amount of gain control for broadband (Wide) and pre-emphasized (High) audio. As long as program material causes activity of the Wideband green indicators, determined by the program source level and Input Gain switches, the transmitter will be fully modulated. (See section 3.4.) The Wideband indicator shows short-term “syllabic-rate” expansion and gain reduction around a long-term (several seconds) average gain set. In the translator configuration, the Wideband indicator also shows relative RF signal strength. Program material and the setting of the Processing control determine the magnitude of the short-term expansion and compression (the rapid left and right movement of the green light). High-frequency program content affects the activity of the Highband indicator. With 75–µsec pre-emphasis, Highband processing begins at about 2 kHz and increases as the audio fre-quency increases. Some programs, especially speech, may show no activity while some music programs may show a great deal of activity. 3.3.3 Modulation Display A 10–segment, vertical peak-and-hold, bar graph displays the peak modulation percentage. A reading of “100” coincides with 75 kHz deviation. The display holds briefly (about 0.1 sec-onds) after the peak. The “Pilot” indicator illuminates when the transmitter is in the stereo mode. To verify the actual (or more precise) modulation percentage, connect a certified modulation monitor to the RF monitor jack on the rear panel.
3-5 Operation
3.4 Input Gain Switches The “+6 dB” and “+12 dB” slide switches set audio input sensitivity according to the following table.
Illustration 3–4 Input Gain Switches Find, experimentally, the combination of Input Gain switch settings that will bring the Wideband gain-reduction indicator to mid scale for “normal” level program material. The audio processor will accommodate a fairly wide range of input levels with no degradation of audio quality. 3.5 Processing Control Two factors contribute to the setting of the Processing control: program material and personal taste. For most program material, a setting in the range of 40 to 70 provides good program density. For the classical music purist, who might prefer preservation of music dynamics over density, 10 to 40 is a good range. The audio will be heavily processed in the 70 to 100 range. If the program source is already well processed, as might be the case with a satellite feed, set the Processing to “0” or “10”. 3.6 Stereo-Mono Switch The Stereo-Mono slide switch selects the transmission mode. In Mono, feed audio only to the left channel. Although right-channel audio will not be heard as audio modulation, it will affect the audio processing.
+10dBm Down Down
+4dBm Up Down
-2dBm Down Up
-8dBm Up Up
Normal Input Sensitivity
Switches +6dB +12dB
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3.7 RF Output Control Set this control for the desired output power level. Preferably, set the power with an external RF wattmeter connected in the coaxial line to the antenna. You may also use the RF power reading on the digital multimeter. The control sets the RF output voltage. Actual RF output power varies as the approximate square of the relative setting of the control. For example, a setting of “50” is approximately 1/4 full power. 3.8 Digital Multimeter The four-digit numeric display in the center of the front panel provides information on trans-mitter operation. Use the “Up” and “down” push-buttons to select one of the following pa-rameters. A green LED indicates the one selected.
Illustration 3–5 Digital Multimeter
RF Power—Actually reads RF voltage squared, so the accuracy can be affected by VSWR (RF voltage-to-current ratio). See section 5.4 for calibration. Requires calibration with the RF reflectometer being used. SWR—Direct reading of the antenna standing-wave ratio (the ratio of the desired load im-pedance, 50 ohms, to actual load). ALC—DC gain control bias used to regulate PA supply voltage. With the PA power supply at full output voltage, ALC will read about 6.0 volts. When the RF output is being regulated by the RF power control circuit, this voltage will be reduced, typically reading 4 to 5.5 volts. The ALC voltage will be reduced during PA DC overcurrent, SWR, or LOCK fault conditions.
3-7 Operation
PA DC Volts—Supply voltage of the RF power amplifier. PA DC Amps—Transistor drain current for the RF power amplifier. PA DC Temperature—Temperature of the RF power amplifier heatsink in degrees C. Supply DC Volts—Unregulated DC voltage at the input of the voltage regulators. For battery operation, this reading is the battery voltage minus a diode drop. Voltmeter—Reads the voltage at a test point located on the front edge of the motherboard. A test lead connected to this point can be used for making voltage measurements in the transmitter. The test point is intended as a servicing aid; an alternative to an external test meter. Remember that the accuracy is only as good as the reference voltage used by the metering circuit. Servicing a fault affected by the reference affects the Voltmeter reading. The metering scale is 0 to 199.9 volts. In the translator configuration, you can read a relative indication of RF signal strength nu-merically in the Voltmeter setting. 3.9 Fault Indicators Faults are indicated by a blinking red light as follows: SWR—Load VSWR exceeds 1.5:1. ALC voltage is reduced to limit the reflected RF power. Lock—Frequency synthesizer phase-lock loop is unlocked. This indicator normally blinks for about five seconds at power turn-on. Whenever this light is blinking, supply voltages will be inhibited for the RF driver stage as well as for the RF power amplifier. Input—The automatic carrier-off circuit is enabled (see sections 2.11 and 2.12) and the ab-sence of a program input signal has exceeded the preset time. (The circuit treats white or pink noise as an absence of a program.) PA DC—Power supply current for the RF power output amplifier is at the preset limit. ALC voltage has been reduced, reducing the PA supply voltage to hold supply current to the pre-set limit. PA Temp—PA heatsink temperature has reached 50° C (122° F) for the FM30 and 80° C (176° F) for the FM150 and FM300. At about 55° C (131°F) for the FM30 or 82°C (180° F) for the FM150 and FM300, ALC volt-age begins to decrease, reducing the PA supply voltage to prevent a further increase in temperature. By 60° C (140° F) for the FM50 and 85° C (185° F) for the FM150 and FM300, the PA will be fully cut off. The heatsink fan (models FM150°and FM300 only) is proportion-ally controlled to hold the heatsink at 35 C (95° F). Above this temperature, the fan runs at full speed.
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Section 4—Principles of Operation
This section discusses the circuit principles upon which the transmitter functions. This information is not needed for day-to-day operation of the transmitter but may be useful for advanced users and service person-nel.
4-1 Principles of Operation
4.1 Part Numbering As this section refers to individual components, you should be familiar with the part number-ing scheme used. The circuit boards and component placement drawings use designators such as “R1”, “R2”, and “C1.” These same designators are used throughout the transmitter on several different circuit boards and component placement drawings. When referencing a particular compo-nent it is necessary to also reference the circuit board that it is associated with.
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4.2 Audio Processor/Stereo Generator Circuit Board The audio board provides the control functions of audio processing-compression, limiting, and expansion, as well as stereo phase-error detection, pre-emphasis and generation of the composite stereo signal. Illustration 6-4 and accompanying schematic may be useful to you during this discussion. The overall schematic for the audio board is divided into two sheets; one each for the proc-essor and stereo generator sections of the board. Reference numbers are for the left channel. Where there is a right-channel counterpart, ref-erence number are in parenthesis.
Illustration 4–1 Audio Processor/Stereo Generator Board
4.2.1 Audio Processor Section Audio input from the XLR connector on the rear panel of the transmitter goes to instrument amplifier, U2 (U8). Two-bit binary data on the +6 dB and +12 dB control lines sets the gain of U2 (U8) to one of four levels in 6-dB steps. Gain of U2 is determined by R5, R6, or R7 (R45, R46, or R47) as selected by analog switch U1. U3 (U9) is a THAT2180 voltage-controlled amplifier with a control-voltage-to-gain constant of 6.1 mV/dB. The 2180 is a current-in/current-out device, so signal voltages at the input and output will be zero. R11 converts the audio voltage at the output of U2 (U8) to current at the input of U3 (U9). U3 (U9) output current is converted to audio voltage by U4A (U10A). U4B (U10B) is a unity-gain inverter. When the positive peaks at the output of U4A (U10A) or U4B (U10B) exceeds the gain-reduction threshold, U15 generates a 0.25 Volts-per-dB DC control bias, producing wide-band gain reduction for U3 (U9). The dB-linear allows a front-panel display of gain control on a linear scale with even distribution of dB.
4-3 Principles of Operation
Q1 (Q2) is a recover/expansion gate with a threshold about 18 dB below the normal pro-gram level. The amount of short-term expansion and time for gain recovery is controlled by the PROCESSING control, located on the front panel display board. (See section 3.5.) Audio components above 15,200 Hz are greatly attenuated by eighth-order switched-capacitor elliptical filter, U5 (U11). The filter cut-off frequency is determined by a 1.52-MHz clock (100 x 15,200 Hz) signal from the stereo generator section of the board. The broad-band signal level at the output of U5 (U11) is about 5 dB below that required for full modula-tion. (With normal program material, the 5 dB of headroom will be filled with pre-emphasized audio.) Pre-emphasis in microseconds is the product of the capacitance of C7 (C17), multiplied by the current-gain of U6 (U12), times the value of R22 (R62). (For description of the device used for U6 (12), see explanation for U3 (U9) above.) For a 75 micro-seconds pre-emphasis, the gain of U6 (U12) will be about 1.11. Selection of the pre-emphasis curve (75 µS, 50 µS, or Flat) is made by moving the jumper on HD1 to the pins designated on the board. Fine adjustment of the pre-emphasis is made with R23 (R63). (See section 5.1.) For high-band processing, the peak output of U7A (U13A) and U7B (U13B) is detected and gain-reduction bias is generated, as with the broadband processor. The high-band process-ing, however, shifts the pre-emphasis curve rather than affecting overall gain. Peak audio voltages are compared to plus and minus 5-volt reference voltages at the outputs of U19A and U19B. This same reference voltage is used in the stereo generator section. A stereo phasing error occurs when left and right inputs are of equal amplitude but opposite polarity. The most common cause is incorrect wiring of a left or right balanced audio line somewhere in the program chain-sometimes at the source of a recording. When this hap-pens, all the audio is in the left-minus-right stereo subcarrier-none in the left-plus-right base-band. The error can go unnoticed by one listening on a stereo receiver, but the audio may disappear on a mono receiver. In normal programming there may be short-term polarity re-versals of left versus right, either incidental or-for effect-intentional. A phase error of several seconds duration is processed by U14A and U14B and interpreted as a real error. During a phasing error the right-channel level is gradually reduced by 6 dB. For a listener to a stereo radio, the right-channel volume will be lower, while on a mono receiver there will be a reduc-tion of volume. NORMAL/TEST switch. In the TEST position, the stage gains are set to a fixed level. See section 6.2 4.2.2 Stereo Generator Section Composite stereo signal is generated from left and right-channel audio inputs. This section also has the amplifier (U201) for an optional external composite input and provision for in-sertion of SCA signal(s).
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Processed, pre-emphasized left and right audio is passed through third-order lowpass filters comprised of U202A (203A) and associated circuitry. The filters decrease the level of audio products below 30 Hz. This low-frequency roll off is necessary to prevent disturbance to the phase-lock loop in the RF frequency synthesizer by extremely low-frequency audio compo-nents. (See caution at section 2.8.) U204 is a precision, four-quadrant, analog multiplier. The output of U204 is the product of 38 kHz applied to the Y input and the difference of left and right audio (L-R signal) applied to the X input. The resulting output is a double sideband, suppressed carrier/the L-R sub-carrier. Spectral purity of the stereo subcarrier is dependant on a pure 38-kHz sinewave at the mul-tiplier input. U207A and Y201 comprise a 7.6-MHz crystal oscillator from which the 19 and 38-kHz sub-carriers are digitally synthesized. U207F is a buffer. The 7.6 MHz is divided by 5 in U208A to provide 1.52 Mhz, used by switched-capacitor filters U5 and U11 in the audio section. 3.8 MHz, 1.9 MHz, and 304 kHz are also derived from dividers in U208. Exclusive-OR gates, U210C and U210D, provide a stepped approximation of a 38-kHz sine wave. With the resistor ratios used, the synthesized sine wave has very little harmonic energy below the 7th harmonic. U210A and B generate the 19-kHz pilot subcarrier. U211 is a dual switched-capacitor filter, configured as second-order, low-pass filters, each one with a Q of 5. The 38 and 19-kHz outputs of pins 1 and 20, respectively, are fairly pure sine waves. Harmonic distortion products are better than 66 dB down-with a THD of less than 0.05%. SEPARATION control R244 sets the 38-kHz level at the Y input of U204. Resistor matrix R219, R220, R221, and R223 sum the L+R audio with the L-R subcarrier to produce a current at the junction of R221 and R223 that will be converted to composite ste-reo (less pilot) at the output of summing amplifier U206A. SCA signal is also injected at the input of U206A. 19-kHz pilot is combined with composite stereo in summing amplifier U206B. Analog switch U205, at the input of U206A, provides switching of left and right audio for ste-reo and mono modes. In the mono mode, right channel audio is disabled, and the left chan-nel audio is increased from 45% modulation to 100%. MON L and MON R outputs go to the AF Monitor jacks on the rear panel. R209+R210 (R214+R215) and C207 (C210) is a de-emphasis network. Processed, de-emphasized samples of the left and right audio are used for a studio monitor and for audio testing. Jumpers at HD201 (HD202) allow selection of 50-µsec or 75-µsec de-emphasis. VR212A and B supply +7 volts and -7 volts, respectively. A 5-volt reference from the audio processor section supplies the subcarrier generators. For an explanation of on-board adjustments see section 5.2.
4-5 Principles of Operation
4.3 RF Exciter Circuit This circuit is also known as the Frequency Synthesizer. The Frequency Synthesizer part of the motherboard is no longer a separate module as was the case on older transmitters.The entire component side of the motherboard is a ground plane. Frequency selector switches located on the front panel of the transmitter establish the operating frequency. The VCO (voltage-controlled oscillator) circuitry is inside an aluminum case. Illustration 6-6 and accompanying schematics can be used as reference in this discussion. VCO1 operates at the synthesizer output frequency of 87 MHz to 108 MHz. The frequency is controlled by a voltage applied to pin 8 of the VCO. A sample of the RF comes from A2 and is fed to the PLL chip U13. U13 is a phase-locked-loop frequency synthesizer IC. The 10.24 MHz from the crystal oscillator is divided to 10 kHz. Internal programmable dividers divide the 87 - 108 MHz RF to 10 kHz. Differences between the two signals produce error signals at pins 7 and 8 of U14.
Illustration 4–2 Motherboard (Exciter Section)
Frequency selector switches are read by shift registers U17 and U18. Data from the shift registers is read by U16 which then programs the PLL (Phase Lock Loop) IC U13. U14B is a differential amplifier and filter for the error signal. Audio that is out of phase with that appearing on the error voltage is introduced by U14A., allowing for greater loop band-width with less degradation of the low frequency audio response. Lock and unlock status signals are available at the outputs of U15E and U15F respectively. Modulation is introduced to the VCO though R72 and R122.
Exciter Section
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4.5 Metering Circuit The ALC and metering circuitry is on the motherboard (see Illustration 6–6). This circuit processes information for the RF and DC metering, and produces ALC (RF level-control) bias. It also provides reference and input voltages for the digital panel meter, voltages for remote metering, fan control, and drive for the front-panel fault indicators. Illustration 6–6 and accompanying schematics complement this discussion. PA voltage and current come from a metering shunt on the power regulator board. The PAI input is a current proportional to PA current; R153 converts the current to voltage used for metering and control. A voltage divider from the PAV line is used for DC voltage metering.
Illustration 4–3 Metering Circuit
U23A, U23B, and U24A, with their respective diodes, are diode linearity correction circuits. Their DC inputs come from diode detectors in the RF reflectometer in the RF low-pass filter compartment. U24B, U24C, are components of a DC squaring circuit. Since the DC output voltage of U24C is proportional to RF voltage squared, it is also proportional to RF power. U22C, U22A, U20A, and U22D are level sensors for RF power, reflected RF power, PA temperature, and external PA current, respectively. When either of these parameters ex-ceeds the limits, the output of U22B will be forced low, reducing the ALC (RF level control) voltage, which, in turn, reduces the PA supply voltage. The DC voltage set point for U22A (reflected RF voltage) is one-fifth that of U22C (forward RF voltage). This ratio corresponds to an SWR of 1.5:1 [(1+.2)/(1– .2)=1.5]. The U25 invert-ers drive the front panel fault indicators.
Metering Section
4-7 Principles of Operation
4.6 Motherboard The motherboard is the large board in the upper chassis interconnecting the audio proces-sor/stereo generator board or the optional receiver module or the Omnia digital audio proc-essor to the RF exciter and metering circuits. The motherboard provides the interconnec-tions for this boards, eliminating the need for a wiring harness, and provides input/output fil-tering. The RF exciter and Metering circuits are an integral part of the motherboard and are no longer separate boards as in past transmitter designs. Also contained on the motherboard is the +5.00 volt reference and the composite drive Op amp and its associated circuitry. The motherboard has configuration jumpers associated with different options that can be added at the time of order or at a later time as an upgrade. The motherboard configuration chart for these jumpers can be found on the following page.
Illustration 4–4 Configuration Jumpers
Configuration Jumpers
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Jumper FMA “E” FMA“T”
50KΩ input FMA“T”
600Ω input FMA “R” FMA
“Omnia” Analog input
FMA “Omnia” AES input
Z1 Short Short Short Short Short Open Z2 Short Short Short Short Short Open Z3 Open Open Short Open Open Open Z4 Open Open Open Open Open Short Z5 Open Open Short Open Open Open Z6 Open Open Open Open Open Short Z7 Open Open Short Open Open Open Z8 Open Open Short Open Open Open Z9 Short Open Open Open Open Open Z10 Short Open Open Open Open Open Z11 Short Open Open Open Open Open Z12 Short Open Open Open Open Open Z13 Short Open Open Open Open Open Z14 Short Open Open Open Open Open Z15 Open Open Open Open Open Open Z16 Open Open Open Open Open Open Z17 Open Open Open Open Open Open Z18 Open Open Open Open Open Open Z19 Open Open Open Open Open Open Z20 Open Open Open Open Open Open Z21 Open Open Open Open Open Open Z22 Open Open Open Open Open Open Z23 Short Short Short Short Short Short Z24 Short Short Short Short Short Short Z25 Short Short Short Short Short Short Z26 Short Short Short Short Short Short Z27 Short Short Short Short Short Short Z28 Short Short Short Short Short Short Z29 Short Short Short Short Short Short Z30 Short Short Short Short Short Short Z31 Open Open Open Open Open Open Z32 Short Open Open Open Open Open Z33 Short Open Short Open Open Open
JMP1 Open Open Open Open Open Open JMP2 Open Open Open Open Open Open
Motherboard Jumper Configuration Chart 4.6.1
4-9 Principles of Operation
4.7 Display Circuit Board The front-panel LEDs, the numeric display, the slide switches, and the processing and RF level controls are mounted on the display circuit board. To access the component side of the board, remove the front panel by removing 12 screws. The board contains circuits for the digital panel meter, modulation peak detector, and LED display drivers, as well as indi-cators and switches mentioned above. Illustration 6–9 and accompanying schematic complement this discussion. Left and right audio from input stages of the audio processor board (just after the Input Gain attenuator) go to the L VU and R VU input on the display board. Peak rectifiers U1A and U1B drive the left and right Audio Input displays. The LED driver gives a 3–dB per step dis-play. The lowest step of the display driver is not used; rather a red LOW indicator lights when audio is below the level of the second step. Transistors Q1 and Q2 divert current from the LOW LEDs when any other LED of the display is lit. Resolution of the linear displays, High Band, Wide Band, and Modulation, has been im-proved using dither enhancement. With dither, the brightness of the LED is controlled by proximity of the input voltage relative to its voltage threshold. The effect is a smooth transi-tion from step to step as input voltage is changed. U6A, U6B, and associated components comprise the dither generator. Dither output is a triangular wave. Composite stereo (or mono) is full-wave detected by diodes D5 and D6, U7, U13, Q3, and Q4 are components of a peak sample-and-hold circuit. Oscillator, U9F, supplies a low-frequency square wave to the Fault indicators, causing them to flash on and off. Digital multimeter inputs are selected with push buttons located to the right of the multimeter menu. Signals from the push buttons are conditioned by U9A and U9B. U10 is an up/down counter. Binary input to U11 from U10 selects a green menu indicator light, and lights the appropriate decimal point on the numeric readout. The binary lines also go to analog data selectors on the ALC/ metering board. Processing control, R50, is part of the audio processor. (See section 4.2.) The DPM IN and DPM REF lines are analog and reference voltage inputs to digital multime-ter IC U12. They originate from analog data selectors on the ALC/ metering board.
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4.8 Voltage Regulator Circuit Board The voltage regulator board is the longer of two boards mounted under the chassis toward the front of the unit. It has switch-mode voltage regulators to provide +12, –12, and 20 volts. It also contains the program detection and automatic carrier control circuits. Illustration 6–10 and accompanying schematic complement this discussion. U3E and U3F convert a 38–kHz sine wave from the stereo generator into a synchronization pulse. In the transmitter, synchronization is not used, thus D9 is omitted. U4 and U5 form a 20–volt switching regulator running at about 35 kHz. U4 is used as a pulse-width modulator; U5 is a high-side driver for MOSFET switch Q1. Supply voltage for the two IC’s (approximately 15.5 volts) comes from linear regulator DZ2/Q5. Bootstrap volt-age, provided by D10 and C14, allows the gate voltage of Q1 to swing about 15 volts above the source when Q1 is turned on. Current through the FET is sensed by R38 and R38A. If the voltage between pin 5 and 6 of U05 exceeds 0.23 volts on a current fault, drive to Q1 is turned off. Turn-off happens cycle by cycle. The speed of the turn-off is set by C13. U6 is a switching regulator for both +12 volts and –12 volts. It runs at about 52 kHz. Energy for –12 volts is taken from inductor L2 during the off portion of the switching cycle. The –12 volts tracks the +12 volts within a few tenths of a volt. There will be no –12 volts until current is drawn from the +12 volts. Q2, Q3, and Q4 form an active filter and switch, supplying DC voltage to the RF driver, when the Carrier switch is on. The program detection circuit is made up of U1 and U2. U1A and U1D and associated cir-cuitry discriminate between normal program material and white noise (such as might be pre-sent from a studio-transmitter link during program failure) or silence. U1A and surrounding components form a band-pass filter with a Q of 3 tuned to about 5 kHz. U1D is a first-order low-pass filter. Red and green LEDs on the board indicate the presence or absence of pro-gram determined by the balance of the detected signals from the two filters. U2 and U1C form a count-down timer. The time between a program fault and shutdown is selected by jumpering pins on header JP1. For times, see section 5.7. The times are proportional to the value of R21 (that is, times can be doubled by doubling the value of R21) and are listed in minutes.
4-11 Principles of Operation
4.9 Power Regulator Circuit Board The power regulator board is the shorter of two boards mounted under the chassis toward the front of the unit. The board has the isolating diode for the battery input, the switch-mode voltage regulator for the RF power amplifier, and circuitry for PA supply current metering. Illustration 6–10 and accompanying schematic complement this discussion. Diode D4, in series with the battery input, together with the AC-supply diode bridge, pro-vides diode OR-ing of the AC and DC supplies. U1 and U2 form a switching regulator running at about 35 kHz. U1 is used as a pulse-width modulator; U2 is a high-side driver for MOSFET switch Q1. Power for the two IC’s comes from the 20–volt supply voltage for the RF driver (available when the Carrier switch is on). The voltage is controlled at 16 volts by zener diode DZ1. Bootstrap voltage provided by D2 and C9 allows the gate voltage of Q1 to swing about 16 volts above the source when Q1 is turned on. Current through the FET is sensed by R12A and R12B. If the voltage from pin 5 to 6 of U2 exceeds 0.23 volts on a current fault, drive to Q1 is turned off. This happens on a cycle-by-cycle basis. The speed of the turnoff is set by C5. U3 and Q2 are used in a circuit to convert the current that flows through metering shunt, R19, into a current source at the collector of Q3. Forty milli-volts is developed across R19 for each amp of supply current (.04 ohms x 1 amp). Q3 is biased by U3 to produce the same voltage across R16. The collector current of Q3 is the same (minus base current) as that flowing through R22 resulting in 40 microamperes per amp of shunt current. R5 on the metering board converts Q3 collector current to 0.1 volt per amp of shunt current (.04 ma X 2.49 k). (See section 5.4.) 4.10 RF Driver/Amplifier (FM30) The RF Driver/Amplifier assembly is mounted on a 100 mm x 100 mm plate in the under side of the chassis. Illustration 6-14 and accompanying schematic complement this discussion. The driver amplifies the approximate 20 milliwatts from the frequency synthesizer to 30 watts. An MHW6342T hybrid, high-gain, wideband amplifier, operating at about 20 volts, provides about one watt of drive to a single BLF246 MOSFET amplifier. The BLF245 stage operates from a supply voltage of 28 volts in the FM30. The circuit board has components for input and output coupling and for power supply filter-ing.
4-12 FM30/FM150/FM300 User’s Manual
4.11 RF Driver (FM150/FM300) The RF Driver assembly is mounted on a 100 mm x 100 mm plate in the under side of the chassis. Illustration 6-14 and accompanying schematic complement this discussion. The driver amplifies the approximate 20 milliwatts from the frequency synthesizer to about 8 watts to drive the RF power amplifier. An MHW6342T hybrid, high-gain, wideband amplifier, operating at about 20 volts, provides about one watt of drive to a single BLF245 MOSFET amplifier. The BLF245 stage operates from a supply voltage of approximately 20 volts. The circuit board provides for input/output coupling and for power supply filtering. 4.12 RF Amplifier (FM150/FM300) The RF power amplifier assembly is mounted on back of the chassis with four screws, lo-cated behind an outer cover plate. Access the connections to the module by removing the bottom cover of the unit. The RF connections to the amplifier are BNC for the input and out-put. Power comes into the module through a 5–pin header connection next to the RF input jack. Illustration 6-12 and accompanying schematic complement this discussion. The amplifier is built around a ST MicroElectronics SD2942, a dual power MOSFET rated for 50 volts DC and a maximum power of about 350 watts. When biased for class B, the transistor has a power gain of about 20 dB. (It is biased below class B in the transmitter.) Input transformer, T11, is made up of two printed circuit boards. The four-turn primary board is separated from the one-turn secondary by a thin dielectric film. R12–R17 are for damp-ing. Trim pot R11 sets the bias. Output transformer, T21, has a one-turn primary on top of the circuit board and a two-turn secondary underneath. Inductors L21 and L22 provide power line filtering.
4-13 Principles of Operation
4.13 Chassis The AC power supply components, as well as the bridge rectifier and main filter capacitor, are mounted on the chassis. Switching in the power-entry module configures the power transformer for 100, 120, 220, or 240 VAC; see section 2.2 for switching and fuse informa-tion. A terminal strip with MOV voltage-surge suppressors and in-rush current limiters is mounted on the chassis between the power entry module and the toroidal power trans-former.
The main energy-storage/filter capacitor, C01, is located between the voltage and power regulator boards. The DC voltage across the capacitor will be 45–55 volts (FM30 and FM150) or 65–70 volts (FM300) when the carrier is on. 4.14 RF Output Filter & Reflectometer The RF low-pass filter/reflectometer are located in the right-hand compartment on the top of the chassis. See Illustration 6–13 and accompanying schematic for more information. A ninth-order, elliptic, low-pass filter attenuates harmonics generated in the power amplifier. The capacitors for the filter are circuit board pads. The reflectometer uses printed circuit board traces for micro-strip transmission lines. Trans-mission line segments (with an impedance of about 82 ohms) on either side of a 50–ohm conductor provide sample voltages representative of the square root of forward and reverse power. DC voltages, representative of forward and reflected power, go through a bulkhead filter board to the motherboard, then to the metering board, where they are processed for power control and metering and for SWR metering and protection.
4-14 FM30/FM150/FM300 User’s Manual
4.15 Receiver Circuit Board Option This option allows the transmitter to be used as a translator. The receiver board receives terrestrially fed RF signal and converts it to composite audio which is then fed into the ex-citer board. Microprocessor controlled phase lock loop technology ensures the received fre-quency will not drift, and multiple IF stages ensure high adjacent channel rejection. Refer to illustrations 4–6, 6–16 and its schematic for the following discussion. The square shaped metal can located on the left side of the receiver board is the tuner module. The incoming RF signal enters through the BNC connector (top left corner) and is tuned through the tuner module. Input attenuation is possible with the jumper labeled “LO” “DX”, on the top left corner of the receiver board. Very strong signals can be attenuated 20 dB automatically by placing the jumper on the left two pins (“LO” position). An additional 20 dB attenuation is also available with the jumpers in the top left corner of the board. The fre-quencies are tuned by setting switches SW1 and SW2 (upper right corner). These two switches are read upon power up (or by momentarily shorting J7) by the microprocessor (U4). The microprocessor then tunes the tuner module to the selected frequency. The fre-quency range is 87.9 Mhz at setting “00” to 107.9 Mhz at setting “64”. Other custom ranges are available. Located in the lower left-hand corner of the Receiver Module is a 3.5mm headphone jack. Demodulated Left and Right audio is present at this jack. A regular pair of 32 ohm stereo headphones, such as the types used with portable audio devices, can be used to monitor the audio on the receiver module.
Illustration 4–5 Receiver Module
Receiver Module
4-15 Principles of Operation
When a stereo signal is present, LED 3 illuminates which indicates that left and right audio is available. Then the stereo signals go to gain stages and out to the RCA jacks on the back of the cabinet. These can be used for off-air monitoring of the audio signal. Incoming fre-quency can be monitored from the frequency monitor BNC jack on the back. The stereo buffer, stereo decoder, and gain stages and have no effect on the signal that goes through the transmitter. The power supply is fairly straight forward. The incoming 12 volt supply goes to a 7809, 9 volt regulator (VR1) which supplies all 9–volt needs on the board. The 9 volts also supplies a 7805, 5 volt regulator (VR2) which supplies all 5–volt needs on the board. Plus and minus 12 volts from the motherboard is filtered and supplies various needs on the board. Finally there is a precision reference voltage. Two 2.5 volt reference shunts act very much like a very accurate zener diode to provide a precision 5 volt supply to the metering board.
4-16 FM30/FM150/FM300 User’s Manual
Section 5—Adjustments and Tests
This section describes procedures for (1) advanced users who may be interested in customizing or optimizing the performance of the transmit-ter and (2) service personnel who want to return the transmitter to op-erational status following a maintenance procedure.
5-1 Adjustments and Tests
5.1 Audio Processor Adjustments 5.1.1 Pre-Emphasis Selection Select the pre-emphasis curve (75 µsec, 50 µsec, 25 µsec, or Flat) by jumpering the appro-priate pins of header HD1 on the audio processor/stereo generator board. (See section 2.9.) If you change the pre-emphasis, change the de-emphasis jumpers, HD201 and HD202 on the audio processor/stereo generator board, to match. (See section 2.8.) 5.1.2 Pre-Emphasis Fine Adjustment Trim potentiometers, R23 and R63, (for left and right channels, respectively) provide for fine adjustment of the pre-emphasis. Set the potentiometers to bring the de-emphasized gain at 10 kHz equal to that of 400 Hz. (At the proper setting, 15.0 kHz will be down about 0.7 dB.) When making these adjustments, it is important that you keep signal levels below the proc-essor gain-control threshold. A preferred method is to use a precision de-emphasis network in front of the audio input. Then, use the non-de-emphasized (flat) output from the FM modulation monitor for meas-urements. 5.2 Stereo Generator Adjustments 5.2.1 Separation Feed a 400–Hz sine wave into one channel for at least 70% modulation. Observe the clas-sic single-channel composite stereo waveform at TP301 on the RF Exciter circuit board. Ad-just the Separation control R244 for a straight centerline. Since proper adjustment of this control coincides with best stereo separation, use an FM monitor to make or confirm the adjustment.
5-2 FM30/FM150/FM300 User’s Manual
5.2.2 Composite Output You can make adjustments to the composite output in the following manner: Using a Modulation Monitor 1. Set the Stereo-Mono switch to Mono. 2. Check that the setting of the Modulation compensation control (see illustration 2–9) on
the RF Exciter circuit , falls within the range specified for the frequency of operation. (See section 2.3.1.)
3. Feed a sine wave signal of about 2.5 kHz into the left channel at a level sufficient to put
the wideband gain-reduction indicator somewhere in the middle of its range. 4. Set the Composite level control to produce 90% modulation as indicated on an FM
monitor. 5. Apply pink noise or program material to the audio inputs and confirm, on both Mono and
Stereo, that modulation peaks are between 95% and 100%. 5.2.3 19–kHz Level Adjust the 19–kHz pilot for 9% modulation as indicated on an FM modulation monitor. (The composite output should be set first, since it follows the 19–kHz Level control.) 5.2.4 19–kHz Phase 1. Apply a 400–Hz audio signal to the left channel for at least 70% modulation. 2. Look at the composite stereo signal at TP301 on the RF Exciter circuit board with an os-
cilloscope, expanding the display to view the 19–kHz component on the horizontal cen-terline.
3. Switch the audio to the right-channel input. When the 19–kHz Phase is properly ad-
justed, the amplitude of the 19–kHz will remain constant when switching between left and right.
4. Recheck the separation adjustment as described in section 5.2.1. 5.3 Frequency Synthesizer Adjustments 5.3.1 Frequency (Channel) Selection Refer to section 2.3.
5-3 Adjustments and Tests
5.3.2 Modulation Compensator Refer to section 2.3.1 5.3.3 Frequency Measurement and Adjustment Next to the 10.24–MHz VCXO in the RF Exciter circuit on the motherboard, is a 50K potenti-ometer (R101). Use R101 to set the frequency of the 10.24–MHz VCXO while observing the output frequency of the synthesizer. Use one of two methods for checking frequency: 1. Use an FM frequency monitor. 2. Couple a frequency counter of known accuracy to the output of the synthesizer and ob-
serve the operating frequency. 5.3.4 FSK Frequency Offset Control An FSK signal (used for automatic identification of FM repeaters) shifts the frequencies of the 10.24–MHz VCXO reference oscillator and the VCO. Ground pin 4 on the DB25 connector located on the back panel of the transmitter. This will shift the operating frequency. Adjust R224 for an offset of the operating frequency of about 6 kHz. Un-grounding pin 4 will cause the operating frequency to return to normal. Use one of two methods for checking frequency: 1. Use an FM frequency monitor. 2. Couple a frequency counter of known accuracy to the output of the synthesizer and ob-
serve the operating frequency. 5.4 Metering Adjustments 5.4.1 Power Calibrate While looking at RF Power on the digital panel meter, set the Power Calibrate trim potenti-ometer (R215) to agree with an external RF power meter. 5.4.2 Power Set With the front panel RF Output control fully clockwise, adjust the Power Set trim pot (R55) to 10% more than the rated power (33 W for FM30, 165 W for FM150, 330 W for FM300) as indicated on an accurate external watt meter. If the authorized power is less than the maxi-mum watts, you may use the Power Set to limit the range of the RF Output control.
5-4 FM30/FM150/FM300 User’s Manual
5.4.3 SWR Calibrate When the Carrier switch is off, or the RF power is less than about 5 watts, the SWR circuit automatically switches to a calibrate-check mode. (See section 4.5 for more information.) Set the digital panel meter to read SWR. With the Carrier switch off, set the SWR CAL trim pot (R66) to read 1.03. 5.4.4 PA Current Limit Since it may not be practical to increase the PA current to set the PA Current Limit control, you may use this indirect method. With the carrier turned off, look at the DC voltage at the right end of R186 in the Metering circuit on the motherboard. The current limit, in amperes, will be 0.35 amps higher than ten times this voltage. For example, for a current limit of 7.35 amps, adjust the PA Current Limit control for 0.7 volts at R186 ; or 0.565 volts for 6.0 amps. Set the current limit for 4 amps (FM50), 7 amps (FM150), or 9.5 amps (FM300). 5.5 Motherboard Configuration See section 4.6.1 for motherboard jumper configuration. 5.6 Display Modulation Calibration The Modulation Calibrate trim pot sets the sensitivity of the front panel Modulation bar graph display. This adjustment may be made only after the Output trim pot on the Audio Processor/Stereo Generator board has been set. (See section 5.2.2.) Set the Stereo-Mono switch to Mono. Feed a sine wave source of about 2.5 kHz into the left channel at a level sufficient to put the wideband gain-reduction indicator somewhere in the middle of its range. Set the Modulation Calibrate trim pot so that the “90” light on the front panel Modulation dis-play just begins to light.
5-5 Adjustments and Tests
5.7 Voltage Regulator Adjustments JP1, a 10–pin header on the Voltage Regulator board, sets the time between program fail-ure and carrier turnoff. Pins 1 and 2 are the two pins closest to the edge of the board. The times are approximate. Sections 2.11, 2.12, and 4.8 contain further information. 1. Short pins 1 and 2 for a 30–second delay. 2. Short pins 3 and 4 for a 2–minute delay. 3. Short pins 5 and 6 for a 4–minute delay. 4. Short pins 7 and 8 for an 8–minute delay. You may select other times by changing the value of R21. The time is proportional to the re-sistance. 5.8 Bias Set (RF Power Amplifier) The Bias Set trim pot is located inside the PA module on the input circuit board. Set the trim pot to its midpoint for near-optimum bias.
5-6 FM30/FM150/FM300 User’s Manual
5.9 Performance Verification Measure the following parameters to receive a comprehensive characterization of trans-mitter performance: • Carrier frequency • RF output power • RF bandwidth and RF harmonics (see section 5.12) • Pilot frequency, phase, and modulation percentage • Audio frequency response • Audio distortion • Modulation percentage • FM and AM noise • Stereo separation between left and right • Crosstalk between main channel and subcarrier • 38–kHz subcarrier suppression • In addition to the above tests, which pertain to signal quality, a complete check of the
unit will include items listed in section 5.21. 5.9.1 Audio Proof-of-Performance Measurements References to “100%” modulation assume 9% pilot and 91% for the remainder of the com-posite stereo signal. Because the audio processing threshold is at 90% modulation, it is not possible to make audio proof-of-performance measurements at 100% modulation through the audio proces-sor. Instead, data is taken at a level below the audio processing threshold at 80% modula-tion. 5.9.2 De-emphasis Input Network A precision de-emphasis network, connected between the test oscillator and the audio in-put of the transmitter, can be very helpful when making the audio measurements. Note that the input impedance of the transmitter or the source impedance of the test oscillator can affect network accuracy. With the de-emphasis network, oscillator level adjustments need only accommodate gain errors, instead of the whole pre-emphasis curve.
5-7 Adjustments and Tests
5.10 Carrier Frequency Carrier frequency is measured at the output frequency with a frequency monitor or suitable frequency counter. To adjust frequency, see section 5.3.3. (FCC tolerance +/– 2000 Hz per FCC Part 73.1540 and 73.1545.) 5.11 Output Power The output power reading on the front panel display should be 90–105% of the actual value. For a more precise measurement, use a watt meter in the RF output line. See sections 5.4.1 and 5.4.2 for setting power. 5.12 RF Bandwidth and RF Harmonics You can observe RF bandwidth and spurious emissions with an RF spectrum analyzer. In the Stereo mode, feed a 15.0–kHz audio signal into one channel to provide 85% modula-tion as indicated on a monitor. Doing so produces 38% main, 38% stereo subcarrier, and 9% pilot per FCC Part 2.1049. As an alternative, use pink noise into one channel. Using a spectrum analyzer, verify the following (per FCC 73.317): 1. Emissions more than 600 kHz from the carrier are at least 43 + 10log(power, in watts)
dB down (58 dB for 30 watts, 65 dB for 150 watts, 68 dB for 300 watts). The scan should include the tenth harmonic.
2. Emissions between 240 kHz and 600 kHz from the carrier are down at least 35 dB. 3. Emissions between 120 kHz and 240 kHz from the carrier are down at least 25 dB. 5.13 Pilot Frequency The pilot frequency should be within 2 Hz of 19 kHz. (FCC Part 73.322.) Using a frequency counter, measure 1.9 MHz at pin 13 of U208 on the Audio Processor/Stereo Generator board. A 200–Hz error here corresponds to a 2–Hz error at 19 kHz. If the frequency is off by more than 50 Hz, you may change the value of C213. (Changing C213 from 56 pF to 68 pF lowers the 1.9 MHz by about 35 Hz.) 5.14 Audio Frequency Response For the response tests, take the readings from an FM modulation monitor. Make audio frequency response measurements for left and right channels at frequencies of 50 Hz, 100 Hz, 400 Hz, 1 kHz, 5 kHz, 10 kHz, and 15 kHz. See sections 5.9.1 and 5.9.2.
5-8 FM30/FM150/FM300 User’s Manual
5.15 Audio Distortion Make distortion measurements from the de-emphasized output of an FM modulation moni-tor. Make audio distortion measurements for left and right channels at frequencies of 50 Hz, 100 Hz, 400 Hz, 1 kHz, 5 kHz, 10 kHz, and 15 kHz. See sections 5.9.1 and 5.9.2. 5.16 Modulation Percentage While feeding an audio signal into the left channel only, confirm that the total modulation percentage remains constant when switching between Mono and Stereo. Measure modulation percentage with an FM modulation monitor. See section 5.2.2. 19–kHz pilot modulation should be 9%. 5.17 FM and AM Noise Take noise readings from a de-emphasized output of a modulation monitor. 5.18 Stereo Separation Make left-into-right and right-into-left stereo separation measurements with an FM modula-tion monitor for frequencies of 50 Hz, 100 Hz, 400 Hz, 1 kHz, 5 kHz, 10 kHz, and 15 kHz. 5.19 Crosstalk For stereo crosstalk measurements, both left and right channels are fed at the same time. For best results, there needs to be a means of correcting small imbalances in levels and phase. The balance is made at 400 Hz. 5.19.1 Main Channel Into Sub Feed the left and right channels in phase with audio (L+R) at 50 Hz, 100 Hz, 400 Hz, 1 kHz, 5 kHz, 10 kHz, and 15 kHz at 100% modulation, while observing the stereo subcarrier (L-R) level on an FM modulation monitor. 5.19.2 Sub Channel Into Main Feed the audio into the left and right channel as above, with the exception of reversing the polarity of the audio of one channel (L-R input). Using the frequencies of 5.19.1 above, ob-serve the main channel (L+R) level with a modulation monitor.
5-9 Adjustments and Tests
5.20 38–kHz Subcarrier Suppression With no modulation, but in the Stereo mode, the 38–kHz subcarrier, as indicated on an FM modulation monitor, should be down at least 40 dB. 5.21 Additional Checks In addition to the tests and adjustments mentioned in this section, the following checks en-sure a complete performance appraisal of the transmitter: 1. Perform a physical inspection, looking for visible damage and checking that the chassis
hardware and circuit boards are secure. 2. Check the functionality of switches and processing control. 3. Verify that all indicators function. 4. Check the frequency synthesizer lock at 80 MHz and 110 MHz. 5. Measure the AC line current with and without the carrier on. 6. Perform a functional test of the SCA input, Monitor outputs, and the monitor and control
function at the 15–pin, D-sub connector. 7. Test the functionality of the FSK circuit. 8. Check the operation and timing of the automatic carrier-off circuitry associated with pro-
gram failure. 9. Check all metering functions. 10. Test ALC action with PA current overload, SWR, and PLL lock. NOTE: FCC type acceptance procedures call for testing the carrier frequency over the temperature range of 0–50 degrees centigrade, and at line voltages from 85% to 115% of rating. (See FCC Part 2.1055.)
5-10 FM30/FM150/FM300 User’s Manual
Section 6—Reference Drawings
The illustrations in this section may be useful for making adjustments, taking measurements, troubleshooting, or understanding the circuitry of your transmitter.
6-1 Reference Drawings
6.1 Views
Illustration 6-1 Front View
Illustration 6-2 Rear View
DC Input
Circuit Breaker
RF Power Amplifier (FM150/300 Only)
AC Power Input
RF Output
RF Output Monitor
Receiver Input (Optional)
SCA Inputs
Composite Input
Remote I/O
Audio Monitors
Audio Inputs
Audio Processor Input Level Indicators Input Gain
Switches
Processing Control
Frequency Selector Switches
Stereo/Mono Switch
RF Output Control
Power Switch
Gain Reduction/Expansion
Indicators
Digital Multimeter
Multimeter Select
Fault Indicators
Modulation Indicators
Carrier Switch
6-2 FM30/FM150/FM300 User’s Manual
Illustration 6-3 Chassis Top View
Voltage Regulator Power Regulator
RF Pre-driver/ Amplifier
Bridge Rectifier
Filter Capacitor
AC Power Transformer
AC Power Entry
6-3 Adjustments and Tests
Illustration 6-4 Chassis Bottom View
Audio Processor Section
Stereo Generator Section
Metering Circuit
RF Low Pass Filter & Reflectometer
RF Exciter Circuit
RF output
Power Amplifier (FM150/M300 Only)
DC Input
6-4
Notes:
FM30/FM150/FM300 User’s Manual
Illustration 6-5 Audio Processor/Stereo Generator Board
6.2 Board Layout and Schematics
6-5 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
Schematic Diagram: Audio Processor/ Stereo Generator (Sheet 1 of 2)
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THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO AND ELECTRONICS CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED ASTHE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION.
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R31K R4
49.9KC4
100pF
C2
1uF
R1110.0K
IN1
EC+
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EC-
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OUT 8
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D6
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R122.00K
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0X 12
1X 14
2X 15
3X 11
0Y 1
1Y 5
2Y 2
3Y 4
A 10
B 9
INH 6
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INV C1
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AGND3
V+4
AGND5
COMP1*6
INV A7 NC 8
Vout 9
NC 10
fCLK 11
V- 12
COMP2* 13
R(h I) 14
U5
LTC1064-1
R18100K
Q12N5087
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RG112
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7
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AGND3
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NC 10
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R9149.9K
R9249.9K
R9449.9K 5
67U15B
TL072
D14
1N4148
C22
100pF
C20
100pF
D13
1N4148
R993.3M
R98330K
C21.047uF
POLY
R96
ZERO
R603.3K
R9710M
PROC B(J3-18)
PROC A(J3-16)
PROC C(J3-20)
TO R50 ONDISPLAY BD.
HEAVY
LIGHT
R101
1.0K
C231uF
R100
10M
R102
10.0K
R953.0K
-VT
NC1
Vin2
NC3
GND4 TRIM 5
Vout 6
NC 7
NC 8
U18REF02
3
21
84
U19A
NE5532
5
67
U19B
NE5532
R12610K
C32.01uF
C36.01uF
-12V
+12V+12V
R128100
R1274.7K
R12910.0K
R130100
C331uF
C341uF
C351uF
+5V
+5.00V
+5V
VCC
C371uF
C381uF
-5V
VSS
+12V 123
SW1
SIP3NORMAL
TEST
+12V
D23
1N4148
R104
5.1K3
21
84
U17A
NE5532
D24
1N4148R10510K
+5V
+12V
-12V
R10649.9K 5
67
U17B
NE5532
R10749.9K
+VT
-VT
R201K
C100.1uF
+ C28
10uFTANT
DS11N5818
+7V
DS21N5818
+
C2910uFTANT
-7V
R10
5101.52MHz
C6
1uF
C6A
1uF
C16
1uF
C16A
1uF
IN1
EC+
2
EC-
3
V+
7V
-5
OUT 8
GN
D6
SYM
4
U6THAT2180
R2310K
R24
30K
+5V
-5VR27
1.0KR281.0K
1 23 45 67 89 10
HD1
HEADER 5X2
R70
5.62K
R681.0K
R671.0K
C7.0027uFPOLY (C8687-3)
R21300
R2549.9
R265.1K
-12V
R2224.9K
+12V
+5V
IN1
EC+
2
EC-
3
V+
7V
-5
OUT 8
GN
D6
SYM
4
U12THAT2180
R6310K
R64
30K
+5V
-5V
C17.0027uFPOLY (C8687-3)
R61300
R6549.9
R665.1K
-12V
R6224.9K
+12V
FLAT
50uS75uS
3
21
84
U7A
TL072
R2924.9K
-12V
+12V
C8
33pF
5
67
U7B
TL072
D11N6263
R3524.9K
D11N6263
R3624.9K
R37499
D51N4148
D61N4148
+VT
-VT
C92200pFPOLY
LEFT
3
21
84
U13A
TL072
R6924.9K
-12V
+12V
C18
33pF
5
67
U13B
TL072
D91N6263
R7524.9K
D101N6263
R7624.9K
R77499
D111N4148
D121N4148
+VT
-VT
C192200pFPOLY
RIGHT
5
67
U16B
TL072
R1183.3K
R11924.9K
C24
.01uFPOLY
R120OPEN
C25
OPENC26
100pFD17
1N4148
R121
1M
C271uF
R122
1.0K
R123
10.0K
R116
49.9KR11549.9K
R117560
-VT
3
21
84
U16A
TL072
+12V
-12V
R113
49.9K
R114
49.9K
D16
SHORT
0.25V/DBR112
100HI GR
1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 26
J3
RECEPT 13X2
/STEREO FAULTHI GRBR GRPROC CPROC BPROC A+5.00VR VUL VU/+12DB/+6DB-12V+12V
+/- 12V FOR OP-AMPS AND VCA'S.
+/- 7V AT 56mA FOR LTC 1064-1 AND LMF100.
+/- 5V FOR LOGIC (+5V TAKEN FROM +5.00V BUS
+5.00V REFERENCE VOLTAGE. ALSO USED BY D
+/- 4.4 FOR PEAK LEVEL THRESHOLD REFERENC
1 23 45 67 89 1011 1213 1415 1617 1819 20
J1
RECEPT 10X2
L IN1L IN2R IN1R IN2
15.2 KHz LOW-PASS FILTER(8th ORDER ELLIPTICAL)
(INTO 600 ohms)
dbm V-rms V-peak-10 .245 .346 0 .774 1.1+10 2.45 3.46
TURKEY SPECIFICATIONS:
Baseband: 30Hz - 53KHz +/- 0.2dB. 53KHz - 76KHz +/- 0.4dB.
40Hz - 15KHz +/- 0.5dB40H 7 5KH 0 5% THD
GAIN R9-14 --------------------------- 0dB OPEN +6dB 50.5K +12dB 16.8K +18dB 7.21K
L VU
L IN2
L IN1
R3847K
R3947K
+5V
/+12DB/+6DB
R IN2
R IN1
R VU
L SAMPLE
R SAMPLE
R SAMPLE
L SAMPLE
LEFTLEFT
RIGHTRIGHT
CLOCK1.52MHz
+12V
-12V
+7V
-7V
+5V+5.00V
-5V-5V
+12V
-12V
+7V
-7V
+5V
-5V
VDD
VEE
+VT
-VT
+VT
-VT
GNDGND
C401uF
C421uF
C441uF
C411uF
C431uF
C451uF
-12V
+12V +12V
-12V
201409F-SCH1 2
C
AUDIO PROCESSOR/STEREO GENERATOR
DW 03-15-07
DW 03-15-07
DP 03-15-07
Copyright (c) 2007 HCJB Global
6-6 Adjustments and Tests
Schematic Diagram: Audio Processor/ Stereo Generator (Sheet 2 of 2)
1 2 3 4 5 6 7 8 9 10 11 12
A
B
C
D
E
F
G
H
121110987654321
H
G
F
E
D
C
B
A
DWG. NO. REV.
65
THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO AND ELECTRONICS CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED ASTHE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION.
SHEET OFSCALE : NONE PROJ NO.
DWG . NO . REV
TITLE:UNCONTROLLED
UNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
SIZE
B
RG112
3
75
RG286
4
U201
AD622
R2031K
R20449.9K
C202100pF
+12V
-12V
R2011K
R20249.9K
C201100pF
R2063.9K
EXT IN-
EXT IN+
R20
5
OPE
N
32
1
84
U202A
TL072
R207150K
C206
.047uF
-12V
+12VR208300K
POLY
C205
.047uF
LEFTR2094.99K
1 2 3HD201SIP3
R2102.49K
C207.01uFPOLY
56
7U202B
TL072
R211
100MON L
32
1
84
U203A
TL072
R212150K
C209
.047uF
-12V
+12VR213300K
POLY
C208
.047uF
RIGHTR2144.99K
1 2 3HD202SIP3
R2152.49K
C210.01uFPOLY
56
7U203B
TL072
R216
100MON R
POLY
POLY
50 75
50 75
X11
X22
U03
U14
U25
Y16
Y27 V- 8REF 9
Z2 10Z1 11
OUT 12DD 13V+ 14
U204
AD734
R220
10.0K
R219
10.0K
R218
9.09K
+12V C21156pF
C212
120pF
1%
R221
4.99K
R223
9.09K
X11X22
Y13
V+
8V
-5
OUT 7
Z 6Y24
U204A
AD633JN
-12V
+12V
R25449.9K
AD633 ALTERNATE TO AD 734
R254 used ONLY with AD633AD734 has internal 50K
LPA
1B
PA2
HPA
3IN
V A
4S1
A5
SA/B
6V
A+
7V
D+
8L
SH9
CL
K A
10C
LK
B11
50/1
0012
VD
-13
VA
-14
AG
ND
15
S1 B
16
INV
B17
HPB
18
BPB
19
LPB
20
U211LMF100
C218
0.1uF
R252
1KC2191000pFPOLY
R253
1KC2191000pFPOLY
C221
0.1uF
R255
1KC2221000pFPOLY
R256
1KC2231000pFPOLY
+7V
-7V
R24
749
.9K
R24
610
.0K
R25
149
.9K
R25
010
.0K
R245
13KR2445K
C216
0.1uF
1213
11U210D
74HC86
910
8U210C
74HC86
R240
24K
R241
10K
45
6U210B
74HC86
12
3U210A
74HC86
R242
120K
R243
49.9K
C216
0.1uF
CLR12CKA13 QA 11
QB 10QC 9QD 8
U209B74HC393
9 8
U207D
MC74HC04
11 10U207E
MC74HC04CLR2CKA1 QA 3
QB 4QC 5QD 6
U209A
74HC393
R266
OPEN
R267
1KSYNC OUT
38KHz
19KHz
2CLR14
2CKA152QA 13
2CKB12 2QB 112QC 102QD 9
U208B
74HC390
304KHz
1CLR2
1CKA11QA 3
1CKB4 1QB 51QC 61QD 7
U208A
74HC390
3.8MHz
1.52MHz
1.9MHz
5 6U207C
MC74HC04
/EXT ENABLE
R23810K
+5V
3 4U207B
MC74HC04
13 12U207F
MC74HC04
1 2U207A
MC74HC04
R2371M
C21533pFNPO
C2145.5-18pF
Y201
7.6 MHzC21356pFNPO
R236
1K
0X121X142X153X11
0Y11Y52Y23Y4
A10B9
INH6
X 13
Y 3
U205
74HC4052
R222
200K
D206
1N4148
D204
1N4148
D202
1N4148
D205
1N4148
D203
1N4148
D201
1N4148
MONO/STEREO
R23910K
32
1
84
U206A
MC34083
-12V
+12V
R225
12.4K
R2241K
C204
OPENR230
0
C203100pF
R217
0SCA IN
EXTERNAL COMPOSITEINPUT
Composite Spec. (Turkey):30Hz - 53KHz +/- 0.2 dBr53KHz - 76KHz +/- 0.4dBr
R2341K
D208
1N4148
D207
1N4148+5V-5V
R2271K
R2283K
COMPOSITE OUTPUT
R226
43K
56
7U206B
MC34083
R231
20K
C224
22pF
R232
100
R233
100
COMP OUT
COMP METER
R229
24K
R2581K
R257
43K
R2593K
19KHz Level
56
7U212B
TL072
C224.001
+5V
R26324.9K
Q202MPS-A06
+12V
R264
10K+7V
R265
10
32
1
84
U212A
TL072
R260
10.0K
-12V
+12V
C226.001
Q201MPS-A56
-12V
R262
10
R261
10K-7V
12345678910
J203
RECEPT 5X2
-12V+12V
DZ2ICTE-15
DZ1ICTE-15
-12V+12V
123456789
101112
J201
12 HEADER
EXT IN+EXT IN-SCA INCOMP OUTCOMP METERMONO/STEREO/EXT ENABLEGND
123456789
101112
J202
12 HEADER
MON LMON R
GND
+5.00VSYNC OUT
C2271uF
C2281uF
-7V +7V
LEFT 8VPP (AT 2000Hz)
RIGHT 8VPP (AT 2000Hz)
201409F-SCH2
C
AUDIO PROCESSOR/STEREO GENERATOR
2
LEFT LEFT
RIGHT RIGHT
CLOCK 1.52MHz
+12V-12V+7V-7V
+5V +5.00V
-5V -5V
+12V-12V+7V-7V
+5V
-5V
VDD
VEE
+VT-VT
+VT-VT
GND GND
SEPARATION
Copyright 2006 Michael P. Axman
Copyright (c) 2007 HCJB Global
6-7 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
Illustration 6-6 Motherboard
Adjustments and Tests 6-8
Schematic Diagram: Motherboard (Sheet 1 of 3) 1 2 3 4 5 6 7 8 9 10 11 12
A
B
C
D
E
F
G
H
121110987654321
H
G
F
E
D
C
B
A
DWG. NO. REV.
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
65
THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO AND ELECTRONICS CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED ASTHE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION.
SHEET OFSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALS
DWNCHK
CMPE
DISTRIBUTIONK
SIZE
D
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
A 03-08-07 DW DW
C16.01
C17.01
C18.01
C19.01
C20.01
C21.01
C22.01
C23.01
R28
220
C68OPEN
C67OPEN
C66OPEN
R11 390R12 390
R10 1KR9 220
R13 100
R14 220
C5.01
C6.001
C7.001
C8.001
C9.01
C10.01
C58.01
C59.01
C60.01
C62.01
C64.01
C65.01
123
J13
HEADER 3X1
1 2 3J2OPEN
C3220pF
C4220pF
C13220pF
C14220pF
C15220pF
C12220pF
C11220pFR6
1K
R8
1K
R171K
R181K
R201K
R161K
R151K
R19
240
1 2 3 4 5HD6OPEN
23
1
REF. FORXLR CON.
HILOGND
SCA
EXT_
RTN
EXT_
INM
ON
_LM
ON
_R
-12V
+12V J18MCX
J19MCX
RF OUT
+5.00V
D11N4148
1 2 3 4 5 6 7 8 9 10
J26 HEADER 5 x 2
V+TEMP
GND
R177 1K
R176 1K
R150 1K123456789
10
J25
HEADER 5 x 2
123456789101112
J6
HEADER 12
123456789101112
J7
HEADER 12
+5.00V
R IN2
R IN1
L IN2
L IN1
LPIN L
LPOUT L
LPIN R
LPOUT R
+12V
-12V
L VU
+5.00V
PROC A
PROC B
PROC C
R VU
BR GR
HI GR
123456789
1011121314151617181920
J15
+12V
+12V
-12V
C159.001
C158.001
C157.001
C140.01
R216
1KFM TP1
VOLTMETER
123456
J14
HEADER 6X1 .156
+12V
C55.01
C56.01
C57.01
Q3IRF541
R7
300
R5
300Z8
OPEN
Z7
OPEN
123J1XLR
C2220pF
C1220pF
R41K
R2
1K
R1300
R3300
Z3
OPEN
Z5
OPEN
Z4 OPEN
Z6 OPEN
Z1JUMPER
Z2JUMPER
J1
123456789101112
STEREO GENERATOR
J2
123456789101112 1
23456789
10
J8
HEADER 5 x 2
J3
12345678910
+12V
-12V
SCA
IN
EXT
RTN
EXT
IN
/EXT ENABLE
CO
MPO
SITE
1
MON RMON L
LPIN LLPOUT LLPIN RLPOUT R
1234567891011121314151617181920
J11
HEADER 10 x 2
J1
1234567891011121314151617181920
AUDIO PROCESSOR
12345678910
J9
HEADER 5 x 2
J2
12345678910
123456789
1011121314151617181920212223242526
J10
HEADER 13 x 2
J3
1234567891011121314151617181920212223242526
+12V
-12V
/+6DB
/+12DB
+5.00V
COMP METER
COMP METER
COMP METER
STEREO/MON
STER
EO/M
ON
1234567891011121314151617181920
J12
HEADER 10 x 2
ALC
ALC
ALC
ALC
ALC
FAN
TP4+12V
+12V
TP3-12V
-12V
TP5+5.00V
+5.00V
TP7GND
2
31U1A
TL072
C241.0+12V
C251.0-12V
R32
24.9K1%
R34 24.9K 1%
R3624.9K1%
R35
24.9K1%
Z11
OPENEXT RTN
Z10
OPEN
R30
3.9K 5
67U1B
TL072
R291K
EXT IN
R38 1KZ14
OPENSCA IN
D2
1N41
48 D3
1N41
48
R37
4.02K1%
R33
100
R31
100Z12
OPEN
Z13
OPEN
CO
MP
MET
ER
CO
MPO
SITE
1
CO
MPO
SITE
1
STEREO GENERATOR SHUNT
NC1
Vin2
TEMP3
GND4 TRM 5
Vout 6
NC 7
NC 8U2
REF02
+12V
C26
1.0
2
31U3A
TL072
C291.0+12V
C301.0
-12V
5
67U3B
TL072
R39
100
C27.01
R404.7K
C281.0
Z9
OPEN
+5.00V
AUDIO PROCESSOR SHUNT
-METER PAV
-METER PAI
-METER RFW
-METER PA TEMP
-METER BATT
-FAULT SUM
-/AUTO_CARR_OFF
-/CARR OFF
_FSK IN
_ALC
38 KHZ OUT
_/EXT ENABLE
L IN
1
L IN2
R IN1
R IN
2
R I
N1
L IN
2
R27
220
R26
220
R25
220
R24
220
R23
220
R22
220
R21
220
FAU
LT S
UM
FAU
LT S
UM
MET
ER B
ATT
MET
ER B
ATT
MET
ER P
ATE
MP
MET
ER P
ATE
MP
MET
ER R
FW
MET
ER R
FW
MET
ER P
AI
MET
ER P
AI
MET
ER P
AV
MET
ER P
AV
ALC
FSK
IN
FSK IN
FSK IN
NCNC
NCNC
NC
NCPA
IPA
V
/LO
CK
FA
ULT
C61.001
C63.001
DC
SU
PPLY
TEM
P
TEMP
INPU
T
INPUT
FAN-
+12V
FAN
V-M
ETER
RFV
RF
FWD
RF
REV
/LO
CK
FM_/LOCK
FM_/
LOC
K
NC
38KHZ38KHZ
NC
NC
NC
NC
NC
NOTES:UNLESS OTHERWISE SPECIFIED:1. ALL RESISTORS ARE IN OHMS, 1/4W, 5% TOL.2. ALL CAPACITORS ARE IN MICROFARADS.
DW 10-05-06
DW 10-05-06
/EXT ENABLE
/EXT ENABLE
COMPOSITE METER
INPUT CONFIGURATION CHARTNON-OMNIA BOARD INPUT IMPEDENCE
Z1, Z2 ONZ3, Z5, Z7, Z8 OFFZ4, Z6 OFF
50 KOHM
Z1, Z2 ONZ3, Z5, Z7, Z8 ONZ4, Z6 OFF
600 OHM
OMNIA BOARD AES/EBU INPUT
Z1, Z2 OFFZ3, Z5, Z7, Z8 OFFZ4, Z6 ON
ANALOG LEFT/RIGHTLEFT IN 1 LEFT IN 2
Z31
OPEN
Z32
OPENINSTALLED WHEN USINGAUDIO PROC. SHUNT CKT.
Z22
OPE
N
Z21
OPE
N
Z20
OPE
N
Z19
OPE
N
Z18
OPE
N
Z17
OPE
N
Z16
OPE
N
Z15
OPE
N
Z30
JUMPER
Z29
JUMPER
Z28
JUMPER
Z27
JUMPER
Z26
JUMPER
Z25
JUMPER
Z24
JUMPER
Z23
JUMPER
SCH, UNIVERSAL MOTHER BOARDDP 10-05-06
DP
201497F-SCH A1
201207F-SCH A
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13J3
DB25_2X
FMV CONTROL-FMV CONTROL
FMV CONTROL
38KHZ
38KHZ
38KHZ
123456789
1011121314151617181920
J29
FM
WR
PAI
PAI
PAV
PAVN/CN/C
/LOCK FAULT
/LOCK FAULT
DC SUPPLY
NC /CARR_OFF
TEMP
/AUTO_CARR_OFF
TEMP 123
J28
HEADER 3X1
-COMPOSITE OUT
WR TP1ANTENNA SWR
REM RAISE
REM LOWER
REM SWR
DC SUPPLY
EXT
ALC
CO
NTR
OL
RF_
LVL
LOC
K
E2
E3
E4
C541.0
12345678910 J24
HEADER 5 x 2
R22
2
1K
RDS TX
RDS RX
+12V
WRFM
V+TEMPGND
123
J25
HEADER 3X1
RF_
LVL
LOC
/REM
OTE
ALC
RF EXCITER
201497F-SCH-SH3.SCH
ALC/METERING
201497F-SCH-SH2.SCH
FM_/
LOC
KA
LCM
ETER
PA
VM
ETER
PA
I
MET
ER P
ATE
MP
MET
ER B
ATT
MET
ER R
FW
FAU
LT S
UM
GN
D
+5.0
0V
/LO
CK
FA
ULT
DC
SU
PPLY
PAI
PAV
EXT
ALC
CO
NTR
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TEM
PFA
NV
-MET
ERR
FVR
F FW
DR
F R
EVIN
PUT
+12V
-12V GN
D
FSK
IN
LOC
K
/LO
CK
RF_
LVL
LOC
/REM
OTE
ALC
CO
MPO
SITE
1
+12V
-12V
38KHZ
/CARR_OFF
/AUTO_CARR_OFFINPUTN/CN/CN/CN/CN/CN/C
N/C
RF
OU
T
RF_LVL
-12V
+12V
R IN
2
L IN1
FMV CONTROL
123
J16
HEADER 3
REM PWR CNTRL
TP6+5V
+5V
PRODUCTION RELEASE
6-9 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
Schematic Diagram: Motherboard (Sheet 2 of 3)
DWG. NO. REV.
H
G
F
E
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
H
G
F
E
D
C
B
A
1 2 3 4 5 6 8 9 10 11 12
SHEET OFSCALE : NONE PROJ NO.
DWG . NO . REV
TITLE:
SIZE
C
C_L_SHT2_A.DOT REV. A
NOTES:
UNLESS OTHERWISE SPECIFIED:
1. ALL RESISTORS ARE IN OHMS, 1/4 W, 5% TOL.
2. ALL CAPACITORS ARE IN MICROFARADS.
PAI LIMIT
RF POWER (RFV SQUARED) RF POWERSWRALCPA DCVPA DCI
1.00
VFM_/LOCK
ALC
FAULT SUM
SWR LAMP
PADC LAMP
LOCK LAMP
SEL ASEL BSEL C
DPM IN
RF
FWD
DC SUPPLY
RF REV
RF FWD
SEL ASEL BSEL C
DPM REFSWR LAMP
PADC LAMP
LOCK LAMP
+5.00V
DPM IN
+12V-12V
-12V
+5V
+12V
+5V
+12V
-12V
VCC
VSS
VDD
VEE
-12V
+12V
-12V
+12V
POWER CAL
+5V
.001V per Watt
+5V
FULL SCALE1999 WATTS19.9919.99V199.9V19.99A
PA TEMPERATURESUPPLY DC VOLTSVOLTMETER
199.9V199.9V
1mV/Degree C
10mV/Volt100mV/Amp
10mV/Volt10mV/Volt
VOLTMETER
199.9 Deg. C
10mV/Deg. C
5.00V = 100 deg. C
1.00V = 10.0A
1.00V = 10VDC
INPUT
(1.999V reads "1999")
INPUT LAMP
+5V
(Cla
mp
SWR
read
ing
(2.5
VD
C a
t 100
W)
(1.00V at 100W)
(.135V)
INPUT LAMP
PATEMP LAMP
PATEMP LAMP
RF_LVL
FAN
TEMP OUTMETER PATEMP
METER RFW
METER BATT
-12V
-12V
-12V
J22-1
J1-2
J1-4
J2-3
J2-6
J2-7
J2-8
J2-9
J2-10
J2-11
J22-12
J3-2J3-4J3-6
J30-19
J23-8
J2-7
J4-6
J4-5
J30-16
J30-18
J30-12
J30-14
J30-20
J3-9,10
-12V -12V+12V+12V
+12V
-12V
-12V
U8,9 pin 7
+5.00V
+5.00V
+5.00V +5.00V
/LOCK FAULT
-6.9V
-6.9V
+5V
PAV
J23-1
J4-12
PAI
50mv per degree C.
C132.001
C152.001
C1550.1
C124.01
C123.01
C1530.1
D351N6263
C142.001
C1301.0
C1331.0
C1391.0
12
1314U22D
TL074
5
67U22B
TL074
3
21
411
U20A
TL074
12
1314U20D
TL074
10
98U22C
TL074
10
98U20C
TL074
5
67U20B
TL074C1170.1
C1600.1
C1210.1
C129.001
C131.001 D36
1N6263
C134.001 D38
1N62635
67U24B
TL074
C135.01
10
98U24C
TL074
10
98 U23C
TL074
C1431.0
12
1314U24D
TL074
C1281.0
C1561.0
C119.01
C1411.0
C1200.1
D291N4148
3
21
411
U24ATL074
D391N4148
D37
1N4148
D34
1N4148
3
21
411
U23ATL074
5
67U23B
TL074
D331N4148
D301N4148
D321N4148
C154.001
D47 1N4148
D44
1N4148
D43
1N4148
D46
1N4148
D42
1N4148D45
1N4148
D40
1N4148
D311N4148
3
21
411
U22A
TL074
12345678910
J26
C118.01
R142100
R16210.0K
R161100K 2
31U19A
TL072
5
67U19B
TL072
R1631.1K
R1532.49K
R144100
R19510K
R18633K
R19415K
R1872.2M
R175 120K
R193100K
11 10
U25E
74HC14
13 12
U25F
74HC14
9 8U25D
74HC14
1 2
U25A
74HC14
3 4U25B
74HC14
5 6U25C
74HC14
R22010K
R196 10K
R21951K R217 100K
R218 10K
R185200K
R1841K
R156100K
R155 11K
R19151K
R152100K
R190100K
R1361K
R171 100K
R17024.9K
R149 100
R18280.6K
R183240K
R165100K
R1641M
R16910K
R167
30.1K
R181240K
R166220K
R158100K
R16068.1K
R1571M
R5510K R188
33K
R151 120K
R154 120K
R1891M
R135100K
R17310K
R146100
R1741.1K
R137100K R168
1K
R14010K
R19822K
R197100K
R178 1K
R13910K
R13810K
R19922K
R200100K
R203100K
R20510K
R21510K
R20422K
1234 5
678
Q7
LM394
1234 5
678
Q6
LM394
R2073.3K R213
49.9K
R21149.9K
R2097.5K
R20810.0K
R2101.1K
R148
100
R20639K
R2021K
R2011M
R180
3K
R172
100K
Vin3
GN
D2
Vout 1
VR478L05
R2143.3K
D48
LM329DZ
12345678910
11121314151617181920
J30
HEADER 10X2
R22110.0K
R2122.49K
X013
X114
X215
X312
X41
X55
X62
X74
INH6
A11
B10
C9
X 3
VCC 16
GND8
U21
74HC4051
1%
1%
1%
1%
1%
1%
1%1%
1% 1%
1%
1%
1%
1%
1%
1%
1%
D411N4148
R141 100K
1%
2
3 1Q52N5210
2
FM U5
ALC
METER PAV
METER PAI
METER RFW
METER PATEMP
METER BATT
FAULT SUM
/LOCK FAULT
DC SUPPLY
J22-5EXT ALC CONTROL
R68
10K
R64 10K
-12V
+12V
R6310K
R6010K
R5810K
2
31U9A
MC33282
5
67U9B
MC33282
C44.01
C47.01R62
10K
R1791K
1234 5
678
Q1
LM394
1234 5
678
Q2
LM394R59
3.32K
R57
3.32K
R61
49.9K-5V
R6610K SWR CAL
C49
20pF
R655.11K
C51.001
R69
10K R701.15K
R67100
RE
M S
WR
SW1SW-PB
SW2SW-PB
R4351.1K
R4451.1K
+5V
+5V
1
23U4A
74HC132
4
56U4B
74HC132
9
108U4C
74HC132
12
1311U6D
74HC132
belo
w 5
W.)
R491K
R481K
C41.001
+5.00V
5
67U8B
TL074
D11
1N753A
C42.001
D121N4148
12
1314U8D
TL074
10
98U8C
TL074
3
21
411
U8A
TL074
C43.001
D131N4148
C39.001
D101N4148
R51
3.32K+12V
123
SW8SWITCH
LOCAL ONLY
RF_LVL
POWER SET
-12V
+12V
6.2V
R143100
R145100
+C12747/20V
+ C12547/20V
1%
R192
3.16K
R159*
1 2 3
SW10SWITCH
M1/M2
POWER SETPOWER SET
R159 = 19.6K 1%
ALL FMR159 = 187K 1%
WRR159 = 200K 1%
POWER SET
1%
1%
+ C12647/20V
R147100
C531.0 C52
1.0
Vin2
GN
D1
Vout 3
VR1LM7905
-12V -5V
OPEN FOR FM30 UNITS
FM_/LOCK
C32
.01
C35
.01-12V
C40
.01+12V
C45
.01+12V
C46
.01-12V
C48
.01
C50
.01
2
31U10A
TL072
5
67U10B
TL072
4
8
12
1314U23D
TL074
+C12210/35VTANT
12
JP5
RE
M R
AIS
ER
EM
LO
WE
R
INPUT
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
INC1
U/D2
H3
GND4 W 5
L 6
CS 7
Vcc 8
U5
DS1804
+5V
12
1311U4D
74HC132
R47
51.1K
C33.01uF
R52
100K
R54
100K1
23U6A
74HC132C38.01uf
C37.01uF
R56100K
+5V
4
56U6B
74HC132
9
108U6C
74HC132
RE
M P
WR
CN
TL
+ C344.7uF
1%
TANT.
OPEN
LADRVRALL OTHERS
SCH, UNIVERSAL MOTHER BOARD
201497F-SCH A
201497F-SCH A
3
Adjustments and Tests 6-10
Schematic Diagram: Motherboard (Sheet 3 of 3)
DWG. NO. REV.
H
G
F
E
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
H
G
F
E
D
C
B
A
1 2 3 4 5 6 8 9 10 11 12
SHEET OFSCALE : NONE PROJ NO.
DWG . NO . REV
TITLE:
SIZE
C
C_L_SHT2_A.DOT REV. A
FM_/LOCK
+12V+5V
+5V
TP1
+8V
88-108 MHZ
COMPOSITE1
+8V
CLKDATALOAD
8.26V +8V
+5V
LF SEP.
CLOCK
DATA
/ENABLE
OSC in
Fin
VDD
VDD
+5V
+12V
VV
CO
FSK
+5V
CH. SEL.
DIRECT FSK
+5V
LOCK DET.
+5V
VU5
VU5
+12V
FSK IN
LOC/REMOTE Frequency Select
IDAUTO ID
BAND LIMIT
TP
DS1GREEN
DS2RED
IN3
C2
OUT 1
VR2LM317
12345
SW3
12345
SW5
12345
SW4
12345
SW6
12345
SW7
IN3
C2
OUT 1
VR3LM78L05
SW9RESET
SER
10
A11
B12
C13
D14
E3
F4
G5
H6
QH
9
CL
K2
QH
7
INH
15
SH/L
D1
U18OPEN
SER
10
A11
B12
C13
D14
E3
F4
G5
H6
QH
9
CL
K2
QH
7
INH
15
SH/L
D1
U17OPEN
12
34
56
78
910
J20OPEN
12345678910
RP1OPEN
123456789
10
RP2OPEN
R12910.0K
RA21
RA32
RTC3
CLR4
VSS5
RB06
RB17
RB28
RB39 RB4 10RB5 11RB6 12RB7 13VDD 14OSC2 15OSC1 16RA0 17RA1 18
U16PIC16C61
R11910.0K
R721K BECKMAN
R12568K
R12725K
R81150
R108680
R107680
R100
100K
R74237
R731.27K
C116.001 POLY
C80100PF
C79.001
C74.001
C75.001
C1083900PF
C98.001
C90.001
C77.001
C95.001
C97.001
C76.001
D28OPEN
D26OPEN
D241N4148
D271N4148
D21 1N4148
D17
1N6263
R115100K
R109100K
D221N4148
C69100PF
9 8
U15D74HC14
5 6
U15C74HC14
13 12
U15F74HC14
11 10
U15E74HC14
34
U15B74HC14
12
U15A74HC14
11
22
33
44
55
66
77
88
16 16
15 15
14 14
13 13
12 12
11 11
10 10
9 9
U13
MC145170
D231N4148
2 1
3
A2MAR-6
C81.001
R12339
12
34
56
78
VCO1POS-150
DS3
AMBER
12
34
56
78
910
J20HEADER 5X2
R97OPEN
R120
1.0K
C8933pF NPO
R106 10
C73.001
C103 .001
C1041
C107.001 POLY
R98100K
R105100K
R114100K
R111100K
R99100K
R104100K
R116100K
R2221.0K
R112100
R11310.0K
R124 1M
R13210.0K
R133 10.0K
R13410.0K
R118 10.0K
R11710.0K
R1031MR102
200K
C1110.01
R87 499K
D251N4148
R131150K
D191N4148
R96150
R9515
R86499K
21
3
A1
MAR-6
R8015
R79100
R88100
D151N4148
C112220pF
R122 4.99K
2
31
411
U14A
MC33284P
6
57 U14B
MC33284P
9
108U14C
MC33284P
13
1214U14D
MC33284P
2
31
84
U12ANE5532 5
67 U12B
NE5532
+5V
8
9
C921
C1021
C1061
C1091
C991
C831
C113 1
2
31
84
U11ATL072 5
67U11B
TL072C860.1
C870.1
C94 0.1
-12V
+12V
R932K
PWR. CNTRL. OFFSET
C88 0.1
-12V
R7810K
Q4IRFD9120
GS
DD143.9V
TP24.5 - 8.0V
1 2
Z34JUMPER
C78.01
PWR. CNTRL TILT
+8V
R7524.3K 1%
R76
30.1
K 1
%
R8426.7K 1%
R8524.3K 1%
R94
499
1%
R92
680.0
D16
6.2V 1N753A
R7710.0K
C851000pF
R835.11K 1%
R825.11K 1%
C840.1
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%1%
1%
1%
+ C11047/20VTANT.
+ C9110/35VTANT.
+ C10510/35VTANT.
+ C11410/35VTANT.
+ C7210/35VTANT.
+ C7010/35VTANT.
+ C7110/35VTANT.
+ C8210/35VTANT.
POLY
POLY
R89100
RF_
LVL
RF_LVL
D201N5353B16V
R1102K 2W
DC SUPPLY
VU5
1
2
3SP4
FMWR
1
2
3SP3
FM WR
FMW
R1
2
3
SP2
1
2
3
SP1FM
WR
FSK-R
FM_/LOCK
LOCK
FM_/LOCK
RF OUT
COMPOSITE1
LOC/REMOTE
FSK IN
R71
OPEN
RNOT USED
+12V
VU5
CV1
OUTPUT 8
+VDD 14
GND7
Y1
5V_TCXO
+5V
VU5
FSK
-R
C101100pF
OPEN OPEN OPEN OPEN OPEN
123456789
10
J31
HEADER 10
+5V
TO
FREQ
UEN
CY
SEL
ECTI
ON
PW
ALO
CA
TED
ON
FR
ON
T PA
NEL
J1 O
F 20
1508
F-PW
A
R22410K
R10150KFREQ. ADJ.
OFFSETFREQ. ADJ.
SCH, UNIVERSAL MOTHER BOARD
201497F-SCH A3 3
201497F-SCH A
6-11 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
DW
G.
NO
.R
EV.
1 2 3 4
F
D
E
C
B
A
1 2 3 4
F
D
E
C
B
A
SHEET OFSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV
TITLE:
APPROVALS
DWNCHK
CMPE
DISTRIBUTION
THESE DRAWINGS AND SPECIFICATIONSARE THE PROPERTY OF INTERNATIONALRADIO AND ELECTRONICS CORP. ANDSHALL NOT BE REPRODUCED, COPIED ORUSED AS THE BASIS FOR THEMANUFACTURE OR SALE OF APPARATUSOR DEVICES WITHOUT PERMISSION.
UNCONTROLLED
UNLESS OTHERWISE MARKED IN RED INKBY CM AS A CONTROLLED COPY, COPIESOF THESE DOCUMENTS INCLUDINGASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
A_P_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IRECSIZE
A
12345
SW1
12345
SW3
12345
SW2
12345
SW4
12345
SW5
SER
10
A11
B12
C13
D14
E3
F4
G5
H6
QH
9
CL
K2
QH
7
INH
15
SH/L
D1
U274HC165
SER
10
A11
B12
C13
D14
E3
F4
G5
H6
QH
9
CL
K2
QH
7
INH
15
SH/L
D1
U174HC165
12345678910
RP1100K RPACK
123456789
10
RP2100K RPACK
D11N4148
12345678910
J1
HEADER 5 x 2
+5V
201508F-SCH
SCH, FM FREQUENCY SELECTION
551 1
A
A PRODUCTION RELEASE 03-08-07 DW DW DP
DW 11-14-06
DW 11-14-06
DP 11-14-06
Illustration 6-7 FM Frequency Selection Board (Top-Side)
Illustration 6-8 FM Frequency Selection Board (Bottom-Side)
Schematic Diagram: FM Frequency Selection
Adjustments and Tests 6-12
Illustration 6-9 FM Display Board
6-13 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics DWG. NO. REV.
H
G
F
E
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
H
G
F
E
D
C
B
A
1 2 3 4 5 6 8 9 10 11 12
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED ASTHE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEET OFSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTIONK
SIZE
C
C_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
SWR
50mA
UP
DOWN
SWR
ALC
RF POWER
10V P-P DITHER
PA DC VOLTS
PA DC AMPS
SUPPLY DC VOLTS
"110"
"PILOT"
19.99
19.99
199.9
199.9
199.9
19.99
F.S.DECIMAL POINT
DITHER
L VUR VU
HI GRBR GR
PROC APROC BPROC C
/+6DB/+12DB
L VU
/+6DB
/+12DB
DPM INDPM REF
MON/ST
SWR LAMP
PADC LAMP
LOCK LAMP
+12V
+5V
+5V
+12V
+12V
-12V
5.00V
5.00V
+5V
+12V
5.00V
+5V
+12V
COMPOSITE
+12V
5.00V
-12V
+12V
COMPOSITE
+5V
+12V
+12V
-12V
+12V
-12V
-12V
+12V
VCC
14 16
U10U11
U9
78
VEEVSS
VDD
-12V
STEREO
MONO
MOD. CAL.
1999
FOR BAR
DL36-43
DL21-25
DL1-10
DL48-58
DL26-35
RF LEVEL
5.00V
DL44-47, 59
+12V +12V-12V
5.00V 5.00V
5.00V 5.00V
SEL ASEL BSEL C
+12V
PA TEMPERATURE
19.99VOLTMETER
INPUT
PATEMP LAMP
Pin 1, upper left from front of unit.
LOCK
INPUT
PA DC
PA TEMP
NOTES :
1. ALL RESISTORS ARE IN OHMS, 1/4W, 5% TOL.
2. ALL CAPACITORS ARE IN MICROFARADS.
RED
GRN
GRN
GRN
GRN
GRN
GRN
GRN
RED
C21.0UF
C70.1
C8.001
RED
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
GRN
C110.1
Q32N5210
Q42N5087
C250.1
C301.0UF
C311.0UF
C28
1.0UF
C100.1
GRN
YEL
Y
Y
G
G
G
G
G
G
Y
YEL
D11N4148
D21N4148
3
21
84
U6ATL072
5
67U6B
TL072
3
21
84
U7ATL072
5
67U13B
TL072
C12.001
D61N6263
C221.0UF
C261.0UF
12345678910
11121314151617181920
J1
HEADER 10X2
12345678910
11121314151617181920
J2
HEADER 10X2
RED
SW5
C11.0UF
3
21
84
U1A
TL072
Q1MPS-A56
D51N6263
5
67U7B
TL072
3
21
84
U13ATL072
C13.01
C241.0UF
C291.0UF
C231.0UF
SW6
C20.01
C32.001
C21.01
C33.001
C341.0UF
1 2
JP3JUMPER
SW1DPDT
SW2DPDT
SW3DPDT
GRN
C5.001
C60.1
1 2
JP1OPEN
L11
V-2
V+3
DLO4
IN5
DHI6
ROUT7
RADJ8
MODE9 L10 10
L9 11
L8 12
L7 13
L6 14
L5 15
L4 16
L3 17
L2 18
U2LM3915
R31K
DL44 RED
DL45 RED
R2100K
DL46 RED
R168K
DL47 RED
DL59 RED
R41.2K
R VU
+12V
5.00V
+12V
DL11-20RED
GRN
GRN
GRN
GRN
GRN
GRN
GRN
RED
C41.0
YEL
D31N4148
D41N4148
C31.0
5
67U1B
TL072
Q2MPS-A56
1 2
JP2OPEN
L11
V-2
V+3
DLO4
IN5
DHI6
ROUT7
RADJ8
MODE9 L10 10
L9 11
L8 12
L7 13
L6 14
L5 15
L4 16
L3 17
L2 18
U3LM3915
L1 1
V- 2
V+ 3
DLO 4
IN 5
DHI 6
ROUT 7
RADJ 8
MODE 9L1010
L911
L812
L713
L614
L515
L416
L317
L218
U4LM3914
L1 1
V- 2
V+ 3
DLO 4
IN 5
DHI 6
ROUT 7
RADJ 8
MODE 9L1010
L911
L812
L713
L614
L515
L416
L317
L218
U5LM3914
R18 1.2K
R171K
R1633K
R131K
R14 1.2K
R1533K
R768K
R8100K
R91K
R101.2K
R12330
R111K
R51K
R6330
R315.6K
R32620
R3333K
R345.1K
L11
V-2
V+3
DLO4
IN5
DHI6
ROUT7
RADJ8
MODE9 L10 10
L9 11
L8 12
L7 13
L6 14
L5 15
L4 16
L3 17
L2 18
U8LM3914
R52 5.6K
R27 2.7K
R48 1K
R29680
R433.3M
R471K
R4610M
R45100
R4433K
R2510K
R4910K
R554.7K
R531K
R241M
R2310.0K
R2210.0K
-12V
R2633K
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2828
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
4040
1000 100'S TENS UNITS DL1
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11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2828
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
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+5V
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VE
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GN
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13
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14
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15
VC
C16
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+5V
R30150
C19100PF
R38100K
C180.1
R37470K
C160.1
C170.1
-12V
C271.0UF
DZ16.2V
C140.1
C150.1
R57
1K BECKMAN
1 2U9A
74HC14
CLR14
UP5
DOWN4
LOAD11
CO 12
BO 13
A15 QA 3
B1 QB 2
C10 QC 6
D9 QD 7
U10
74HC193
3 4U9B
74HC14
R4110K
R4210K
R281K
R541K
R40100K
R39100K
R36100K
R35100K
R19510
1213 U9F74HC14
R20220K
C91.0UF
5.00V 5.00V
COMPOSITER VUL VU
+12V-12V
5.00V 5.00V
Vin1
GN
D2
Vout 3
VR17805
+12V
-12V -12V
HI G
R
DITHER
BR
GR
+12V
DP10DP100
+5V
5 6U9C
74HC14
89 U9D
74HC14
1011 U9E
74HC14
R512.2K
UNLESS OTHERWISE SPECIFIED:
Y
G
G
G
G
50mA
D16
1N41
48 D171N4148
D71N4148
MOD. CAL.
D18
1N4148
R56220
+5V
R50100K BECKMAN
SCH, FM/IBOC DISPLAY
DW 09-20-04
G REDRAWN ON IREC FORMAT AND PWB CHG. TO REV. C 09-20-04 DW
1% 1%
336 DW
R580
Q43113-2F H
Q43113-2F H
H PWA, PWB CHG'D TO ROHS 07-24-06 DW475 DW
Schematic Diagram: FM Display
Adjustments and Tests 6-14
Illustration 6-10 FM Voltage Regulator
6-15 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics DWG. NO. REV.
H
G
F
E
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
H
G
F
E
D
C
B
A
1 2 3 4 5 6 8 9 10 11 12
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED ASTHE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEET OFSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTIONK
SIZE
C
C_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
5 6
U3C
74HC14
3 4
U3B
74HC14
CIN11 COUT 9
COUT 10
RST12 Q4 7
Q5 5
Q6 4
Q7 6
Q8 14
Q9 13
Q10 15
Q12 1
Q13 2
Q14 3
VC
C16
GN
D8
U274HC4060
3
21
411
U1A
TL074
12
1314
U1D
TL074
C1.01
C51.0
C3.001
R14.7K
R334.7K
R210.0K
1 2
U3A
74HC14
R34.7K
R410.0K
VDD
C2.001
R7120K
R65.1K
-12V
+12V
R591K
R1075K
C4.001
D31N6263
D41N6263
D21N4148
D11N4148
R851K
R11100K
R13100K
R91.0K
R121.0M
R14220.0
5
67
U1B
TL074
+12V
R152.2K
R1610.0K
R1710.0K
D61N4148
DL2RED
DL1GREEN
10
98
U1C
TL074
R1910.0K
R2010.0K
R18100K
R2124.9K
C61.0POLYPOLY
VDD
12345678910
JP1
HEADER 5X2
D71N4148
INPUT FAULT
D81N4148
R22100K
9 8
U3D
74HC14
13 12
U3F
74HC14
11 10
U3E
74HC14
DZ11N4735
R231.0K
+12V
VDD
VCC
VSS
+6V
C8220pF
C7.001
R25100K
R26100K
R4810.0K
R27620.0
R491.5K
123456
HD1
12
34
56
78
910
1112
1314
1516
1718
1920
HD
2H
EAD
ER 1
0X2
123
HD3
123456
HD4
HEADER 6
VDD VDD
D9OPEN
-12V+12V
CARR SWDRVR V+
R51(JUMPER)
+12V
COMP238KHZ/CARRIER OFF/AUTO CARRIER
SYNC-12VDRVR V+PAVPAIALC
D151N4004
/LOCK FAULT
R50100
INPUT FAULT
+UNREGMETER UNREG
(TO POWER REG. BOARD)
FAN
C92200PfPOLY
GND4
OSC3
+IN2
-IN1 V+ 8
CS 7
C 6
E 5
U4LM3578
ESS4
ERR3
IN2
VCC1 VB 8
OUT 7
CS 6
VS 5
U5IR2125
C11.01
R2868K
C1056PfNPO
R302.2K C13
100Pf
C121.0 C14
.1
D101N4148
Q5MPSA06
DZ21N966B
R24100.0
R3410.0K
+ C23330/100V
Q1IRF540
C150.1 R36
2.0K
R372.2K R38
1.0
D11MUR120
R38A1.0
+UNREG P1
L1380UH
R32SEE NOTE 3
R294.12K
L2960UH
R45
10.K
D131N5822
R441.1K
+
C2410/35V
+
C201800/35V
L3960UH
D141N5822
+ C21220/63V
L4960 uH
+C223300/16V
-12V
+12V
+12V
-12V
+ C18220/63V
DZ3
1.5K
E36A
DZ4ICTE-12
Q2MPSA06
R39
510 R40
10.0Q3
MPSA56
Q4MJE15028
+C191000/35V
C281
R43220.0
R411.0K
R421.0K
+ C25220/63V
DRVR V+
CARR SW
/CARRIER OFF
/AUTO CARRIER
COMP2AUDIO or COMPOSITE
VDD
1%
TIME-OUT SELECT
6.2V
1%
0.5W 0.5W
NOTES:
UNLESS OTHERWISE SPECIFIED:1. ALL RESISTORS ARE IN OHMS, 1/4W, 5% TOL.2. ALL CAPACITORS ARE IN MICROFARADS.3. FOR FM30, 100 & 250 UNITS, R32 VALUE = 82.5K OHM, 1/4W, 1% TOL..
Q43229-6F
PROGRAM DETECT
R3551.0
C26 0.1
C270.1
C16
OPEN
Vin 2
GN
D1
Vout3
VR1 OPEN 1
2
JP2
OPEN
Vin 1
ON/OFF 5
FEEDBACK4
OUT2
GND 3
U6
LM2576-ADJ
FM 30/100/250 = D 6977-9
FM 30/100/250 = C 8667-5
FM 30/100/250 = C 7746-8
1%
1%
1%
.5248
FOR HARRIS UNITS, R32 VALUE = 100K OHM, 1/4W, 1% TOL.
C29
56PfNPO
AF475 REDRAWN ON IREC FORMAT. PWA & PWB NOW RoHS 9-14-06 DW DW DP
DW 9-14-06
SCH, FM VOLTAGE REGULATOR
AG
AG493 CORRECTED PWB TO CONNECT R29 2-19-07 DW DW DP
Schematic Diagram: FM Voltage Regulator
Adjustments and Tests 6-16
Illustration 6-11 FM Power Regulator
6-17 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
DW
G.
NO
.R
EV.
1 2 3 4 7 8
A
B
C
D
E
F
1 2 3 4 6 7 8
A
B
C
E
F
5
THESE DRAWINGS AND SPECIFICATIONS ARE THE PROPERTY OFINTERNATIONAL RADIO AND ELECTRONICS CORP.AND ARE NOT TO BE REPRODUCED, COPIED OR USED AS THE BASISFOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEETSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV.
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTION
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
65
SIZEB
B_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
~
~
- + DC INPUT
TP1
TP2
ON CHASSIS
NOTES:
UNLESS OTHERWISE SPECIFIED:
1. ALL RESISTORS ARE IN OHMS, 1/4W, 5% TOL.
2. ALL CAPACITORS ARE IN MICROFARADS.
533
BATTERY
CIRCUIT BREAKER
110V
DW 09-30-03
R801B
24.9K
R801A27.4K
1 2
Z71 2
Z6
1 2
Z91 2
Z8
12
Z1
12
Z2
R806A330K
R805A330K
R806B
200K
R805B
200K
D8051N4148 R820
100KR80410.0K 1%
1
2
3
D803BYV72EW-150
1
2
3
D804BYV72EW-150
D8021N4148
R811
ESS4
ERR3
IN2
VCC1 VB 8
OUT 7
CS 6
VS 5
U2
IR2125
GND4
OSC3
+IN2
-IN1 V+ 8
CS 7
C 6
E 5
U801
LM3578AN
1
2
3
R80210K
DZ801
1N96
6B 1
6V
DZ8021N966B 16V
1 2Z4
1 2Z5
L801
30UH
L80330UH
L802*
Q801IRF540
R808
1.0K
R80951.0
R8072.2KR80
3
82K
R8102.0K
R812A0.1
R812B0.1
DZ8031N4735 6.2V
R82110.0K
R818A2.0K
R818B2.0K
+C815330/100V
+C816330/100V
+ C817330/100V
+C810
330/100V
+C811
330/
100V
Q804MPSA06
3
26
1 8
74
U803OP-27GNB
Q802MPSA56R814
22.0K
Q8032N5087
R822
22.0K
R8161.0K 1%
R8131.0K
R815100.0
R819.04 OHM 15W 3%
R817B
2K
R817A100
C10010.015F
C802
2200
PF P
OLYC801
220PF
C8141/50V
C804.01C803
56PF
C813.01UF
C819.01UF
C8200.01UF DISK
C809.1
C818.1UF
C805100PF
C8121/50V
C808
.0027
+
C806
4.7UF/63V
123456
HD1
C 7527-2_6 HDR
P801FASTON TAB
P802FASTON TAB
P806FASTON TAB
P803FASTON TAB
P804FASTON TAB
P805FASTON TABP807FASTON TAB
P808
FASTON TABPA-DC OUT
+ UNREG IN
C10582-2C10582-2C10582-2C10582-2
A PRODUCTION RELEASE 10-31-03 DW
R827
1.0K
1 2Z3
DZ8061N4735 6.2V
2W 2W
5W 5W
DZ8071N966B 16V
R82830K
REF DES
FM1UNIT CONFIGURATION
SHORT
FM30 FM100 FM250 FM500
L802
OPENOPEN OPEN OPEN OPEN
OPEN OPEN
SHORT SHORT OPEN OPEN OPENOPEN OPEN SHORT SHORT SHORTSHORT SHORT OPEN OPEN OPENSHORT SHORT SHORT SHORT OPENOPEN OPEN OPEN SHORTOPEN
H43608-1 H43395-5 H43533-1 H43533-1 H43533-1
*
*
**
*
**
*
*
*
*
*
*
2W
**PA VOLTAGE SET
JUMPERZ1
SHORT SHORT SHORTZ2SHORT
Z9 SHORT SHORT SHORT
Z8Z7Z6Z4Z5
Z3 SHORT SHORT SHORT SHORT SHORT
EURO
SHORTOPEN
OPEN
OPEN
OPENSHORT
SHORT
SHORT
SHORT
H43533-1
HARRIS M1
SHORTOPEN
OPEN
OPEN
OPENSHORT
SHORT
SHORT
OPEN
H43533-1R811 5.11K 1%3.3K 3.3K 3.3K3.3K3.3KR827R828DZ806DZ807
OPENOPENOPENOPEN
OPENOPENOPENOPEN
OPENOPENOPENOPEN
OPENOPENOPENOPEN
OPENOPENOPENOPEN
OPENOPENOPENOPEN
INSTALLED3.3K
HARRIS M2
OPENSHORT
OPEN
OPEN
SHORTSHORT
SHORT
OPEN
OPEN
H43533-13.3K
INSTALLEDINSTALLED INSTALLEDINSTALLED INSTALLEDINSTALLED INSTALLED
DW 09-30-03
DP 09-30-03
200915-SCH
DW DP
B CORRECTED Z3 AND Z6 UNIT STATUS FOR M2 AND FM100 01-29-04 DW DW DP274
C SWAPPED Z1, Z2 TO MATCH PWB 08-10-04 DW DW323 DP
FM POWER REGULATOR
200915F-SCH D
D PWA & PWB NOW RoHS. CHG'D P/N 07-25-06 DW DW475 DP
Schematic Diagram: FM Power Regulator
Adjustments and Tests 6-18
R19
Illustration 6-12 FM Power Amplifier FM150/FM300
6-19 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
DW
G.
NO
.R
EV.
1 2 3 4 7 8
A
B
C
D
E
F
1 2 3 4 6 7 8
A
B
C
E
F
5
THESE DRAWINGS AND SPECIFICATIONS ARE THE PROPERTY OFINTERNATIONAL RADIO AND ELECTRONICS CORP.AND ARE NOT TO BE REPRODUCED, COPIED OR USED AS THE BASISFOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEETSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV.
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTION
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
65
SIZEB
B_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
1
2
3
R1110K
R125.6
R135.6
R145.6
R155.6
R1724, 3W
R1610, 1/8W
C14.01
C15.01
C12.01
C13.01
C01.01
C24.68
C23.01
C26.01
C2555pFT21
G2 D2
S
G1 D1
Q01SD2942
PA DC
C220.1
L2150NH
L2250NH
J02BNC RECEPT.
J01BNC RECEPT
T11S
T1111P
C21.01
R01
15K
PA OUTPUT
C10.01R10
12K
R192003W
PA INPUT
DZ106.2V
R182.7K
LB01
BEAD
NOTES:
UNLESS OTHERWISE SPECIFIED:
1. ALL RESISTORS ARE IN OHMS, 1/4W, +/- 5% TOL.
2. ALL CAPACITORS ARE IN MICROFARADS.
3. C10 - C15 = .01 CHIP
4. L21 AND L22 = 8 TURNS CLOSE-WOUND, 3/16 INCH I.D.
C16A
10PFC16
B6.
5-30
pF
C11.01
A PRODUCTION RELEASE 02-20-07 DW DW DP
FM RF AMPLIFIER
201551F-SCH A1
DW
DW
DP
02-20-07
02-20-07
02-20-07
Schematic Diagram: FM RF Amplifier
Adjustments and Tests 6-20
Illustration 6-13 FM Low Pass Filter #2
6-21 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
EP
DW
G.
NO
.R
EV.
1 2 3 4 7 8
A
B
C
D
E
F
1 2 3 4 6 7 8
A
B
C
E
F
5
THESE DRAWINGS AND SPECIFICATIONS ARE THE PROPERTY OFINTERNATIONAL RADIO AND ELECTRONICS CORP.AND ARE NOT TO BE REPRODUCED, COPIED OR USED AS THE BASISFOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEETSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV.
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTION
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
65
SIZEB
B_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
J1RF IN
J2BNC
C1A10pF C1
15.4pFC3
40.9pFC538.9pF
C737.7pF
C914.1pF
C102pF
C1947pF
C1247pF NPO
C130.001uF
C140.01uF C15
.01C160.001uF
C21.35pF
C47.1pF
C69.3pF
C85.13pF
C1147pF NPO
L1OPEN
L290.5nH
L394.1nH
L487.5nH
L577.9nH
D1 1N6263D2
1N6263
12345
HD21X5
R61K
R91K
R720K
R820K
R410
R273.2
R310
R573.2
NOTES:======= UNLESS OTHERWISE SPECIFIED1) ALL RESTORS ARE IN OHMS, 1/4W, 5%
2) ALL CAPACITORS ARE IN MICROFARADS
3) C1-C10 AND C17 ARE CIRCUIT BOARD PADS
FWD
REFL
C173.5pF
C1847pF C20
.01
R1100 R11
100K
R10
10KD3
1N6263
123
HD1
RF MONITOR
Aprox. 7V RMSwith 200w RF in
RFV
RF OUT
4) IF NECESSARY, SELECT R2 FOR SWR READING OF 1.1 OR BETTER WITH 50 OHM LOAD R5 = R2
SHIELD
J REDRAWN 12-05-03 DW
DW 03-14-02
DP
C1-C10 AND C17ARE PWB COPPER AREAS
FM LOW PASS FILTER #2
103209-SCH J
Schematic Diagram: FM Low Pass Filter #2
Adjustments and Tests 6-22
Illustration 6-14 FM RF Driver
6-23 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics
DW
G.
NO
.R
EV.
1 2 3 4 7 8
A
B
C
D
E
F
1 2 3 4 6 7 8
A
B
C
E
F
5
THESE DRAWINGS AND SPECIFICATIONS ARE THE PROPERTY OFINTERNATIONAL RADIO AND ELECTRONICS CORP.AND ARE NOT TO BE REPRODUCED, COPIED OR USED AS THE BASISFOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEETSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV.
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTION
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
65
SIZEB
B_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
L133uH
J1RF IN
L2 OPEN
R1010K
IN1
GN
D2
GN
D3
N/C
4
VC
C5
N/C
6
GN
D7
GN
D8
OU
T9
XU1MHW6342T
R1OPEN
C60.01
C70.01
T1
Q1BLF245
R2
OPEN
C15680pF
L3 C1010pF
C1136pF
C1236pF
C135pF
L410.4uH
L523.2uH
C1427pF
J2RF OUT
C9OPEN
R114.7K
R951
C170.01
+24VDC
C160.01
C18OPEN
1/2W
3
21
84
U2A
OPEN
5
67
U2B
OPEN
R15OPEN
R14
OPEN
G
S
D
1
J3
1
J4
R13OPEN
R12
OPEN
R8*
D31N753A6.2V
DW 08-28-03
533
1
J5
R7
OPEN
C8OPEN
2
1
3
D1OPEN
C1
.01
Vin1
GN
D2
Vout 3
VR1OPEN
R16OPEN
C2OPEN
R4OPEN
R3OPEN
2
1
3
D2OPEN
C3.01
R6OPEN
+5V
R5
OPENC4OPEN
UNLESS OTHERWISE SPECIFIED:NOTE:
1. ALL RESISTORS ARE IN OHMS, 1/4 WATT +/- 5% TOL.2. ALL CAPACITORS ARE IN MICROFARADS.
L6OPEN
R1751
DW 10-30-03DP 10-30-03
C19OPEN
RT12.7K NTCOPEN
T
L7OPEN
C20OPEN
C21OPEN
C22OPEN
R18
0
FM30 FM100 FM250 FM500
R8 POWER LEVEL CONFIGURATION
OPEN 3 OHM 5W 2.7 OHM 5W3 OHM 5W
FOR FM100 AND FM250: 18VFOR FM500: 20VFOR FM30: FEED POINT FROM PWR. REGULATOR PWB.
FOR FM30:20VDC INPUT APPLIED HERE.
C522
C23
.01
C24
.01
ADDED TO PWB (200922-PWB-D IN LOCATIONSHOWN, AND DEPICTED ON COMPONENT MAP.
M PRODUCTION RELEASE 12-10-03 DW DW DP264N XU1 WAS 200479-TERM-10 01-29-04 DW DW MH279O PWB CHG'D TO REV. C 06-14-04 DW DW DP316P PWB CHG'D TO REV. D 03-22-05 DW DW DP361
SCH, FM RF DRIVER
Q43310-4F Q
Q PWA & PWB NOW RoHS. 07-28-06 DW DW DP475
Q43
310-
4FQ
Schematic Diagram: FM RF Driver
Adjustments and Tests 6-24
THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO AND ELECTRONICS CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED AS THE BASISFOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION.
SHEET OFSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REV
TITLE:
DW
G. N
O.
RE
V.
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
UNCONTROLLED
UNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTIONK
1 2 3 4 5 6
D
A A
C
B
D
1 3 4 5 6
ASIZE
2A_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
B4
B3
B2
J1BNC
C1OPEN
123456
J2
HEADER 6
GNDFANTEMP+SENSEV1+V2+
C2.01
C3.01
C4.01
C5.01
PAD
PAD
PAD
PAD
PAD
RF
GND
PAD
PAD
PAD
PADPAD
PADPADPAD PAD
PADPADPAD
SCH, FM EUROAMP DC INPUT FEED THRU
DW 02-07-02
200419-SCH-2.SCH
A PRODUCTION RELEASE 02-19-02 DW160-A
200419-SCH A
Illustration 6-15 FM Euroamp DC Input Feedthru (Top Side)
Illustration 6-16 FM Euroamp DC Input Feedthru (Bottom Side)
Schematic Diagram: FM Euroamp DC Input Feedthru
6-25 FM30/FM150/FM300 User’s Manual
FM30/150/300 User’s Manual
Board Layouts and Schematics DWG. NO. REV. A201232-SCH
H
G
F
E
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
H
G
F
E
D
C
B
A
1 2 3 4 5 6 8 9 10 11 12
E . C . N. REV DESCRIPTIONAPPROVALS
PECHK CMDATE DWNREVISION HISTORY
THESE DRAWINGS AND SPECIFICATIONS ARE THEPROPERTY OF INTERNATIONAL RADIO CORP.AND SHALL NOT BE REPRODUCED, COPIED OR USED ASTHE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS ORDEVICES WITHOUT PERMISSION. SHEET OFSCALE : NONE PROJ NO.FILENAME:
DWG . NO . REVA201232-SCH
TITLE:
UNCONTROLLEDUNLESS OTHERWISE MARKED IN RED INK BY CM AS ACONTROLLED COPY, COPIES OF THESE DOCUMENTSINCLUDING ASSOCIATED ELECTRONIC REPRODUCTIONSARE FOR REFERENCE ONLY.
APPROVALSDWNCHKCMPE
DISTRIBUTIONK
SIZE
C
C_L_SHT1_A.DOT REV. A
INTERNATIONAL RADIO AND ELECTRONICS CORP.25166 LEER DRIVE ELKHART, IN. 46514574-262-8900 WWW.IREC1.COM
IREC
M1H
D-S
RF
POW
ER A
MP
12345
PL1005
PL1001BNC
TOMOTHER BOARD
FAN
RF OUT
PA FAN
RF IN
RF DRIVER VOLTAGE REGULATOR
xxx
HD503
20 C0ND. RIBBONCBL
123
HD703
xxx
HD702
20 C
0ND
. RIB
BO
NC
BL
123456
HD701HEADER 6
1 2 3 4 5 6
HD502
x x x
HD46 C0ND. RIBBONCBL
1
P1+UNREG
1P805
1P804
1 P808PA DC OUT
1 P807GND
123
PL1002
123 PL1004
x x x
HD1
6 C0ND. RIBBONCBL
RF IN
RF OUT
LP FILTER
RF OUT
RF IN
RF OUT
POWER REGULATOR
S1002
S1002
CARRIER
POWER
TOMOTHER BOARD
TOMOTHER BOARD
DRVR V+
12
34
56
78
910
HD505
ONMOTHER BOARD
TEMP SENSE
SCH, FM CHASSIS INTERCONNECT
533
DW 04-04-05
PRODUCTION RELEASEA 04-04-05 DW
120V200V
6.3A
VOLTAGE FUSE SIZE*
120/240 VAC
NOT USED
SEE CHART
50/60HZ
NEUTRAL
HOT
FILTER
*
A
B
C
D
E
F
G
H
tNTC
tNTC
T1001
1P801
R10032K 3W
C100115,000UF/110V
+12V
-12V
1
J4
1 Z3-2
DRVR V+
CB1001CIRCUIT BREAKER
1P803
BATTERY IN
1P802
ON
OFF
ON
OFF
220V240V
3A
220
100
240
120
MOV
MOV
SLO-BLO FOR ALL APPLICATIONS
1 P806GND
+
1
2
3
4
D1001
BRIDGE
DW 04-04-05
DP 06-24-04
DP
CORCOM 6EDL4CM
Schematic Diagram: FM Chassis Interconnect
Adjustments and Tests 6-26
Section 7—Service and Support
We understand that you may need various levels of support or that the product could require servicing at some point in time. This section pro-vides information for both of these scenarios.
Service and Support 7-1
7.1 Service The product warranty (see opposite page) outlines our responsibility for defective products. Before returning a product for repair or replacement (our choice), call our Customer Service department using the following telephone number:
(866) 262-8917 Our Customer Service Representative will give you further instructions regarding the return of your product. Use the original shipping carton or a new one obtained from Crown. Place shipping spacers between the slide-out power amplifier assembly and the back panel. Please fill out the Factory Service Instructions sheet (page 7–5) and include it with your re-turned product. 7.2 24–Hour Support In most instances, what you need to know about your product can be found in this manual. There are times when you may need more in-depth information or even emergency-type in-formation. We provide 24–hour technical assistance on your product via a toll telephone call. For emergency help or detailed technical assistance, call
(866) 262-8917
You may be required to leave a message at this number but your call will be returned promptly from our on-call technician.
7.3 Spare Parts To obtain spare parts, call Crown Broadcast Sales at the following number.
(866) 262-8919
You may also write to the following address:
International Radio and Electronics Corporation
P.O. Box 2000
Elkhart, Indiana, U.S.A. 46515-2000
FM30/FM150/FM300 User’s Manual 7-2
Crown Broadcast Three Year Limited Product Warranty
Summary Of Warranty Crown Broadcast IREC warrants its broadcast products to the ORIGINAL PURCHASER of a NEW Crown Broadcast product, for a period of three (3) years after shipment from Crown Broadcast. All products are warranted to be free of defects in materials and workmanship and meet or exceed all specifications published by Crown Broadcast. Product nameplate with serial number must be intact and not altered in any way. This warranty is non - transferable. This warranty in its entirety is the only warranty offered by Crown Broadcast. No other warranties, expressed or implied, will be enforceable.
Exclusions Crown Broadcast will not warranty the product due to misuse, accident, neglect and improper instal-lation or operation. Proper installation included A/C line surge suppression, lightning protection and proper grounding of the entire transmitter, and any other recommendations designated in the Instruc-tion manual. This warranty does not extend to any other products other than those designed and manufactured by Crown Broadcast. This warranty does not cover any damage to any accessory such as loads, transmission line or antennas resulting from the use or failure of a Crown Broadcast trans-mitter. Warranty does not cover any loss of revenue resulting from any failure of a Crown Broadcast product, act of God, or natural disaster.
Procedure for Obtaining Warranty Service Crown Broadcast will repair or service, at our discretion, any product failure as a result of normal in-tended use. Warranty repair can only be performed at our plant facility in Elkhart, Indiana USA or at a factory authorized service depot. Expenses in remedying the defect will be borne by Crown Broad-cast, including two-way ground transportation cost within the continental United States. Prior to re-turning any product or component to Crown Broadcast for warranty work or repair, a Return Authori-zation (RA) number must be obtained from the Crown Broadcast Customer Service Department. Product must be returned in the original factory pack or equivalent. Original factory pack materials may be obtained at a nominal charge by contacting Crown Broadcast Customer Service. Resolution of the defective product will be made within a reasonable time from the date of receipt of the defec-tive product.
Warranty Alterations No person has the authority to enlarge, amend, or modify this warranty, in whole or in part. This war-ranty is not extended by the length of time for which the owner was deprived the use of the product. Repairs and replacement parts that are provided under the terms of this warranty shall carry only the unexpired portion of the warranty.
Product Design Changes
Crown Broadcast reserves the right to change the design and manufacture of any product at any time without notice and without obligation to make corresponding changes in products previously manufactured.
Legal Remedies of Purchaser This written warranty is given in lieu of any oral or implied warranties not covered herein. Crown Broadcast disclaims all implied warranties including any warranties of merchantability or fitness for a particular purpose.
Crown Broadcast
25166 Leer Drive Elkhart, Indiana 46514-5425, Phone: (574) 262-8900, Fax: (574) 262-5399 www.crownbroadcast.com
Service and Support 7-3
The following lists describe the spare parts kit available for your transmitter.
For the FM150 and FM300, use part number GFMSPARES. The following parts are included: These parts are included in the FM30 kit (part number GFM30SPARES):
Item Quantity Fuse, 1.5A Slo-blo 5mmX20mm 6 Fuse, 3A Slo-blo 5mmX20mm 5 15A 100V N-CH MOSFET 2 130V RMS 200V PEAK 6500A ZENER 2
35A 400V Bridge Rectifier 1 Diode, BYV72E–150 20A 150V 2 MOS Gate Driver, 500V IR #IR2125 2 BLF245 FET PWR Transistor 1 Switching Regulator, 0.75A LM3578AN
2
NTC, In-rush Current Limiter 2 EMI Filter, 6A 250V with Fuse 1 14 Stage Bin Cntr/OSC 74HC4060 1
Item Quantity Fuse, 4A Slo-blo 5mmX20mm 6 Fuse, 6.3A Slo-blo 5mmX20mm 5 Fuse, 12.5A Slo-blo 5mmX20mm 5 15A 100V N-CH MOSFET 2 130V RMS 200V PEAK 6500A ZENER 2
35A 400V Bridge Rectifier 1 Diode, BYV72E–150 20A 150V 2 MOS Gate Driver, 500V IR #IR2125 2 MOSFET, RF SD2942 1 Switching Regulator, 0.75A LM3578AN 2
NTC, In-rush Current Limiter 2 EMI Filter, 6A 250V with Fuse 1 14 Stage Bin Cntr/OSC 74HC4060 1
FM30/FM150/FM300 User’s Manual 7-4
Factory Service Instructions
To obtain factory service, complete the bottom half of this page, include it with the unit, and ship to:
International Radio and Electronics Corporation 25166 Leer Drive
Elkhart, Indiana, U.S.A. 46514-5425
For units in warranty (within 3 years of purchase from any authorized Crown Dealer): We pay for ground UPS shipments from anywhere in the continental U.S. and Federal Express Second Day service from Hawaii and Alaska to the factory and back to you. Expedited service/shipment is available for an additional charge. You may forward your receipt for shipping charges which we will reimburse. We do not cover any charges for shipping outside the U.S. or any of the expenses involved in clearing customs. If you have any questions about your Crown Broadcast product, please contact Crown Broadcast Customer Service at:
Telephone: (866) 262-8917 or (866) 262-8919 Fax: (574) 262-5399
Name: Company: Shipping Address: Phone Number: Fax: Model: Serial Number: Purchase Date:
Nature of the Problem (Describe the conditions that existed when the problem occurred and what attempts were made to correct it.) Other equipment in your system: If warranty has expired, payment will be: Cash/Check VISA Mastercard
Please Quote before servicing
Card Number: Exp. Date: Signature: Return Shipment Preference if other than UPS Ground: Expedite Shipment Other
ENCLOSE WITH UNIT—DO NOT MAIL SEPARATELY
Service and Support 7-5
Appendix
Transmitter Output Efficiency
RF Power Output-FM 30
PADC Volts PADC Amps RF Power Efficiency
27.9 2.16 34 56
26.2 2.09 32 58
24.7 2.02 30 60
22.5 1.91 26 60
20.2 1.77 22 62
17.0 1.56 17 64
14.1 1.34 14 74
12.6 1.22 10 65
10.5 1.04 7 64
8.8 .88 5 65
6.6 .65 3 70
5.4 .53 2 70
Power measurements were made at 97.1 MHz. Voltage and current measurements were taken from the unit’s built-in metering. The accuracy of the internal metering is better than 2%. Return loss of the RF load was greater than –34 dB at test frequency .
FM30/FM150/FM300 User’s Manual A-1
Transmitter Output Efficiency
RF Power Output-FM 150
PADC Volts PADC Amps RF Power Efficiency 34.3 6.05 165 79.5 32.8 5.87 150 77.9 28.4 5.34 113 74.5 23.1 4.77 75 68.1 16.4 4.09 38 56.7 9.4 3.16 15 50.5
Power measurements were made at 97.9 MHz. Voltage and current measurements were taken from the unit’s built-in metering. The accuracy of the internal metering is better than 2%. Return loss of the RF load was greater than –34 dB at test frequency .
RF Power Output-FM 300
PADC Volts PADC Amps RF Power Efficiency 48.5 7.86 330 86.6 46.3 7.57 300 85.6 40.2 6.75 225 82.9 33.0 5.80 150 78.4 23.4 4.70 75 68.2 14.5 3.79 30 54.6
Power measurements were made at 97.9 MHz. Voltage and current measurements were taken from the unit’s built-in metering. The accuracy of the internal metering is better than 2%. Return loss of the RF load was greater than –34 dB at test frequency .
Appendix A-2
Notes:
FM30/FM150/FM300 User’s Manual A-3
Glossary
The following pages define terms and abbreviations used throughout
this manual.
Glossary G-1
AF Audio Frequency; the frequencies between 20 Hz and 20 kHz in the electromagnetic spectrum ALC Automatic Level Control AM Amplitude Modulation; the process of impressing information on a radio-frequency signal by varying its amplitude. Bandwidth The range of frequencies available for signaling. BCD Binary-Coded Decimal; a digital system that uses binary codes to represent decimal digits. BFO Beat Frequency Oscillator BNC A bayonet locking connector for miniature coax; said to be short for Bayonet-Neill-Concelman. Broadband As used in the FM transmitter; refers to the entire audio spectrum as opposed to the spectrum influenced by the pre-emphasis; also called “Wideband”. Carrier A continuous signal which is modulated with a second; information– carrying signal. Crosstalk In FM broadcasting, the term generally refers to the interaction between the main (L+R) and the subcarrier (L_R) signals as opposed to “separation” which generally refers to leakage between left (L) and right (R) channels. Density (program) A high average of modulation over time. Deviation The amount by which the carrier frequency changes either side of the center frequency. DIP Dual In-line Pins; term used to describe a pin arrangement. Distortion The unwanted changes in signal wave shape that occur during transmission between two points. DPM Digital Panel Meter EPROM Erasable Programmable Read Only Memory Exciter (1) A circuit that supplies the initial oscillator used in the driver stage. (2) A transmitter configuration which excludes stereo generation and audio processing.
FM30/FM150/FM300 User’s Manual G-2
FET Field-Effect Transistor Frequency Synthesizer A circuit that generates precise frequency signals by means of a single crystal oscillator in conjunction with frequency dividers and multipliers. FM Frequency Modulation; the process of impressing on a radio signal by varying its frequency. FSK Frequency Shift Keying; an F technique for shifting the frequency of the main carrier at a Morse code rate. Used in the on-air identification of frequencies. Gain Reduction The process of reducing the gain of a given amplifier. Harmonics Undesirable energy at integral multiples of a desired, fundamental frequency. High Frequency Frequencies in the 3.0 to 30.0 MHz range. Highband Frequencies affected by the pre-emphasis. I/O Input/Output LED Light Emitting Diode Modulation The process by which a carrier is varied to represent an information-carrying signal. MOSFET Metal Oxide Semiconductor Field Effect Transistor; A voltage-controlled device with high input impedance due to its electrically isolated gate. Nearcast A transmission within a localized geographic area (ranging from a single room to several kilometers) PA Power Amplifier PAI Power Amplifier Current PAV Power Amplifier Voltage Pilot A 19-kHz signal used for stereo transmissions. Pre-emphasis The deliberate accentuation of the higher audio frequencies; made possible by a high-pass filter. Processing The procedure and or circuits used to modify incoming audio to make it suitable for transmission. Receiver An option which adds incoming RF capability to an existing transmitter. See also “Translator.”
Glossary G-3
RF Radio Frequency; (1) A specific portion of the electromagnetic spectrum between audio-frequency and the infrared portion. (2) A frequency useful for radio transmission (roughly 10 kHz and 100,000 MHz). SCA Subsidiary Communications Authorization; see “subcarrier.” S/N Signal to Noise Spurious products Unintended signals present on the transmission output terminal. Stability A tolerance or measure of how well a component, circuit, or system maintains constant operating conditions over a period of time. Stereo Pilot See “Pilot.” Stereo separation The amount of left channel information that bleeds into the right channel (or vice versa). Subcarrier A carrier signal which operates at a lower frequency than the main carrier frequency and which modulates the main carrier. Suppression The process used to hold back or stop certain frequencies. SWR Standing Wave Ratio; on a transmission line, the ratio of the maximum voltage to the minimum voltage or maximum current to the minimum current; also the ratio of load impedance to intended (50 ohms) load impedance. THD Total Harmonic Distortion Translator A transmitter designed to internally change an FM signal from one frequency to another for retransmission. Used in conjunction with terrestrial networks. Satellator A transmitter equipped with an FSK ID option for re-broadcasting a satellite fed signal. VSWR Voltage Standing Wave Ratio; see “SWR.” Wideband See “Broadband.” VCO Voltage Controlled Oscillator
FM30/FM150/FM300 User’s Manual G-4
Index Symbols 19–kHz level adjustment 5–3 phase adjustment 5–3 A AC. See Power: input ALC 3–3,3–7,4–7 Altitude operating range 1–8 Amperes PA DC 3–3,3–8 Amplifier RF 4–13 bias set 5–6 Antenna 2–12 mismatch 3–3 Applications 1–3 Audio broadband 3-5 distortion 5–9 frequency 5–8 high 3–5 input connectors 2-13, 4–3 input level 1-7, 3–5 monitor connections 2–15,4–5 performance 5–7 pre-emphasis 3–5 processing 3–5,4–10 wide 3–5 Audio processor 4-3 adjustments 5–2 circuit description 4–3 circuit location 6–3 indicators 3–5 input 3–5 reference drawings 6–5 B Backup transmitter use 1–4 Bandwidth RF 5–8 Battery. See power: input Bias set 5–6 Broadband. See Audio: broadband
C Cables audio input 2–13 Carrier 4–12,5–8 automatic turnoff 2–16,3–8,5–6,5–10 frequency 5–8, 5-10 Carrier switch 3–4,5–5 Channel. See Frequency main 5–10 main into sub 5–10 sub into main 5–10 Chassis circuit 4–14 Circuit boards audio processor 4–3,6–5 stereo generator 4–4, 6-5 Circuits chassis 4–14 display 4–10 metering 4–8 motherboard 4–8 part numbering 4–2 power regulator 4–12 RF exciter 4–6 stereo generator 4–4 voltage regulator 4–11 Components numbering 4–2 Composite input 2–14 input connection 2–13 output adjustment 5–3 Connectors audio input 2–13 audio monitoring 2–15 composite in 2–15 remote I/O 2–16 RF input 2–12 RF output 2–12 RF output monitoring 2–12 SCA In 2–14 XLR 2–13, 4–3 Cooling Fan 3-3, 3-8 control 4-7 Coverage area 1-4 Crosstalk 1-7 measurements 5-9 Current limit PA 5-5
I-1 Index
D DC. See Power: input De-emphasis 2-15, 5-2, 5-7 jumpers 2-15 Delay program failure to carrier turnoff 2-16, 5-6 Dimensions 1-9 Display circuit description 4-10 front panel 3-2, 3-5, 3-7 modulation calibration 5-5 Distortion 1-7 audio 5-9 harmonic 4-5 E Emissions 5-8 Exciter. See RF exciter configuration 1-4 F Fan (PA) control 4-7 cooling 3-8 Fault indicators 4-10 input 3-8 lock 3-8 power 3-8 servicing 3-8 SWR 3-8 temperature 3-8 FCC guidelines 1-9, 5-8, 5-10 Frequency carrier 5-8, 5-10 measurement 5-4 pilot 5-8 receiver 2-8 response 5-8 selection 2-5, 5-3 receiver 2-8 samples 2-6 synthesizer 5-10 Frequency synthesizer. See RF exciter adjustments 5-4 Front panel display modulation calibration 5-5 FSK 1-5, 1-6 measurements 5-4 Fuses 2-4, 7-4 G Gain control 3-5
Gain reduction 4-3 Gain switches input 3-6 H Harmonic distortion 4-5 Harmonics 5-8 Heatsink 3-8 Highband 3-5 processing 4-4 Humidity operating range 1-8 I I/O connector 1-2, 2-14 pin out 2-16, 2-17 Indicators audio processor 3-5 fault 3-8, 4-10 highband 3-5 LED 3-5, 3-7, 4-10 pilot 3-5 wideband 3-5, 5-6 Input audio connectors 2-13 composite 2-14 fault 3-8 gain switches 3-6 program fault 2-16 SCA connection 2-14 L Labels 1-10 LEDs 3-5, 4-10 Line voltage 2-2, 2-3 Lock status 4-6 Lock fault 3-8 M Metering 1-3 circuit description 4-7 Metering circuit adjustments 5-4 location 4-7 Modulation 2-12, 3-5, 5-3, 5-7, 5-8 calibration 5-5 compensator 2-7 display 3-5 percentage 3-5, 5-9 Monitor audio 2-15, 4-5
FM30/FM150/FM300 User’s Manual I-2
M (continued) Mono operation 2-13, 3-6 Motherboard circuit description 4-8 Multimeter 3-7 front panel 3-3 N Nearcast transmitter use 1-6 Networks satellite fed 1-6 terrestrial fed 1-5 Noise 1-8, 3-8 measurements 5-9 O Operating environment 1-8, 2-2 Options 1-3, 1-4, 1-6 Output power 1-7, 3-7 display 3-7 Output filter 4-14 P Part numbering 4-2 Parts spares 7-2 Performance checklist 5-7 tests 5-10 Pilot frequency 5-8 Pilot indicator 3-5 Power AC supply 4-14 AC voltage selection 2-2 battery 1-4, 1-8, 2-5 failure 2-2 fault 3-8 input 1-8, 2-2, 2-5 FCC guidelines 5-10 output 1-3, 1-7, 5-8 display 3-7 output filter 4-14 regulator circuit description 4-12 RF 3-3, 3-7 RF amplifier 4-13 transformer 4-14 Power switch 3-4 Pre-emphasis 1-7, 4-4, 5-2, 5-7 curve 2-15, 4-4
Processing audio 1-2, 3-5 control 3-6 control setting 3-3 highband 3-5, 4-4 Program failure 2-16, 5-10 Program source 2-13, 3-6 R Receiver frequency selection 2-8 option 1-5 specifications 1-10 Reflectometer 4-14 Regulatory approvals 1-9 Remote control 1-2 Remote I/O connector 2-16 pin out 2-17 Remote operation 2-16 Repair warranty 7-3 RF amplifier 4-13 bias set 5-6 bandwidth 1-8, 5-8 exciter 1-3, 2-12 circuit description 4-6 circuit location 1-3, 4-6 input 1-5, 2-12 output 1-2, 1-5, 1-7, 3-3, 3-7 impedance 1-7 output filter 4-14 S Safety 1-10 Satellator transmitter use 1-6 SCA 1-5 input connection 2-14 Sensitivity monaural 1-10 stereo 1-10 Separation stereo 1-7 stereo generator 5-2 Service warranty 7-3 Service instructions 7-5 Spares kit 7-4 Specifications receiver 1-10 transmitter 1-7
I-3 Index
S (continued) Stand alone transmitter use 1-4 Stereo separation 1-7, 5-9 Stereo generator 1-2, 2-14 adjustments 5-2 bypassing 2-14 circuit description 4-4 circuit location 6-3 Subcarrier 5-10 38kHz 5-10 Suppression subcarrier 1-8 Switches carrier 3-3, 3-4, 5-5 input gain 3-5, 3-6 power 3-2, 3-4 receiver 2-8 stereo-mono 3-3, 3-6 SWR 3-7 calibrate 5-5 fault 3-8 Synchronization 4-11 Synthesizer, See RF exciter T Temperature fault 3-8 operating range 1-8, 5-10 PA 3-3, 3-8 Test point voltage 3-8 Tests performance 5-7, 5-10 Time-out program input failure 2-16 Transformer 4-14 Translator transmitter use 1-5 V VCO 4-6 Voltage AC selection 2-2 Voltage regulator 3-8 adjustments 5-6 circuit description 4-11 Voltage selection 2-2 Voltmeter display 3-8 Volts PA DC 3-3, 3-8
VSWR 1-2, 2-12 W Warranty 7-3 Weight 1-9 Wideband 3-5 X XLR connectors 2-13
FM30/FM150/FM300 User’s Manual I-4