STC Keltec 84 Hill Ave. Ft. Walton Beach, Florida

32548 (850) 244-0043

Technical Manual Model A500, A600, A610 SerieslPage 1-1

SECTION 1.. INTRODUCTION

INTRODUCTION

1.0 Scope of Manual

1.2 This manual contains instructions for the use and maintenance of the Model A500, A600, A610 Series Traveling'Wave Tube (TWT) Amplifiers. This manual includes a general description of the amplifier, operating instructions, theory of operation, maintenance information, drawings .and parts list.

Purpose and Use of Equipment

1.3.1 The A500, A600, A610 Series Traveling Wave Tube Amplifiers are used to linearly amplify microwave signals over the operating bandwidth of the TWT. Typical applications are: general laboratory installation to increase dynamic range measurements, interference studies, and as part of radar and communication systems.

1.4 General Description

1.4.1 The A500, A600, A610 Series Traveling Wave Tube Amplifiers are completely self contained and are suitable for operation on a bench top or in a relay rack.

The A500, A600, A610 Series TWT amplifiers are operated from a 1201208 VAC +I-lo%, three-phase, 50160 Hz line (400 Hz optional). The amplifier consists of front and rear panels, two equipment decks, internal- TWT, frame ' and cover. The front panel serves as a mounting for the controls, monitor meters and fault indicators. The covers enclose and protect the' internal components of the equipment.

Technical Manual Model A500, A600, A610 SeriesIPage 1-2

1.5 Equipment Specifications

1.5.1 Table 1-1 lists the equipment specifications for Model A500/A600/610 Series.

Table 1-1 Specifications

A600 Series

Electrical

Freq. Min. Power Min. Sat. Range Out Gain

Model # GHz Watts dB

Spurious : InputIOutput Impedance: Load VSWR: InputIOutput Connectors:

200 30 200 40 200 4 0 200 40 350 4 0 200 4 0 200 4 0 200 4 0 150 40 200 3 8 150 3 5 200 3 0 200 30

Extra Power A610 Series

Max. N.F. dB

Less than -40 dBc at rated output. 50 ohms, VSWR 2.5:l max. 2.5:l Max. Type "N" to 8.0 GHz, Type "SMAIWaveguide" above 8.0 GHz. Output Waveguide: "A600/X, WR-90" Output Waveguide: "A600/U, WR-62" Output Waveguide: "A6OO/IJ, WRD750"

Technical Manual Model A500, A600, A610 SeriesIPage 1-3

Table 1-1. Specifications, Cont.

General

Power : Dimensions:

Weight : Cooling : Warranty:

Environmental

Operating Temperature: Relative Humidity: Altitude:

208V +/-lo%, 50-60 Hz, 3 Phase, 2.6 KW Max. 14Hn x 19W" x 25"D (35.6 Cm. x 48.3 Cm. x 63.5 Cm.) Except A600/P, A600/L and A610lLS. (See Figure 2-1)

175 pounds maximum, 79.5 Kg. Internal Forced Air One full year from date of shipment, non-pro- rated for both the TWT and power supply.

OOC to 50°C 95% (Noncondensing) 10,000 ft.

Remote O~eration (Standard)

Allows,amplifier to be monitored and operated from a second location through a rear mounted connector (Option 10) .

Selected Options

In 'addition to the normally supplied features, there are several options available to enhance the operation of the amplifier. The options are as follows:

Option 03 VSWR Cutout (Protects TWT against RF mismatch)

Option 04

Option 07

Option 09

220V +/-lo%, AC Power (or 240V, if requested)

Pulse Modulation, Pin Diode Modulation with 40 dB Isolation; 15 nsec Rise/Fall Times

Integral Input Isolator

Option 10-1 IEEE 488 GPIB programmability

Technical Manual Model A500, A600, A610 SeriesIPage 1-4

Table 1-1. Specifications, Cont.

Selected Options, Continued

Option 12

Option 13

Option 14

Option 15

Option 16

Option 18

RF Sample of the output (-50 dBc)

Slide Adapter Plates and slides for racking the amplifier in a standard 19 inch rack

Internal preamplifier to generate specified power output from a 0 dBm source.

Pin Diode Attenuator at the input to the TWT; 20 dB range.

Remote Control Panel

InputIOutput connector on rear panel

STC Keltec 84 Hill Ave. Ft. Walton Beach, Florida

32548 (850) 244-0043

Technica l Manual Model A500/A600/A610 Series/Page 2-1

SECTION 2. OPERATING INSTRUCTIONS

2.0 OPERATING INSTRUCTIONS

General

The Travel i n g Wave Tube Amp1 i f i e r (TWTA) i s shipped complete and ready t o operate. No speci a1 o r permanent i n s t a l 1 a t i on procedures are requ i red . The TWTA should be unpacked upon r e c e i p t , observ ing t h e usual . p recau t i ons customary when unpacking an e l e c t r i c a l inst rument .

I n s t a l 1 a t i o n

2.3 A f t e r unpacking t h e TWTA, p l a n i t s i n s t a l l a t i o n . The space r e q u i r e d i s shown i n F igu re 2-1, Out1 i n e Dimensions Drawing. The f r o n t panel c o n t r o l s and i n d i c a t o r s a re shown i n F igu re 2-2, F ron t Panel Con t ro l s and I n d i c a t o r s . A lso i nc luded i n F igu re 2-2 a r e t h e r e a r panel c o n t r o l , power and RF connectors. The a i r i n t a k e i s through t h e f r o n t panel and t h e exhaust i s o u t t h e r e a r panel. A l l o w s u f f i c i e n t room f o r adequate a i r f l o w and easy access t o t h e remote c o n t r o l and RF connectors.. Table 2-1 de l i nea tes t h e c o n t r o l s and i n d i c a t o r s .

2.3.1 The TWTA's AC pr imary i n p u t power i s 120/208 v o l t s , t h r e e phase, 50/60 Hz and has a f i v e (5) w i r e i n p u t connector. Suppl ied w i t h t h e a m p l i f i e r i s a f i v e (5) w i r e cab le w i t h connectors, w i red t o conform t o OSHA standards.

2.4 Operat ing Procedures

2.4.1 The ope ra t i ng procedures f o r t h e TWTA are descr ibed i n paragraphs 2.6 through 2.6.7.

Operat ing Cont ro l s, I n d i c a t o r s and Connectors

2.5.1 The ope ra t i ng c o n t r o l s , i n d i c a t o r s and connectors o f t h e TWTA a r e l o c a t e d on t h e f r o n t and r e a r panel and a re 1 i s t e d i n Table 2 -1 and shown i n F igu re 2-2.

Connections and P re l im ina ry Operat ion

2.6.1 P r i o r t o per fo rming any ope ra t i on t o t h e TWTA, p lace ALL c o n t r o l s i n t h e f o l l o w i n g p o s i t i o n s .

AC Power Breaker - OFF AC Power Swi tch - OFF Local/Remote Swi tch - LOCAL Standby/RF On - STANDBY

18.00' (RACK MTQ) (48.2BCM) 1

4.000 RF CONNECTORS (lO.l8CM,

A500/600/610 Series Page 2-2

In 28:44 ' ;'Tm g' J L . . < 26.12 28.82 (76.2SCM) MAX (72.24CM)

(83.80CM)

RUT

R U T , PWR

REAR VlEW

J PWR '

1 1.484 1 i:%s,

RF CONNECTORS ' REAR VlEW

(3.77CM) ASOO. A600, A610. A620

FIGURE 2-1 ASOO, A600, A610 OUTLINE DIMENSIONS . ' _ . . .

13.88

(36.26CM)

(RMR PANEL)

13.88

(3696CM)

(REAR PANEL)

26 --"--- /

27

2 5

/' P

A'

/-

,-'

23

22 R E A R PANEL FIGURE 2-2

A500, A600, A6 10 SERIES

Technical Manual Model A500/A600/A610 Ser i es/Page 2-4

able 2-1. Front and Rear Panel Indicators, Controls and Connectors

Front Panel I nd i ca to rs , Contro l s and Connectors

Inpu t AC Power Main Breaker Local -Remote Se lec to r Switch Power On sw i t ch Standby RF On Switch A i r In take, TWT Cool ing C o l l e c t o r Current Meter H e l i x Current Meter F a u l t Reset Switch' Power On I n d i c a t i n g Lamp Standby I n d i c a t i n g Lamp RF On I n d i c a t i n g Lamp He1 i x F a u l t Lamp TWT Thermal F a u l t Lamp Power Supply Thermal F a u l t Lamp A i r F a u l t Lamp VSWR F a u l t Lamp Amp1 i f i e r RF Gain Contro l RF I n p u t RF Output RF Sample

Rear Panel

Not Used Remote Contro l Connector & switches Three Phase, 120/208 V o l t AC Input, Connectors RF I n p u t (Option 18) RF Sample (Option 18) RF Output (Option 18) A i r Exhaust A i r Exhaust