Nera Citylink Technical Discription.pdf

L.nr. 29059 Rev. E 99.04.28 RE/Irg CityLink 1

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1.1 REFERENCES............................................................................................................................... .......................41.2 TERMINOLOGY ..................................................................................................................................................51.3 NETWORK AND SYSTEM OVERVIEW ...................................................................................................................6

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2.1 FREQUENCY BANDS AND CHANNEL ARRANGEMENTS.........................................................................................72.2 SYSTEM CONFIGURATIONS.................................................................................................................................7

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2.3 INSTALLATION ...................................................................................................................................................92.4 SAFETY CONDITIONS..........................................................................................................................................92.5 ENVIRONMENTAL CONDITIONS ..........................................................................................................................92.6 ELECTROMAGNETIC COMPATIBILITY CONDITIONS (EMC).................................................................................92.7 EQUIPMENT TYPE APPROVAL .............................................................................................................................92.8 MECHANICAL CHARACTERISTICS.......................................................................................................................92.9 SYSTEM SYNCHRONISATION ............................................................................................................................102.10 CONTROL AND SUPERVISION FACILITIES......................................................................................................102.11 POWER SUPPLY............................................................................................................................................102.12 LOOPBACKS ................................................................................................................................................112.13 MS-AIS INSERTION.....................................................................................................................................112.14 SYSTEM PERFORMANCE ..............................................................................................................................12

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2.15 SYSTEM RELIABILITY...................................................................................................................................13 0HDQ7LPH%HWZHHQ)DLOXUH07%)

2.16 INTERFERENCE SENSITIVITY ........................................................................................................................13 &RFKDQQHOLQWHUIHUHQFHVHQVLWLYLW\ $GMDFHQWFKDQQHOLQWHUIHUHQFHVHQVLWLYLW\

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3.1 IF & DC-INTERFACE TO BRANCHING UNIT.......................................................................................................143.2 RF-INTERFACE TO BRANCHING UNIT................................................................................................................143.3 RF-INPUT MONITORING....................................................................................................................................143.4 SPURIOUS EMISSIONS .......................................................................................................................................143.5 TRANSMITTER CHARACTERISTICS ....................................................................................................................15

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3.6 RECEIVER CHARACTERISTICS...........................................................................................................................17 5HFHLYHUWKUHVKROG

CityLink L.nr. 29059 Rev. E 99.04.28 RE/Irg2

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4.1 GENERAL DESCRIPTION....................................................................................................................................184.2 INTERFACE TO ANTENNA FEEDER SYSTEM .......................................................................................................184.3 INTERFACE FOR COAXIAL CABLE TO IDU.........................................................................................................184.4 RF - FILTER USABLE BANDWIDTH AND TYPICAL LOSSES ..................................................................................18

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6.1 MODULATOR CHARACTERISTICS......................................................................................................................206.2 DEMODULATOR CHARACTERISTICS..................................................................................................................206.3 CHARACTERISTICS OF SIGNALS TRANSMITTED BETWEEN IDU AND ODU ........................................................20

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7.1 SECTION OVER HEAD (SOH)...........................................................................................................................21 )UDPHZRUGDQGSDULW\E\WHV 0HGLDVSHFLILFE\WHV 2WKHU62+E\WHV

7.2 SCRAMBLING / DESCRAMBLING FUNCTIONS.....................................................................................................227.3 TRANSMISSION INTERFACES ............................................................................................................................22

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7.4 64KB/S AND WAYSIDE CHANNELS ....................................................................................................................23 *HQHUDO 0EVZD\VLGHFKDQQHOFKDUDFWHULVWLFV NEVFKDQQHOFKDUDFWHULVWLFV

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8.1 GENERAL............................................................................................................................... ..........................248.2 INTERFACES TO THE SUPERVISION SYSTEM ......................................................................................................24

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/LVWRIILJXUHV 3DJHFigure 1-1: Principle block diagram for a radio system.............................................................................. 6Figure 2-2: 1+0 system overview ................................................................................................................ 7Figure 2-1: Hot standby system overview................................................................................................... 8Figure 2-2: Configuration examples............................................................................................................ 8Figure 2-3: Looping of main data.............................................................................................................. 11Figure 3-4: RF spectrum mask, 18 GHz band ............................................................................................ 16Figure 3-5: RF spectrum mask, 23 and 25 GHz bands, 56MHz chan. spacing.......................................... 16Figure 8-1: "Current loop" alarm input interface ...................................................................................... 26

$SSHQGL[Appendix A: Channel arrangement ........................................................................................................... 28Appendix B: Alarm List ............................................................................................................................ 30Appendix C: Overview standard/optional features ................................................................................... 32


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The CityLink is a compact SDH radio-relay equipment designed for transmission of STM-1 capacityprimarily for applications in urban areas. The CityLink is designed for split-mount installations with allRF modules contained in the Outdoor Unit (ODU) and mounted on the back of or nearby the antenna.The Indoor Unit (IDU) containing the baseband and modem circuitry, fits both ETSI and 19” standardracks.The following specifications apply to the CityLink operating in 18, 23 and 25GHz frequency bands withapproximately 55MHz channel spacing.

5HIHUHQFHV1. (76: Radio Equipment and Systems (RES); Electro Magnetic Compatibility (EMC)

standard for digital fixed radio links and ancillary equipment with data rates at around 2 Mbit/sand above.

2. (76 Equipment Engineering (EE); Environmental conditions and environmental testsfor telecommunications equipment

3. (76: Equipment Engineering (EE); Power supply interface at the input totelecommunication equipment; Part 1: Interface operated by Direct Current (DC)

4. SU(1 Transmission and Multiplexing (TM) High capacity digital radio-relay systemscarrying 1 x Synchronous Transport Module-level 1 (1 x STM-1) signals operating in the18GHz frequency band with channel spacing of 55MHz

5. SU(1 Transmission and Multiplexing (TM); Parameters for radio relay systems forthe transmission of digital signals and analogue video signals operating at 23GHz.

6. SU(1 Transmission and Multiplexing (TM); Digital fixed point-to-point radio linkequipment operating in the frequency range 24,25 GHz to 29,50 GHz.

7. ,7855HF) Radio-frequency channel arrangements for radio-relay systems operatingin the 18 GHz band

8. ,785) Radio-frequency channel arrangements for radio-relay systems operating in the23 GHz band

9. ,785) Radio-frequency channel arrangements for radio-relay systems operating in the25, 26 and 28 GHz bands

10. (1 Safety and requirement for radio transmitting equipment11. (1 Safety of laser products. Part 1: Equipment classification, requirements and user’s

guide.12. (1 Safety of laser products. Part 2: Safety of optical fibre communication systems.13. ,7855HF)Architectures and Functional Aspects of Radio-Relay Systems for SDH-

Based Networks14. ,7875HF*Physical/Electrical Characteristics of Hierarchical Digital Interfaces.15. ,7875HF*Digital Transmission Systems - Terminal Equipment - General16. ,7875HF*Characteristics of Synchronous Digital Hierarchy (SDH) Equipment

Functional Blocks.17. ,7875HF*The Control of Jitter and Wander within Digital Networks which are based

on the 2048 kbit/s Hierarchy.18. ,7875HF*Error Performance Parameters and Objectives for International, Constant

Bit Rate Digital Paths at or above the Primary Rate.19. ,7875HF*Digital Sections based on the 2048 kbit/s hierarchy.20. ,7875HF*Optical Interfaces for Equipment and Systems Relating to the Synchronous


Digital Hierarchy.21. ,7875HF*Digital Line Systems based on the Synchronous Digital Hierarchy for use

on Optical Fibre Cables.22. (76 “Equipment Engineering (EE); European telecommunications standards for

equipment practice”.23. ,(& Dimensions of mechanical structures of the 486.6mm (19in) series: Cabinet and

pitches of the rack structures”.24. ,(& Dimensions of mechanical structures of the 486.6mm (19in) series: Subrack and

associated plug in units”.25. ,((( Carrier Sense Multiple Access with Collision Detection

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$'0 Add/Drop/Multiplex$,6 Alarm Indication Signal

$6,& Application Specific Integrated Circuit$7'( Adaptive Time Domain Equaliser$73& Automatic Transmitter Power Control

$8 Administrative Unit$8* Administrative Unit Group%(5 Bit Error Rate%,3 Bit Interleaved Parity& Container

'&& Data Communications Channel(&& Embedded Control Channel(0& ElectroMagnetic Compatibility(: Early Warning),5 Finite Impulse Response

+%(5 High Bit Error Rate,'8 InDoor Unit

/%(5 Low Bit Error Rate/&7 Local Craft Terminal/2) Loss Of Frame/26 Loss Of Signal0/0 Multi-Longitudinal Mode06 Multiplex Section

062+ Multiplex Section Overhead063 Multiplex Section Protection067 Multiplex Section Termination

07%) Mean Time Between Failure1(: Nera Element vieW

1(:106 Nera Element vieW.- Network Management System; Element Manager for all Nera network elements1(:

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Nera Element vieW.- Configurator; Configurator for CityLink radio relay

2'8 OutDoor Unit22) Out Of Frame3$%; Private Automatic Branch eXchange3&0 Pulse Code Modulation

3, Physical Interface3// Phase Locked Loop32+ Path OverHead35%6 Pseudo Random Bit Sequence36. Phase Shift Keying38, Peripheral Unit Interface5) Radio Frequency5,' Radio Frequency Identification536 Radio Protection Switching555 Radio-Relay Regenerator557 Radio-Relay Terminal


$EEUHYLDWLRQ 'HVFULSWLRQ56 Regenerator Section

562+ Regenerator Section overhead567 Regenerator Section Termination6'+ Synchronous Digital Hierarchy6(76 Synchronous Equipment Timing Source6103 Simple Network Management Protocol62+ Section OverHead

670 Synchronous Transport Module, 1 means the lowest defined datarate = 155.520Mbit/sec69&( SerVice ChannEl, used to define the voice channel circuit board6: SoftWare

7&0 Trellis Coded Modulation701 Telecommunication Management Network78 Tributary Unit

7&3,3 Transmission Control Protocol/Internet Protocol78* Tributary Unit Group9& Virtual Container

1HWZRUNDQGV\VWHPRYHUYLHZA principle block diagram for a digital radio relay system, including the main blocks, is shown in Figure1. The block diagram includes marked interface points which serve as reference points for severaltechnical parameters used in this document.Baseband interfaces for the equipment are STM-1 electrical or optical, 2Mb/s wayside channel and64kb/s insert channel.

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18GHz 17.7-19.7GHz ITU-R F.595-5 55 1010 MHz23GHz 21.2-23.6GHz ITU-R F.637-2 56 1232 MHz23GHz 21.2-23.6GHz ITU-R F.637-2 and

prEN 300 19856 1008 MHz

25GHz 24.25-26.5GHz ITU-R F.748-2 56 1008 MHz

Channel arrangements for the various frequency bands are shown in Appendix A.Note: Channels 1(1’) and 17(17’) in the 18 GHz band can not be used with the current version of thetransceiver.

6\VWHPFRQILJXUDWLRQVCityLink is available in 1+0 (unprotected) and hot standby configurations.

FRQILJXUDWLRQThis system consists of one indoor unit and one outdoor unit interconnected with a single coaxial cable.Figure 2-2 shows a 1+0 system overview. Each of the shaded area represents a unit. The IDU is a singleunit. The ODU is assembled by transceiver unit and branching unit.

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+RWVWDQGE\FRQILJXUDWLRQIn hot standby configuration the IDU, the transceiver unit and the coaxial cable between IDU and ODUare duplicated. The two transceivers share the same branching unit. A switch at radio frequency level,included in the branching unit, allows for switching between the two transmitters. A splitter andswitching unit placed between the two IDU’s is added. For each terminal one antenna is used. TheSTM-1 interfaces between the IDU’s and hot standby IDU switch are always at electrical level even ifthe protected STM-1 user interface is optical.


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See chapter 0 for technical specification of the hot standby function.

5DGLRWHUPLQDOFRQILJXUDWLRQVThe STM-1 radio channel can be configured with RS- or MS-termination according to ITU-T Rec.G.783.Figure 2-2 shows examples of various configurations.

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5DGLRUHSHDWHUFRQILJXUDWLRQVA radio repeater is built by using two terminals. The interface between the terminals is STM-1. Therepeater can be configured with RS-termination according to ITU-T Rec. G.783.

5DGLRFKDQQHOLGHQWLILFDWLRQThe radio channel is identified by two allocated bits in the media specific byte (MS#3) in SOH. Channelidentification is controlled by NEW SW.

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,QVWDOODWLRQThe equipment is very easy and quick to install. It is designed for stationary use in split mountinstallations but can also be all indoor mounted. One coaxial cable between IDU and ODU is used. (Onecable for 1+0 systems and two cables for hot standby systems.)

6DIHW\FRQGLWLRQVThe equipment conforms to EN60215. The optical interfaces conform to EN60825-1 and EN60825-2.

(QYLURQPHQWDOFRQGLWLRQVThe equipment conforms to the environmental classes defined in ETS-300-019:

• 7UDQVSRUWDWLRQ ETS-300-019-1-2, class 2.3, public transportation.• 6WRUDJH ETS-300-019-1-1, class 1.2, weather protected,

not temperature-controlled storage locations.(extreme temperature range: -25°C to +55°C).

• 8VH Indoor mounted units: Temperature range: -5°C to +50°C.According toETS-300-019-1-3, class 3.2, partly temperature-controlled locations, for temperature -5°C to +45°C.For temperatures between +45°C and +50°C the relative humidityshall be between 5% and 40%.

Outdoor mounted units: Standard temperature range: -33°C to +50°C.According to ETS-300-019-1-4, class 4.1, non weather protectedlocations, for temperature -33°C to +40°C.For temperature between +40°C and +50°C the relative humidityshall be between 15% and 35%.

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(OHFWUR0DJQHWLF&RPSDWLELOLW\FRQGLWLRQV(0&The equipment conforms to the EMC standard as specified in ETS 300 385 for grade B equipment.

(TXLSPHQWW\SHDSSURYDOThe equipment meets the requirements for CE labelling. CE marking is located on both IDU and ODU.

0HFKDQLFDOFKDUDFWHULVWLFVThe ODU can be mounted on the back of Nera antennas (Ø=0.45 m, 0.6m or 1.2m), or on a verticalcolumn (Ø=115mm or Ø=75mm). A column arrangement for tower, wall, and roof mounting isoptionally supplied.The IDU can be installed as a stand-alone unit, or it can be mounted within an ETSI standard cabinet (ref.ETS 300 119) or 19” standard cabinet (ref. IEC 297-2 and IEC 297-3). It may be wall mounted as well.


'LPHQVLRQVIDU Note 1: 483mm (W) x 250mm (D) x 50mm (H)Hot standby IDU switch Note 1: 483mm (W) x 250mm (D) x 50mm (H)Outdoor unit, 1+0 terminal: 135mm (W) x 310mm (D) x 430mm (H)Outdoor unit, hot standby terminal: 225mm (W) x 310mm (D) x 450mm (H)

Note 1: The width and depth of the unit are exclusive flanges (mounting brackets) and table studs for free-standing mounting.Special brackets for mounting into different cabinets are available.

The minimum distance between IDU’s when stacked vertically is 10mm. The minimum height of a hotstandby terminal is approx. 200 mm when mounted in ETSI rack, and approx. 220 mm when mounted in19” rack.

:HLJKWVIndoor unit: Approx. 4 kgHot standby IDU switch: Approx. 3.5 kgTransceiver unit: Approx. 5.5 kgBranching unit, 1+0 Approx. 2.8 kgBranching unit, hot standby Approx. 5 kgAntenna unit (Diameter 0.45m): Approx. 13 kgAntenna unit (Diameter 0.6m): Approx. 15 kgAntenna unit (Diameter 1.2m): Approx. 38 kg

6\VWHPV\QFKURQLVDWLRQThe system can be synchronised to one of the following sources:• STM-1 signal from line side• STM-1 signal from radio side• Internal oscillator

&RQWURODQG6XSHUYLVLRQIDFLOLWLHVIn order to facilitate system control and fault finding, an internal control- and supervision system isincluded. This system is used to perform configuration-, fault-, event- and performance management.See chapter 8 for more details.

3RZHUVXSSO\The equipment operates from a battery supply between -40.5 volt and -57 volt, nominally -48 volt DCaccording to ETS 300 132-2.The primary DC-power is supplied to the indoor unit through a fuse and afiltering function that includes input filter to attenuate the common mode noise.The power to the outdoor unit is supplied from the indoor unit via the IF coaxial cable.

Maximum power consumption *: IDU: < 30 WODU: < 85 WHot standby IDU switch < 15W1+0 system: < 115 WHot standby system: < 245 W

Average power consumption *: 1+0 system: < 80 WHot standby system: < 175 W

* With nominal battery supply voltage, i.e. –48 volt.


/RRSEDFNVFor testing and fault finding there is a variety of integrated loopbacks. Figure 2-3 shows possible loopsfor the main data. In addition the 64kb/s channel and the 2Mb/s wayside channel may be looped. Onlyone loop may be active at the same time. The loopbacks are configured by NEW SW. The table belowdescribes the looping possibilities.

STM-1Line

Decoder

LineEncoder

MODULATOR

IF LINEInterface

TRANSMITTER

RECEIVER

IF LINEInterface

RF

RF

IF

IFIF

IF

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IDUODU

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Name DescriptionSTM-1 baseband loop, far-end Loop 1) in Figure 2-3.STM-1 baseband loop, near-end Loop 2) in Figure 2-3IF loop IDU, near-end Loop 3) in Figure 2-3IF loop ODU, near-end Loop 4) in Figure 2-3RF loop, near-end Loop 5) in Figure 2-32Mb/s wayside loop, near-end The incoming 2Mb/s wayside is looped back to 2Mb/s wayside output.2Mb/s wayside loop, far-end The 2Mb/s wayside output is looped back to 2Mb/s wayside input.64kb/s loops, far-end The 64kb/s data channel output may be looped back to the

corresponding input.

06$,6LQVHUWLRQMS-AIS may be inserted when one of the following criteria is detected:

• Loss of synchronisation at STM-1 signal.• RF identification mismatch.• HBER (high bit error rate) threshold, in direction from the transceiver, is exceeded.• Regenerator section trace (J0) mismatch.

The MS-AIS insertion, in both directions, is configured by NEW SW.The MS-AIS removal time may be configured from 0 to 199 seconds in 1-second steps.


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0RQLWRULQJRIV\VWHPSHUIRUPDQFHTransmission performance data is monitored continuously by the built-in supervision function. Thesupervision function performs measurements and calculations based on the BIP-codes in the STM-1frame. Error information from the Trellis decoder in the demodulator is also available. See descriptionof the error pulse outputs in chapter 8.2.6.

6\VWHPSHUIRUPDQFHFDOFXODWLRQVPerformance data can be presented according to ITU-T Rec. G.826. The following system qualitycalculations are included:

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Error Second Ratio (ESR) yes yesSeverely Error Second Ratio (SESR) yes yesBackground Block Error Ratio (BBER) yes yesUnavailable state (UAS) yes yes

The actual availability of these options depends on the selected configuration.

(TXLSPHQWEDFNJURXQG%(55HVLGXDO%(5Equipment background BER is measured under simulated operating conditions over an artificial hopwithout interference. The input signal level at point C is between 15 dB and 40 dB above the level whichgives BER = 10-3. In a measurement period of 24 hours the number of bit errors shall be less than 10(BER ≤ 10-12). The BER shall be measured on 140Mb/s PRBS sequence mapped into the STM-1 frame.

6\VWHPJDLQGuaranteed values:

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1+0 system gain C‘C (10-3) [dB] 90 89 89

Hot standby system gain C‘C (10-3) [dB] 83 82 82

6\VWHPVLJQDWXUHSystem signature is specified including Adaptive Time Domain Equaliser (ATDE).The system will recover after loss of synchronisation if the notch-depth is ≤10 dB for both minimum andnon-minimum phase.Signature mask (delay = 6.3ns): BER = 10-3 BER = 10-6

Max. notch depth, both minimum and non-minimum phase 12 dB 10 dBSignature bandwidth: < ±18 MHz < ±20 MHzSignature factor, typical value [1/MHz]: 3.5 5.0


6\VWHPUHOLDELOLW\The reliability and stability of the equipment are such as to allow unstaffed stations.

0HDQ7LPH%HWZHHQ)DLOXUH07%)The MTBF figures are predicted and calculated according to methods in MIL-HDBK-217E includingadjustment for experienced field data.8QLWQDPH 07%)

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[KRXUV]Transceiver Unit >360.000 >140.000Branching unit, 1+0 >2.700.000 >2.600.000Branching unit, hot standby inc. RF switch >2.100.000 >2.000.000Indoor unit >390.000 >200.000Hot standby IDU switch >500.000 >350.000

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&RFKDQQHOLQWHUIHUHQFHVHQVLWLYLW\18GHz freq. band: According to prEN 300 430.23GHz freq. band: According to prEN 300 198.25GHz freq. band: According to prEN 300 431.

The limits of the co-channel interference sensitivity are shown in Table 2-1, referred to point B. Thetables show maximum C/I values for 1dB and 3dB increase of the 10-6 BER threshold.

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$GMDFHQWFKDQQHOLQWHUIHUHQFHVHQVLWLYLW\18GHz freq. band: According to prEN 300 430.23GHz freq. band: According to prEN 300 198.25GHz freq. band: According to prEN 300 431.


The limits of the adjacent channel interference sensitivity are as given in Table 2-2, referred to point B.The tables show maximum C/I values for 1dB and 3dB increase of the 10-6 BER threshold.

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,)'&LQWHUIDFHWREUDQFKLQJXQLWType of connector: Hermetic D-sub with one coax and 4 pins, male.Note: This is an internal interface. It is not available for measurements when the system is in operation.

5)LQWHUIDFHWREUDQFKLQJXQLWPBR220 waveguide flange is used.Note: This is an internal interface. It is not available for measurements when the system is in operation.

5)LQSXWPRQLWRULQJOne BNC connector at the transceiver unit is available for RF-input monitoring. (By using a highimpedance voltmeter, 1.3 volt corresponds to -70dBm and 0.1 volt increase corresponds to 10dB increasein signal level.) An audio signal in the transceiver indicates RF-input level when the cap on theconnector is removed.The RF-input may also be monitored at the local LCD display at the IDU, or by NEW SW.

Accuracy: +5dB/- 2dB

6SXULRXVHPLVVLRQV18GHz freq. band: According to prEN 300 430.23GHz freq. band: According to prEN 300 198.25GHz freq. band: According to prEN 300 431.

The limit values of transmitter spurious emissions measured in point C’ are shown in Table 3-1, Table3-2 and Table 3-3.

30 MHz to 21.2 GHz ≤ -50 dBm21.2 GHz to 60 GHz ≤ -30 dBm

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9 kHz to 21.2 GHz ≤ -50 dBm


21.2 GHz to 110 GHz ≤ -30 dBm


30 MHz to 21.2 GHz ≤ -50 dBm21.2 GHz to 80 GHz ≤ -30 dBm


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2XWSXWSRZHUGuaranteed values measured with modulation (PRBS-data).


Output power at A’ [dBm] +18.0 +17.5 +17.51+0 system; Output power at C’ [dBm] +17.0 +16.5 +16.5Hot standby system; Output power at C’ [dBm] +14.0 +13.5 +13.5

Nominal values are 1 dB higher than the guaranteed values.Tolerance: +2 / -1 dB

$XWRPDWLF0DQXDO7UDQVPLWWHU3RZHU&RQWURO$73&073&ATPC is an optional feature which is aimed to drive the TX Power amplifier output level from a properminimum, which is calculated to facilitate the radio network planning and is used in the case of normalpropagation, up to a maximum value which is given in chapter 3.5.1. When ATPC is disabled (i.e.MTPC mode), the output power can be set by NEW SW.

ATPC-figures:Transmitter power output regulation speed: Approx. 50 dB/sATPC-range (from maximum to minimum output power): 10 dB

Nominal input level is adjustable through the supervision system.Adjustment range: -30 dBm to -60 dBm

ATPC may be used with hot standby configuration if simultaneous switching of Tx and Rx switches atthe same terminal is configured.

MTPC figures:MTPC range: 10 dBStep size: 1dBAccuracy: See output power tolerance in chapter 3.5.1.

7;RVFLOODWRUIUHTXHQF\WROHUDQFHFrequency tolerance: ≤ ± 10 ppm This limit includes both short-term factors (environmental effects) and long-term ageing effects.


5)VSHFWUXPPDVNVRF spectrum masks are shown in Figure 3-4 and Figure 3-5.

-60

-50

-40

-30

-20

-10

0

10

-200 -150 -100 -50 0 50 100 150 200

)UHTXHQF\RIIVHW0+]!

(70,-50)

(33,-30)

(0,+1)

(137.5,-50)

(22.5,+1)

)LJXUH5)VSHFWUXPPDVN*+]EDQG

-60

-50

-40

-30

-20

-10

0

10

-200 -150 -100 -50 0 50 100 150 200

)UHTXHQF\RIIVHW0+]!

(80,-50)

(65,-35)(33,-30)

(0,+1)

(140,-50)

(22.5,+1)

)LJXUH5)VSHFWUXPPDVNDQG*+]EDQGV0+]FKDQVSDFLQJ

6SHFWUDOOLQHVDWWKHV\PEROUDWH18GHz freq. band: According to prEN 300 430 (-37dBc).23GHz freq. band: According to prEN 300 198 (-23dBc).25GHz freq. band: According to prEN 300 431 (-35dBc).

,)LQSXWFKDUDFWHULVWLFVCentre frequency: 350 MHzInput level (at 350MHz): -42dBm to +1dBmImpedance: 50 Ω unbalancedReference point is N-connector at branching unit


5HFHLYHUFKDUDFWHULVWLFV

5HFHLYHUWKUHVKROGGuaranteed receiver threshold in point C with 32TCM modulation (Measured with PRBS of 223-1).Typical values are about 1dB lower.

V\VWHP


BER ≤ 10-3 [dBm] -73.0 -72.5 -72.5

BER ≤ 10-6 [dBm] -70.0 -69.5 -69.5

BER ≤ 10-8 [dBm] -67.5 -67.0 -67.0

+RWVWDQGE\V\VWHP


BER ≤ 10-3 [dBm] -69.0 -68.5 -68.5

BER ≤ 10-6 [dBm] -66.0 -65.5 -65.5

BER ≤ 10-8 [dBm] -63.5 -63.0 -63.0

0D[LPXPLQSXWVLJQDOOHYHOMaximum input signal levels in point C (Measured with PRBS of 223-1).These limits apply without interference:

BER ≤ 10-3 -20.0 dBm

BER ≤ 10-8 -24.0 dBm

5;RVFLOODWRUIUHTXHQF\WROHUDQFHFrequency tolerance: ≤ ±10 ppmThis limit includes both short-term factors (environmental effects) and long-term ageing effects.

,PDJHIUHTXHQF\DWWHQXDWLRQNot applicable for single channel systems, ref. prEN 300 430, prEN 300 198 and prEN 300 431.

1RLVHILJXUH


Noise figure F at point A [dB] ≤ 5.0 ≤ 5.5 ≤ 5.5

Noise figure F at point C [dB] Note 1 ≤ 6.0 ≤ 6.5 ≤ 6.5

Noise figure F at point C [dB] Note 2 ≤ 10.0 ≤ 10.5 ≤ 10.5Note 1: 1+0 system with wideband branching filters.Note 2: Hot standby system with symmetrical RF splitter.


,)RXWSXWFKDUDFWHULVWLFVCentre frequency: 140 MHzOutput level: -10dBmOutput level tolerance: -2dB to +1dBImpedance: 50 Ω unbalancedReference point is N-connector at branching unit

%5$1&+,1*$1'5)),/7(5,1*&+$5$&7(5,67,&6

*HQHUDOGHVFULSWLRQThe branching unit will be available in two different mechanical designs; one for 1+0 systems and onefor hot standby systems. Antenna circulator and RF filters are included in the branching unit. In the hotstandby version the RF switch and RF splitter are also included in the branching unit.

The branching unit uses broadband RF filters. In each frequency band the 1+0 branching and the hotstandby branching will each be available in 4 different variants. See Appendix A for details.

,QWHUIDFHWRDQWHQQDIHHGHUV\VWHPBetween the branching unit and the antenna a flexible waveguide with PBR220 flanges is used.Vertical polarisation at the antenna is the normal situation. Horizontal polarisation is obtained byrotating the antenna feeder unit by 90 degrees.

Length and typical losses of flexible waveguide:127mm / 0.1dB used together with Nera antennas with diameter 0.45m and 0.6m.285mm / 0.3dB used together with Nera antennas with diameter 1.2m.

,QWHUIDFHIRUFRD[LDOFDEOHWR,'8The cable from the IDU is connected to the branching unit. The IF signals and DC power are separatedin the branching unit and connected to the transceiver unit(s). With this solution the cable may remainconnected during transceiver replacement.Type of connector: N-connector, female

5)ILOWHUXVDEOHEDQGZLGWKDQGW\SLFDOORVVHVIn the table below point C’/C is located at the branching unit. See also Appendix A.

*+] *+] *+]

RF filter usable bandwidth ≥ 520 MHz ≥ 640 MHz ≥ 500 MHz1+0 system; Loss A’ - C’ (C - A) 1.0 dB 1.0 dB 1.2 dBHot standby system; Loss A’ - C’ 4.0 dB 4.0 dB 4.2 dBHot standby system; Loss C - A 5.0 dB 5.0 dB 5.2 dB


,)&$%/(&+$5$&7(5,67,&6

The IDU and ODU are interconnected with use of one singe coaxial cable per radio channel. The cablemust be in accordance with the following requirements:

&DEOHUHTXLUHPHQWVCharacteristic impedance: 50 ± 3 ΩMax. attenuation at 140 MHz: 30 dBMax. attenuation at 350 MHz: 40 dBMax. DC resistance: < 1.5 Ω , sum of inner and outer conductorMax. cable length: 300 metersType of cable connector: N-connector, male (at cable side)

5HFRPPHQGHGFDEOH - Flexible tube coaxial cable e.g. FSJ1-50. (¼″)

2WKHUFDEOHVPD\DOVREHXVHGIRUH[DPSOH- Cellflex CF ¼” Cu 2Y, 50Ω -Cellflex LCF 3/8” Cu 2Y, 50Ω

0D[LPXPFDEOHOHQJWKVCable Maximum cable length with

minimum supply voltage. (40.5 volt)Minimum supply voltage with 300

meter cableFSJ1-50 90 meter 47 volt

CF ¼” Cu 2Y, 50Ω 200 meter 42 volt

LCF 3/8” Cu 2Y, 50Ω 300 meter 40.5 volt

7KHIROORZLQJVLJQDOVDUHWUDQVPLWWHGYLDWKHFDEOH• IF signals, at 350MHz in the transmit direction and at 140MHz in the receive direction.• Power to the ODU• Modem - Transceiver Communication (MT-Com) for configuration and control of the ODU. FSK

modulation is used.Over-voltage protection and cable equaliser are integral parts of the cable interface.See chapter 6.3 for more information about the signals.


02'(0&+$5$&7(5,67,&6

The modem includes both modulator and demodulator.Modulation method: 32-TCMGross-transmitted bit-rate: 155.52 Mb/sSymbol-rate: 38.88 Msym/s

0RGXODWRUFKDUDFWHULVWLFV99% power bandwidth: 18 GH band: Approx. 47 MHz

23 and 25 GHz bands: Approx. 54 MHz

'HPRGXODWRUFKDUDFWHULVWLFVDemodulator for 32-CROSS utilising coherent detection.Adaptive Time Domain Equaliser with 7 linear taps.Trellis decoder utilising the Viterbi algorithm.3-dB bandwidth at IF: 38.88 MHz

&KDUDFWHULVWLFVRIVLJQDOVWUDQVPLWWHGEHWZHHQ,'8DQG2'8IF output characteristics:Centre frequency: 350 MHzOutput level: 0 dBmOutput level tolerance: -2dB to +1dBImpedance: 50 ohm unbalancedReference point is N-connector at IDU.

IF input characteristics:Centre frequency: 140 MHzInput level: -42 dBm to -9 dBmImpedance: 50 ohm unbalancedReference point is N-connector at IDU.

Modem Transceiver Communications (MT-Com):The FSK modulated data channel is used for communication between µ-controllers in the transceiver unitand the IDU.


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6HFWLRQ2YHU+HDG62+Use of Section OverHead bytes conforms to ITU-T Rec. G.707. Access to bytes in MSOH at aregenerator is according to ITU-R Rec.750. A description is given in Table 7-1:For available user channels see chapter 7.4.

A1 A1 A1 A2 A2 A2 J0 N NB1 MS#1 MS#2 E1 X X F1 N ND1 MS#3 X D2 X X D3 X XH1 H1 H1 H2 H2 H2 H3 H3 H3B2 B2 B2 K1 X X K2 X XD4 X X D5 X X D6 X XD7 X X D8 X X D9 X X

D10 X X D11 X X D12 X XS1 Z1#1 Z1#2 Z2#1 Z2#2 M1 E2 N N

7DEOH8WLOLVDWLRQRI62+6HFWLRQ2YHU+HDGVKDGHGE\WHVFDQEHXVHGDVDZD\VLGHFKDQQHO

)UDPHZRUGDQGSDULW\E\WHVThe first nine bytes in the STM-1 frame (row 1 in Section OverHead) are unscrambled according to ITU-T Rec. G.707.

A1: Frameword (11110110)A2: Frameword (00101000)J0: Regenerator Section TraceB1: BIP-8 (Bit Interleaved Parity-8) (RST)B2: BIP-24 (Bit Interleaved Parity-24) (MST)

Byte 8 and byte 9 in row 1 are reserved for national use. If not used these bytes contain the word10101010 or 01010101.

0HGLDVSHFLILFE\WHVOne byte in RSOH (MS#3) is used for internal radio specific purposes and is not available for externaluse. The bytes MS#1 and MS#2 are not used internally in CityLink.

MS#1: User channel.MS#2: User channel.MS#3: RF-id, remote reset and ATPC.

2WKHU62+E\WHVE1-byte: User channel.F1-byte: User channel.D1-D3 bytes: Embedded control channel - Regenerator, (ECC-R).D4-D12 bytes: Embedded control channel - Multiplexer, (ECC-M).


E2-byte: User channel.K1/K2-byte: MSP function is not implemented.S1-byte: Synchronisation Status Message.Z1/Z2-byte: User channel.M1-byte: Multiplex Section - Remote Error Identifier (MS-REI).N-bytes: Reserved for national use. If the bytes are not used externally, they can be usedas user channel

6FUDPEOLQJGHVFUDPEOLQJIXQFWLRQVThe system contains a radio specific scrambler / descrambler which randomises the transmitted digitalsignal in order to make the RF power spectrum as uniform as possible, irrespective of the transmitteddata. The Network Node Interface (STM-1) is scrambled according to ITU-T Rec. G.707:

Radio specific scrambler type: 15 bit parallelRadio specific scrambler polynomial: 1 + X14 + X15

NNI scrambler type (ITU-T Rec. G.707 chapter 2.4): 7 bit parallelNNI scrambler polynomial: 1 + X6 + X7

7UDQVPLVVLRQLQWHUIDFHV

*HQHUDOThe IDU is equipped with one main STM-1 data interface. Two alternative IDUs are available, one withelectrical interface and one with optical interface.In the following chapters the main characteristics of the interfaces are listed.

7UDQVPLVVLRQLQWHUIDFHFKDUDFWHULVWLFV670HOHFWULFDOElectrical interface according to ITU-T Rec. G.703:Bitrate: 155.520 Mb/s ± 20 ppmLine code: CMIImpedance: 75 Ω unbalancedReturn loss (8 MHz to 240 MHz): ≥ 15 dBPulse amplitude: 1.0 V ± 0.1 VMaximum attenuation of input signal at 78 MHz: 12.7 dBConnector type: DIN47297, 1.0/2.3mm

Input jitter and wander tolerances are according to ITU-T Rec. G.783. Detailed parameters are given inITU-T Rec. G.958. Output jitter and wander generation is according to ITU-T Rec. G.783. Jitter andwander transfer is according to ITU-T Rec. G.783 and ITU-T Rec. G.958. The jitter specifications areaccording to type B regenerator.

7UDQVPLVVLRQLQWHUIDFHFKDUDFWHULVWLFV670RSWLFDOOptical interface according to ITU-T Rec. G.957; S-1.1:


Bitrate: 155.520 Mb/s ± 20 ppmOperating wavelength range: 1261 - 1360 nmSource type: MLMMean launched power: - Maximum: -8dBm

- Minimum: -15dBmSpectral width RMS - Maximum: 7.7nmMinimum extinction ratio: 8.2dBAttenuation range: 0 - 12 dBMinimum receiver sensitivity (BER < 10-10): - 28 dBmMinimum receiver overload: -8dBmConnector type : SC

Input jitter tolerance, jitter transfer and jitter generation is according to ITU-T Rec. G.958, for type Bregenerator.

NEVDQGZD\VLGHFKDQQHOV

*HQHUDOAs an optional feature, interface for one 64kbit/s data channel and one 2.048Mbit/s wayside channel, areavailable. The wayside and the 64kb/s channel are transmitted as parts of SOH.The 2.048 Mbit/s wayside channel uses the 33 shadowed bytes shown in Table 7-1. Provided that theshadowed bytes are available, the wayside channel can also be used in RS mode because the B2-paritywill not be affected. When the wayside channel is not used, any of the shadowed bytes in the table mayalso be used for the 64kb/s data channel.Use of 2.048 Mb/s for wayside channel will limit the number of bytes available for the 64kbit channel toE1, E2, F1, Z1, Z2, MS#1 and MS#2. In RS-mode only E1, F1, MS#1 and MS#2 are available for 64kb/schannel.

0EVZD\VLGHFKDQQHOFKDUDFWHULVWLFVElectrical interface according to ITU-T Rec. G.703:

Bitrate: 2.048 Mb/s ± 50 ppmLine code: HDB3Impedance: 75 ΩReturn loss (.05MHz to .102 MHz): ≥ 12 dB

(0.102 MHz to 2.048 MHz): ≥ 18 dB(2.048 MHz to 3.072 MHz): ≥ 14 dB

Pulse amplitude: 2.37 V ± 0.237 VMaximum attenuation of input signal at 1.024 MHz: 6 dBConnector type: DIN47297, 1.0/2.3mm

Input jitter and wander tolerances are according to ITU-T Rec. G.823. Intrinsic jitter generation (i.e.output jitter in the absence of input jitter) is according to ITU-T Rec. G.921. Jitter and wander transfer isaccording to ITU-T Rec. G.921, ITU-T Rec. G.823 and ITU-T Rec. G.742.

NEVFKDQQHOFKDUDFWHULVWLFVThe interface is according to V.11, contra directional without byte timing.


Connector type: RJ-45

0$1$*(0(176<67(0&+$5$&7(5,67,&6

*HQHUDOAn integrated supervision system makes the CityLink capable of functioning as a Network Element (NE)in a managed SDH transmission network. The supervision systems on the various radio-relay stations areexchanging information over the embedded communication channel, ECC. Standardised use of QECC isprovided. For set up and configuration of the radio the enclosed NEW-Configurator SW, is needed. Fornetwork management and operation we provide the Nera Element vieW - Network Management System(NEW-NMS). The NEW-NMS element manager offers services such as fault management, performancemanagement, configuration management and security management for all Nera network elements.

,QWHUIDFHVWRWKHVXSHUYLVLRQV\VWHP

*HQHUDOVarious external interfaces are available for the supervision system. The standard interface is a LocalCraft Terminal (LCT) interface for connection to the NEW-Configurator SW/NEW-NMS SW forconfiguration and set up, and network management of Network Elements (NE’s).Other interfaces are Network Interface (NI) and LAN interface. The NI and LAN interfaces may be usedfor interconnection of Nera NE’s or for connection to higher order Telecommunication ManagementNetwork (TMN). If LAN is not used a second NI interface may be used.An alarm input and auxiliary output interface is also available as an optional feature.

/&'/('¶VA 2 x 16 character LCD display on the IDU combined with 4 push buttons are available for alarm viewand RF input and output level monitoring on the local terminal.4 LEDS on IDU show the alarm status of the terminal:• One green LED indicating power on.• One red LED indicating critical alarms.• One red LED indicating major and minor alarms.• One orange LED indicating warnings.

/&7LQWHUIDFH3&,QWHUIDFHElectrical interface: RS-232 (DTE)Baudrate: 1.200 - 115.200kbit/s asynchronousProtocol: ProprietaryConnector type: 9 pin D-Sub, male

/$1LQWHUIDFHTwo alternative connections are provided for 10Mb/s Ethernet:


LAN (TP): Twisted pair interface (IEEE802.3):Embedded 10BASE-T Medium Attachment Unit (MAU).Connector type: RJ-45

LAN(AUI): Attachment Unit Interface (IEEE802.3):This interface serves as a connection point for an external Medium Attachment Unit (MAU), commonmentioned as an Ethernet transceiver. Since the limited space on the front of the equipment an additionaldrop cable is required to connect the MAU.For thin-wire coaxial Ethernet use a 10BASE2 MAU.Connector type: 15 pin D-Sub, female (with screw lock)

1HWZRUN,QWHUIDFH1,One NI interface is available. If LAN is not used than a second NI interface may be used.Electrical interface: RS-485Baudrate: 1.200 - 115.200kbit/s asynchronous or

64 - 200kbit/s synchronousProtocol: ProprietaryConnector type: 9 pin D-sub, female

$OP$X[LQWHUIDFHAuxiliary external alarm inputs:Number: 8Type: 4 “Current loop” Note 1 and 4 TTLConnector type: 25 pin D-dub (female)

Auxiliary outputs:Number: 4Type: RelayMax switching current: 0.5A in resistive loadConnector: 25 pin D-dub (female) (Same connector as used for the auxiliary alarm inputs)Mapping of local alarms (i.e. alarms from local terminal), configured by NEW SW, are available at theoutput pins.

Error pulse outputs:One pulsed output, available simultaneous at 3 different level formats, may be configured by NEW SWto one of the following sources:• B1- or B2- parity error pulses, from line side or radio side.• Error pulses from Trellis decoder.

Minimum pulse width (logical high level): 1µsMinimum distance between two pulses (logical low level): 3.3µsMinimum pulses at unavailable channel: 72.000 pulses/sType: V.11

Open collectorOptoisolator

Connector type: 25 pin D-dub (female) (Same connector as used for the auxiliary alarm inputs)


Note 1: This interface is not “standard current loop”. SeeFigure 8-1. Recommended use is together with anexternal relay or open collector/drain output. Each ofthe 8 inputs consist of 2 pins, 1 floating ground andone signal pin. All the 8 ground pins are connectedtogether.Input not connected means logical 0.Input shorted means logical 1.Input >1.6 volt means logical 1.

FloatingGnd

-1.6volt-5.0volt

-

+Input

1k10k

Figure 8-1: "Current loop" alarm input interface

7(&+1,&$/63(&,),&$7,21+2767$1'%<)81&7,21

See also chapter 2.2.2. All connections are at the front of the hot standby IDU switch.

Protected user interfaces:These interfaces are available at the front of the hot standby IDU switch.• STM-1: Two alternative hot standby IDU switches are available, one with electrical interface and

one with optical interface.− Electrical interface: According to G.703. See chapter 7.3.2 for characteristics.− Optical interface: According to ITU-T rec. G.957, S-1.1. See chapter 7.3.3 for

characteristics.• 2Mbit/s wayside channel, according to ITU-T, Rec. G.703. See chapter 7.4.2 for characteristics.

Non protected user interfaces:These interfaces are available at both IDU’s.• 64 kbit/s data channel• LCT interface (PC interface)• LAN interface• Network interfaces (NI)• Alm & Aux interface

Performance specifications:• Switching time, receive side: <20ms for Rx switch in the hot standby IDU switch.• Switching time, transmit side: <20ms for Tx switch in the branching unit• The Tx and Rx switches at a terminal may be configured by NEW SW to switch independently or

simultaneously.• Choice of switching to prioritised branch or not, after repair of fault may be configured by NEW SW.• Manual switching, locally or remotely, is performed by NEW SW.

Switching criteria’s in receive direction:


• RF-INPUT The RF input signal is missing (ODU)• LO Local oscillator alarm (ODU)• IF-DEM Loss of incoming 140MHz IF to demodulator (IDU)• LOF Loss of frame (i.e. sync loss in demodulator) (IDU)• HBER User defined bit error threshold.• LT-PLL Line Transmit PLL alarm (IDU)

Switching criteria’s in transmit direction:• RF-OUT RF output power alarm (ODU)• LO Local oscillator alarm (ODU)• IF-INP Loss if 350 MHz IF input to transceiver (ODU)• IF-MOD Loss of IF output from modulator (IDU)• LOF-LR Loss of frame at STM-1 input signal to IDU• LOS-LR Loss of STM-1 input signal to IDU• RT-PLL Radio Transmit PLL alarm (IDU)

Power supply:• The hot standby IDU switch operates from a battery supply, nominally -48 volt DC. See chapter 2.11

for details.

LEDs at the front of the hot standby IDU switch:For each alarm in the hot standby switch unit a severity level critical, major, minor or warning is defined.For each alarm the severity levels may be changed by NEW SW.• Two green LED’s showing active Rx channel• Two green LED’s showing active Tx channel• One red LED indicating critical alarms in hot standby switch unit.• One red LED indicating major and minor alarms in hot standby switch unit.• One orange LED indicating warnings in hot standby switch unit.• One green LED indicating power on

Loopbacks:In the hot standby IDU switch far end loops for each protected interface are included.In a hot standby system only one loop may be active at the same time. E.g. if one loop in the hot standbyswitch unit is chosen than no loops in the IDU’s may be active. The loopbacks are controlled by NEWSW. See also chapter 2.12.


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Both horizontal and vertical polarisation may be used.

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0+]FKVSDFLQJ

· · ·· · ·

·

·

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%UDQFKLQJ/RZHU%

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1803

0

1792

0

1786

5

1781

0

1814

0

1819

5

1808

5

1797

5

1825

0

1830

5

1836

0

1841

5

1847

0

1852

5

1858

0

1863

5

1904

0

1893

0

1887

5

1882

0

1876

5

1915

0

1920

5

1909

5

1898

5

1926

0

1931

5

1937

0

1942

5

1948

0

1953

5

1959

0

1964

5

1775

5

1970

0

1770

0

1870

0Note: Channels 1(1’) and 17(17’) can not be used with the current version of the transceiver.Branching Lower-A covers channels 2 (17810MHz) to 8 (18140MHz). Branching Upper-A covers channels 2’ (18820MHz) to8’ (19150MHz).Branching Lower-B covers channels 9 (18195MHz) to 16 (18580MHz). Branching Upper-B covers channels 9’ (19205MHz) to16’ (19590MHz).


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2150

7.5

2139

5.5

2133

9.5

2128

3.5

2161

9.5

2167

5.5

2156

3.5

2145

1.5

2173

1.5

2178

7.5

2184

3.5

2189

9.5

2195

5.5

2201

1.5

2206

7.5

2273

9.5

2262

7.5

2257

1.5

2251

5.5

2285

1.5

2290

7.5

2279

5.5

2268

3.5

2296

3.5

2301

9.5

2307

5.5

2313

1.5

2318

7.5

2324

3.5

· · · · · ·

2122

7.5

2120

0

2329

9.5

2360

0

2245

9.5

2240

0

· ·

Branching Lower-A covers channels 1 (21227.5MHz) to 11 (21787.5MHz). Branching Upper-A covers channels 1’(22459.5MHz) to 11’ (23019.5MHz).Branching Lower-B covers channels 12 (21843.5MHz) to 16 (22067.5MHz). Branching Upper-B covers channels 12’(23075.5MHz) to channel 16’ (23299.5MHz).


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2213

4

2219

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2207

8

2224

6

2230

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2235

8

2241

4

2247

0

2252

6

2336

6

2325

4

2319

8

2314

2

2308

6

2347

8

2353

4

2342

2

2331

0

· · · ·

Branching Lower-C covers channels 1 (22078MHz) to 9 (22525MHz). Branching Upper-C covers channels 1’(23086MHz) to9’ (23534MHz).



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· · ·

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·

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2485

7

2474

5

2468

9

2463

3

2496

9

2502

5

2491

3

2480

1

2508

1

2513

7

2519

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2524

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2530

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2536

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2541

7

2586

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2564

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2558

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2597

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2614

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2620

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2625

7

2631

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2636

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2642

5

2457

7

2425

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2650

0

Branching Lower-A covers channels 1 (24577MHz) to 8 (24969MHz). Branching Upper-A covers channels 1’ (25585MHz) to8’ (25977MHz).Branching Lower-B covers channels 9 (25025MHz) to 16 (25417MHz). Branching Upper-B covers channels 9’ (26033MHz) to16’ (26425MHz).


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4 severity levels are defined; critical, major, minor and warning. For each alarm the severity level maybe changed by use of NEW-NMS SW. The default severity levels are shown in the table.

Alarm Name Description Severitylevel

BASEBANDLOS Loss of STM-1 input signal MAJORLOF Loss of Frame at STM-1 level. (One alarm for each direction) MAJORMS-AIS Alarm indication signal at STM-1 detected. (One alarm for each direction) WARNINGMS-AIS-INS Alarm indication signal at STM-1 inserted. (One alarm for each direction) MAJORMS-RDI Remote defect indicator detected. (One alarm for each direction) WARNING2M-WAYSIDE-INP Loss of 2Mbit wayside channel input signal. MINOR2M-WAYSIDE-AIS-INP AIS is detected on 2Mbit wayside channel. WARNINGTRELLIS-PLL Indicates that the Trellis encoder is out of lock. CRITICALRT-PLL The Radio Transmit PLL is out of lock. CRITICAL2M-SYNC Selected synchronisation for Line Transmit direction is missing. MINORLOC Loss of clock (SORP) CRITICALRS-TRACE-MISMATCH

Mismatch between configured string and received string. (One alarm for eachdirection)

MAJOR

BASEBANDDIRECTION RADIOTO LINELT-PLL The Line Transmit PLL is out of lock. CRITICAL2M-WAYSIDE-OUTP-AIS

AIS is detected on the Wayside channel output. WARNING

HBER Indicator for BER in configurable range 10-3 to 10-10. Default 10-3 MAJORLBER Indicator for BER in configurable range 10-3 to 10-11. Default 10-6 MINOREW-BER Indicator for BER in configurable range 10-3 to 10-12. Default >10-10 WARNINGRF-ID Wrong RF-ID received compared to configuration. MAJORMODULATORIF-MOD Loss of IF output CRITICALDEMODULATORIF-DEM Loss of IF input CRITICALOPTICAL INTERFACETX-OUT The output power has increased 2dB. CRITICALLASER-OFF The laser is off. It could be manual shutdown WARNINGBIAS The laser bias is out of limits. Sign of age and degradation WARNINGTRANSCEIVERIF-INP Loss of IF input. CRITICALRF-OUT The output power is low MAJORLOS Loss of RF input signal. MAJORRF-INPUT-WARNING The RF level is either above the upward fading threshold or the RF level is

below the down fading threshold.WARNING

LO Local Oscillator is out of lock. MAJORUNIT-ALM The transceiver is not responding MAJORATPC The regulation loop for the ATPC is not working. Software generated alarm

based on alarm condition on local and remote site.MINOR

RF-MUTE The RF output is muted WARNINGLOOPING-IF-EN The transceiver IF loop is enabled WARNINGLOOPING-RF-EN The transceiver RF loop is enabled WARNINGOTHER ALARMS



MEN-AT-WORK Software generated. Operator set men at work before doing repairs. WARNINGDROP-IN+48V The battery supply voltage is dropped below acceptable limit WARNINGBELOW+3.3V Voltage from the DC-DC converter in IDU is below limit WARNINGBELOW+5V Voltage from the DC-DC converter in IDU is below limit WARNINGBELOW+12V Voltage from the DC-DC converter in IDU is below limit WARNINGBELOW-5V Voltage from the DC-DC converter in IDU is below absolute value of limit WARNINGOVER-CURRENT An over current is detected. Will cut the power to the ODU. MAJORHC-LOOP TX Wayside channel looping at Tx is enabled. WARNINGHC-LOOP RX Wayside channel looping at Rx is enabled. WARNINGPRBS-INSERTED PRBS inserted on wayside channel WARNINGLOOPING_EN Looping in IDU is enabled WARNINGEVENT-LOG-EXC-LIMIT

Event log has exceeded the capacity threshold WARNING

DOWNLOAD-IN-PROGRESS

Download of software is under progress. WARNING

NEED_FREQUENCY The RF unit needs to be configured with Tx and Rx frequency. MAJOR

AUXILIARY ALARMSEXTERN-ALARM-1 Status on external alarm input # 1 WARNINGEXTERN-ALARM-2 Status on external alarm input # 2 WARNINGEXTERN-ALARM-3 Status on external alarm input # 3 WARNINGEXTERN-ALARM-4 Status on external alarm input # 4 WARNINGEXTERN-ALARM-5 Status on external alarm input # 5 WARNINGEXTERN-ALARM-6 Status on external alarm input # 6 WARNINGEXTERN-ALARM-7 Status on external alarm input # 7 WARNINGEXTERN-ALARM-8 Status on external alarm input # 8 WARNINGOUTPUT-ALARM-1 Status on external alarm output # 1 WARNINGOUTPUT-ALARM-2 Status on external alarm output # 2 WARNINGOUTPUT-ALARM-3 Status on external alarm output # 3 WARNINGOUTPUT-ALARM-4 Status on external alarm output # 4 WARNINGPERFORMANCEALARMS

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G826-THRESHOLD-15MIN-B1

If the current 15 minute period exceeds the set threshold for B1, this alarm isset. Cleared when new period starts.

WARNING

G826-THRESHOLD-15MIN-B2

If the current 15 minute period exceeds the set threshold for B2, this alarm isset. Cleared when new period starts.Only for MS termination.

WARNING

G826-THRESHOLD-15MIN-REI

If the current 15 minute period exceeds the set threshold for REI, this alarm isset. Cleared when new period starts.Only for MS termination.

WARNING

G826-THRESHOLD-24Hour-B1

If the current 24 hour period exceeds the set threshold for B1, this alarm is set.Cleared when new period starts.

WARNING

G826-THRESHOLD-24HOUR-B2

If the current 24 hour period exceeds the set threshold for B2, this alarm is set.Cleared when new period starts.Only for MS termination.

WARNING

G826-THRESHOLD-24HOUR-REI

If the current 24 hour period exceeds the set threshold for REI, this alarm isset. Cleared when new period starts.Only for MS termination.

WARNING

G826-THRESHOLD-MONTH-B1

If the current month period exceeds the set threshold for month, this alarm isset. Cleared when new period starts.

WARNING

G826-THRESHOLD-MONTH-REI

If the current month period exceeds the set threshold for REI, this alarm is set.Cleared when new period starts.Only for MS termination.

WARNING

G826-THRESHOLD-MONTH_B2

If the current month period exceeds the set threshold for month, this alarm isset. Cleared when new period starts.Only for MS termination.

WARNING



HOTSTANDBYALARMS

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HSB_RELAY_ALM Hot standby IDU switch relay mismatch CRITICALIDU_A_ACTIVE IIDU A is active in receiving direction INFOIDU_B_ACTIVE IDU B is active in receiving direction INFOLOOPING_CMI CMI loop enabled in hot standby switch unit. WARNINGLOOPING_WAY Wayside loop enabled in hot standby switch unit. WARNINGNO_CMI_LINE Loss of STM-1 user input signal at hot standby switch unit. WARNINGNO_WAYSIDE_LINE Loss of 2Mb/s wayside channel user input signal at hot standby switch unit. WARNINGCHANNEL_ACTIVE Indicates active transceiver, i.e. RF switch position. INFOCHANNEL_MAN Channel in manual mode WARNING

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Interface/functions: Standard. Availableoptions

STM-1, Electrical or Optical XData channel (1 x 64kbit/s, V.11) XWayside channel (2Mbit/s) XNetwork Interface (NI) XLAN interface XTCP/IP routing XQECC routing XParallel alarms, input/output XHot Standby XATPC XEmbedded SNMP XNEW – Configurator software (*) XNEW – NMS software (*) X SNMP agent X

(*) See also NEW-NMS documentation.

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