Operators-Manual VDL PDF

Approvals
TheequipmentisdesignedtomeettheessentialrequirementsofEuropeanDirectives1999/5/EC,
89/336EECasamendedbyDirective93/68/EECand72/23/EEC

Standards
Thefollowingstandardsareapplied:

EMC: EN301489Ͳ1,EN301489Ͳ22,ICRSS141issue1,
FCCpart15andpart87
HealthandSafety: EN60950,CSAͲC22.260950
Radiospecifications: EN300676(AM),EN301842Ͳ1(VDLmode2)

Foranupdatedlistofapprovalsandstatementsofconformity,theseareavailableon:

www.jotron.com
JotronAS|TR7750:OperatorshandbookÎIntroduction Pageii

Listofabbreviationsanddefinitions

BITE
BuiltInTestEquipment

bps
BitsPerSecond.

DSP
DigitalSignalProcessor

ETSI
EuropeanTelecommunicationStandardisationInstitute

ICAO
InternationalCivilAviationOrganization

IEC
InternationalElectroͲtechnicalCommission.

LAN
LocalAreaNetwork

PA
PowerAmplifier

PSU
PowerSupplyUnit.Separateunittopowertheequipment.

PTT
PushToTalk

RF
RadioFrequency

S/N
SIGNALͲTOͲNOISERATIO

SNMP
SimpleNetworkManagementProtocol,anetworkprotocolusedtocontroltheradioequipment.
ThisequipmentisdefinedasanAGENTinaSNMPsystem.

VSWR
VoltageStandingWaveRatio
JotronAS|TR7750:OperatorshandbookÎIntroduction Pageiii

NO INIT DATE PAGE(S) VERSION REASONFORCHANGE
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Theinformationinthisbookhasbeencarefullycheckedandisbelievedtobeaccurate.However,no
responsibilityisassumedforinaccuracies.
JotronASreservestherighttomakechangeswithoutfurthernoticetoanyproductsormodules
describedhereintoimprovereliability,functionordesign.JotronASdoesnotassumeanyliability
arisingoutoftheapplicationoruseofthedescribedproduct.
SAFETYINSTRUCTIONS
JotronAS|TR7750:OperatorshandbookÎIntroduction Pageiv

CAUTION!
ThisequipmentcontainsCMOSintegratedcircuits.Observehandlingprecautionstoavoidstatic
dischargeswhichmaydamagethesedevices.

WARNING!
SomeRFsemiconductordevicesusedinthisequipmentmaycontainBerylliumOxide.Ifinhaled,dust
fromthisoxidecanbetoxic.Nodangerwillarisefromnormalhandlingbutnoattemptshouldbe
madetotamperwiththesedevices.Onnoaccountmustthesetransistorsbedestroyedordiscarded
withindustrialordomesticwaste,butshouldbereturnedtothemanufacturersforsubsequent
disposal.
JotronAS|TR7750:OperatorshandbookÎIntroduction Pagev

TABLEOFCONTENTS
1 INTRODUCTION ....................................................................................................................... 1-1
1.1 MODELS COVERED BY THIS MANUAL ..................................................................................... 1-1
1.2 LAYOUT OF THE TRANSCEIVER .............................................................................................. 1-1
1.3 APPLICATIONS ........................................................................................................................ 1-2
2 TECHNICAL SPECIFICATIONS ............................................................................................ 2-1
2.1 GENERAL SPECIFICATION, TR-7750....................................................................................... 2-1
2.2 TRANSMITTER UNITS, TA-7650, TA-7625, TA-7610 ............................................................ 2-1
2.3 RECEIVER UNIT, RA-7203 ..................................................................................................... 2-2
2.4 POWER SUPPLY UNIT, PSU-7002 ........................................................................................... 2-2
3 FUNCTIONAL DESCRIPTION ............................................................................................... 3-1
3.1 FRONT PANEL CONTROLS, TRANSMITTER UNIT .................................................................... 3-1
3.1.1 Display ............................................................................................................................ 3-1
3.1.2 Scroll/Select switch and Navigation buttons A,B and C ................................................. 3-1
3.1.3 PTT button ...................................................................................................................... 3-1
3.1.4 ON/OFF button............................................................................................................... 3-1
3.1.5 LED Indicators ............................................................................................................... 3-2
3.1.6 Mic/Headset connector ................................................................................................... 3-3
3.2 TRANSMITTER, REAR CONNECTIONS ...................................................................................... 3-4
3.2.1 Antenna connector (50 ohm N) ....................................................................................... 3-4
3.2.2 Receiver ant. Connector (50 ohm BNC) ......................................................................... 3-4
3.2.3 DC input connector (Type – rating) ............................................................................... 3-4
3.2.4 LAN connector (RJ45) .................................................................................................... 3-4
3.2.5 AUX1 CONNECTOR (RJ45) .......................................................................................... 3-5
3.2.6 AUX2 connector (RJ45) .................................................................................................. 3-6
3.2.7 REM connector (RJ45) ................................................................................................... 3-6
3.2.8 Rx connector (RJ45) ....................................................................................................... 3-7
3.3 FRONT PANEL CONTROLS, RECEIVER UNIT ........................................................................... 3-8
3.3.1 Display ............................................................................................................................ 3-8
3.3.2 Scroll/Select switch and Navigation buttons A, B and C ................................................ 3-8
3.3.3 ON/OFF button............................................................................................................... 3-8
3.3.4 LED Indicators ............................................................................................................... 3-8
3.3.5 Headset connector .......................................................................................................... 3-9
3.4 RECEIVER, REAR CONNECTIONS ........................................................................................... 3-10
3.4.1 Antenna connector (50 ohm N) ..................................................................................... 3-10
3.4.2 DC input connector (Type – rating) ............................................................................. 3-10
3.4.3 LAN connector (RJ45) .................................................................................................. 3-11
3.4.4 AUX1 CONNECTOR (RJ45) ........................................................................................ 3-11
3.4.5 AUX2 connector (RJ45) ................................................................................................ 3-12
3.4.6 REM connector (RJ45) ................................................................................................. 3-12
3.5 PSU-7002, POWER SUPPLY UNIT, FRONTVIEW .................................................................... 3-13
3.5.1 LED Indicators ............................................................................................................. 3-13
3.6 POWER SUPPLY UNIT REAR CONNECTORS. .......................................................................... 3-14
3.6.1 DC input connector....................................................................................................... 3-14
3.6.2 DC Output Connector ................................................................................................... 3-14
3.6.3 AC Input connector ....................................................................................................... 3-15
4 INSTALLATION ........................................................................................................................ 4-1
4.1 INTRODUCTION....................................................................................................................... 4-1
JotronAS|TR7750:OperatorshandbookÎIntroduction Pagevi

4.2 INITIAL INSPECTION ............................................................................................................... 4-1
4.3 INSTALLATION INTO EQUIPMENT CABINET ............................................................................ 4-2
4.4 ANTENNA CONNECTORS......................................................................................................... 4-2
4.5 AC AND DC CONNECTORS ..................................................................................................... 4-2
4.6 REMOTE SIGNALS ................................................................................................................... 4-2
4.6.1 REM connector (receiver) and RX connector (transmitter) ........................................... 4-3
4.6.2 Audio in/out and Line loop keying .................................................................................. 4-5
4.6.3 Other key signals ............................................................................................................ 4-9
4.6.4 Squelch and AGC signals, receiver unit ....................................................................... 4-11
4.6.5 Alarm and Select signals transmitter and receiver ....................................................... 4-13
4.6.6 Miscellaneous signals, transmitter ............................................................................... 4-15
4.7 APPLICATIONS ...................................................................................................................... 4-17
4.7.1 Transceiver, local configuration .................................................................................. 4-17
4.7.2 Transceiver, remote configuration ............................................................................... 4-19
4.7.3 Transmitter, main / backup configuration .................................................................... 4-22
4.7.4 Receiver, main / backup configuration ......................................................................... 4-23
4.7.5 AM data operation (ACARS) ........................................................................................ 4-24
4.7.6 VDL mode 2 data operation (as part of a VHF Ground Station) ................................. 4-24
5 OPERATING INSTRUCTIONS ............................................................................................... 5-1
5.1 INTRODUCTION....................................................................................................................... 5-1
5.2 USER MENU – TRANSMITTER (RESTRICTED ACCESS LEVEL) .................................................. 5-3
5.3 USER MENU – TRANSMITTER (DEFAULT ACCESS LEVEL)....................................................... 5-4
5.4 SETTING, INFORMATION AND CONFIGURATION MENUS – TRANSMITTER............................... 5-5
5.4.1 Radio control group ........................................................................................................ 5-6
5.4.2 TX config group .............................................................................................................. 5-6
5.4.3 Interface config group .................................................................................................... 5-7
5.4.4 Bite system group ............................................................................................................ 5-8
5.4.5 System info group ........................................................................................................... 5-8
5.5 PARAMETER DETAILS – TRANSMITTER .................................................................................. 5-9
5.5.1 Radio control group ........................................................................................................ 5-9
5.5.2 TX config group .............................................................................................................. 5-9
5.5.3 Interface config group .................................................................................................. 5-13
5.5.4 Bite system group .......................................................................................................... 5-15
5.6 USER MENU – RECEIVER (RESTRICTED ACCESS LEVEL)....................................................... 5-16
5.7 USER MENU – RECEIVER (DEFAULT ACCESS LEVEL) ........................................................... 5-17
5.8 SETTING, INFORMATION AND CONFIGURATION MENUS – RECEIVER.................................... 5-18
5.8.1 Radio control group ...................................................................................................... 5-19
5.8.2 RX config group ............................................................................................................ 5-19
5.8.5 System info group ......................................................................................................... 5-21
5.9 PARAMETER DETAILS – RECEIVER ....................................................................................... 5-22
5.9.1 Radio control group ...................................................................................................... 5-22
5.9.2 RX config group ............................................................................................................ 5-23
6 ERROR CONDITIONS AND CORRECTIVE ACTIONS ..................................................... 6-1
6.1 TRANSMITTER ERROR CONDITIONS ........................................................................................ 6-1
6.2 RECEIVER ERROR CONDITIONS............................................................................................... 6-5
JotronAS|TR7750:OperatorshandbookÎIntroduction Pagevii

7 LIST OF TABLES AND FIGURES .......................................................................................... 7-1

JotronAS|TR7750:OperatorshandbookÎIntroduction Pageviii

1 Introduction
1.1 Modelscoveredbythismanual

Thefollowingmodels/variantsarecoveredbythisoperator’smanual

Model P/N Containunits Output Frequencyrange Modes
TRͲ7750*, XͲxxxx RAͲ7203,TAͲ7650, 50Watts 118Ͳ137(156) AM,(D8PSK)
Transceiver PSUͲ7002 MHz
TRͲ7725,Transceiver XͲxxxx RAͲ7203,TAͲ7625, 25Watts 118Ͳ137(156) AM,(D8PSK)
PSUͲ7002 MHz
TRͲ7710,Transceiver XͲxxxx RAͲ7203,TAͲ7610, 50Watts 118Ͳ137(156) AM,(D8PSK)
PSUͲ7002 MHz
TAͲ7650*, XͲxxxx TAͲ7650,PSUͲ 50Watts 118Ͳ137(156) AM,(D8PSK)
Transmitter 7002 MHz
TAͲ7625,Transmitter XͲxxxx TAͲ7625,PSUͲ 25Watts 118Ͳ137(156) AM,(D8PSK)
7002 MHz
TAͲ7610,Transmitter XͲxxxx TAͲ7610,PSUͲ 10Watts 118Ͳ137(156) AM,(D8PSK)
7002 MHz
RAͲ7203,Receiver XͲxxxx RAͲ7203 N/A 118Ͳ137(156) AM,(D8PSK)
MHz
Table1.1Ͳ1,Radiomodels
*NotavailableinUSAduetoFCCrestrictionsonpoweroutput.

Throughoutthismanual,transmitterunit,TX,TAͲ7650orTAͲ76xxreferstoanyofthethreedifferent
powervariantsofthetransmitter(TAͲ7650,TAͲ7625orTAͲ7610)unlessotherwisenoted.Theterm
transceiver,TR,TRͲ7750orTRͲ77xxreferstoanyvariantofthetransceiverunlessspecificallynoted
inthetextandthetermreceiver,RXandRAͲ7203isusedforthereceiverunit(RAͲ7203).
Theoperatingproceduresforthedifferentmodelsareequivalent,exceptthemaximumoutput
power.
1.2 Layoutofthetransceiver

Thereceiverunit,RAͲ7203operatesasanindependentreceiver.ThetransmitterunitTAͲ7650
operatesasanindependenttransmitter,butrequiresthepowersupplyunit,PSUͲ7002foroperation
onACpower.Thereceiverandtransmitterunitsmaybeplacedinentirelydifferentlocationsor
togetherwhenconfiguredasatransceiver.
Figure1.1,CompleteTransceiver,RAͲ7203,TAͲ7650andPSUͲ7002
JotronAS|TR7750:OperatorshandbookÎIntroduction Page1Ͳ1

1.3 Applications
ThetransmitterTAͲ7650andthereceiverRAͲ7203canbeusedeitherasastandalonetransmitters/
receiversforgroundtoairvoiceordatacommunication,orcombinedasatransceiver.
Thetransmitter/receivercanbeoperatedinthefollowingmodes:
x LocallyasananalogueAMtransceiver,withmicrophoneandheadphoneconnectedtothe
frontpanelconnector,
x ConnectedtoaVCS(VoiceControlSystem)using600Ͳohmanaloguelinesforaudio,together
withkeyinginformofinbandtones,externalvoltagesorphantomkeying.
x ConnectedtoaVDL(VHFgroundstation)systemasadatamodem,usingeitherAMdata
(ACARS)orVDLmode2.
x Inadditionthetransmitter/receiverhasalargerangeofoptionsforremotecontrolusing
Ethernet,seriallinesorfrontpanelcontrols.
JotronAS|TR7750:OperatorshandbookÎIntroduction Page1Ͳ2

2 TechnicalSPECIFICATIONS
2.1 Generalspecification,TRǦ7750
Standards ICAOannex10,EN300676(AM,AMͲMSK),EN301841(VDL2– Physicallayer)
Environmental,allunits
TemperaturerangeͲ 20°Cto+55°C(operating)Ͳ40°Cto+70°C(storage)
Humidity 90%@+40°C(noncondensing)
Shock Transport:IECͲ721Ͳ3Ͳ2,Class2M3
Vibration Transport:IECͲ68Ͳ2Ͳ32,Class2M3.IECͲ68Ͳ2Ͳ6
EMC EN301489–part22,FCC,IC
General,allunits AM25kHz AM8.33kHz AMMSK D8PSK

Frequencyrange 118Ͳ137MHz(118Ͳ156MHzoptional)
RFModes 6K80A3EJN 5K00A3EJN 13K0A2D 14K0G1DE
Keyingtime <1.0ms <1.0ms <1.0ms <1.0ms
Bitrate 2.4kbit/s 31.5kbit/s
Frequencyresponse 300Ͳ3400Hz 350Ͳ2500Hz
Dataports RS232,RS485,100BaseT
Protocols SimpleNetworkManagementProtocol(SNMPv.2),RS232,RS485;SeeProtocoldescription
BITEmonitoring VSWR,Voltages,Currents,Levels,Lockdetect,
Temperature,Outputpower,Reflectedpower,a.o.
Supplyvoltage,AC 115/230VAC+15/Ͳ10%/50Ͳ60Hz
Supplyvoltage,DC 21.6Ͳ31.2VDCnegativeground
MTBF >10years/unit
MTTR <30minutesatlowestreplaceableunit

2.2 TransmitterUnits,TAǦ7650,TAǦ7625,TAǦ7610
Transmitterunit AM25kHz AM8.33kHz AMMSK D8PSK
Outputpower Minimum1W,Maximum50,25or10Wdependingonmodel Max25W
Adjacentchannelpower >75dBc >65dBc >75dBc >65dBc
Modulationlevel upto95%
Distortion <5%
Lineinput 600:,Ͳ36Ͳ+10dBm
Intermodulationprotection >40dBwheninterferingsignalisdecoupledwithatleast30dB
Txtimeout 10sto5minin10sstep
Inbandkeying Userconfigurabletones:100Ͳ5000Hz
Carrieroffset 2,3,4or5 2
Differentialgroupdelay <60Ps
Powerriseandreleasetime <190Ps,<300Ps
Systemconstellationerror EVM<3%
VSWR 1:Infinity
Dutycycle 100%continuousoperation@ambientbelow40°C
Powerconsumption <280VA
DimensionTransmitternit 142mm(28TE)(W)*230mm(D)*128mm(H), Weight 3.0kg

Minimum1W,Maximum50,25or10Wdependingonmodel
JotronAS|TR7750:OperatorshandbookÎTechnicalSPECIFICATIONS Page2Ͳ1

2.3 ReceiverUnit,RAǦ7203

Receiverunit AM25kHz AM8.33kHz AMMSK D8PSK
Sensitivity,AM@1PV/30%pd 10dBSINAD(CCITT)
Ͳ3
SensitivityVDL(BER>10 ) <Ͳ103dBm
Adjacentchannelrejection >75dB >65dB >75dB >70dB@2.ch
Intermodulation(3signal) >70dBc >Ͳ28dBm
IFbandwidth +/Ͳ11kHz +/Ͳ3.5kHz +/Ͳ11kHz +/Ͳ11kHz
ImageandIFfrequency >110dB
Squelchoperation AdjustableͲ107dBm,30dB
S/N+carrieroverride
Activationtime<20ms
Hysteresis<3dB
AudioAGC 30%Ͳ90%,<1dBvariation
Signal/Noise >45dBonanyoutput@100PV,30%
AGCrangeͲ 107dBmto+5dBm
AGCattachtime <50ms <40ms
AGCdecaytime <200ms <50ms
Differentialgroupdelay <60Ps
Inbandsquelchsignal Configurabletones:150Ͳ3400Hz
Lineoutput 600:,Ͳ36Ͳ+10dBm@90%modulation
Harmonicdistortion <5%@90%AM(lineoutput)
Crossmodulation >85dB@100kHzfrequencyoffset
Blocking >100dB@1MHzoffset,>110dBoutofbandsignals
Dynamicrange >110dB
Spuriousresponserejection >90dB
Weight 1.7kg
DimensionReceiverunit 71mm(14TE)(W)*230mm(D)*128mm(H)

2.4 PowerSupplyUnit,PSUǦ7002

Powersupplyunit
Supplyvoltage,AC 115/230VAC+15/Ͳ10%/50Ͳ60Hz
Outputvoltage +28VDCregulated
DCthroughput WhenACnotpresent
Maxload 10Aaverage,18Apeak(300W)
DimensionPSUunit 71mm(14TE)(W)*303mm(D)*128mm(H)
Weight 1.3Kg
JotronAS|TR7750:OperatorshandbookÎTechnicalSPECIFICATIONS Page2Ͳ2

3 Functionaldescription
3.1 FrontPanelControls,Transmitterunit

Navigation Display
button A
Navigation
PTT button button B
Navigation
Scroll / Select button C
Switch
ON/OFF
button
Indicators:
LOW: Transmits in low power
Indicators:
AL: Alarm active (red)
OUT: Output power indicator
REM: Remote ready (green)
SWR: High SWR indicator
STBY: Standby (yellow)
Mic/Headset
connector

Figure3.1Ͳ1,Frontview,transmitterunit,TAͲ7650/25/10
3.1.1 Display
Thedisplayshowsthemostimportantoperationalparameters;Frequencyandmodulation.In
addition,thedisplaywillshowvariousmenus,submenusandoperationalparameterswhenentering
intothemenuusingNavigationbuttonA.
3.1.2 Scroll/SelectswitchandNavigationbuttonsA,BandC
Thenavigationbuttons,A,BandC,togetherwiththeScroll/Selectswitchareusedtonavigate
throughthemenus.
TheScroll/Selectswitchhasthreeactions:Itcanbeturnedclockwise,antiͲclockwise,ormomentarily
pressed.
Ingeneraltheuseofthenavigationbuttonsare:
AorScroll/Selectright:Increaseavalue(up)
BorScroll/Selectleft: Decreaseavalue(down)
CorScroll/Selectpress:ConfirmorEnter.
Theuserinterfacewillindicatewhichnavigationbuttontouse.
3.1.3 PTTbutton
Thisbuttonisusedtoimmediatelykeythetransmitterfortest/measurementpurposes,connected
togetherwiththePTTlineavailableonthemicrophoneconnector.
3.1.4 ON/OFFbutton
Pressandholdbutton(forapp.2s)toswitchunitONorOFF.
JotronAS|TR7750:OperatorshandbookÎFunctionaldescription Page3Ͳ1

3.1.5 LEDIndicators
LOW(yellow): Thetransmittertransmitsinlowpower,eithercausedbyaninternalfailure
(SWR,Temperature,orlowinputvoltage)orsetbytheuser.Thelowpower
levelisadjustable.
AL(red): Indicatesthatanalarmispresentinthetransmitterunit.Detailsofthealarm
willbeshownonthedisplay.
REM(green): ThisLEDhasmultiplefunctions.TheREMOTEindicatorwillbelitwitha
constantgreencolorwhenthetransmitteris“ready”forremoteoperation.
Readymeansthatthekeyingoptionshasbeensettoincludekeyingfroman
externalsource,andthatthevoiceinputhasbeensettoanexternalsource
(600ohmlineinput).
InadditiontheREMOTEindicatorwillflashyelloweachtimetheunitis
communicatingoneitheroftheremoteinterfaces(RS232,RS485or
Ethernet).
STBY(yellow): Thetransmitteriskeptinstandby,eitherbyuserinput,anexternalsignalto
theremoteinterfaceorbecauseanalarmconditionhasbeendetected,and
thetransmitterissetupasaMAINtransmitter.
OUT(yellow): Indicatethatthetransmitteriskeyedandpowerisbeinggenerated.
SWR(red): IndicatethattheSWRontheantennaisabovethethresholdvalue(app.3:1).
Thetransmitterwillreducetheoutputpowertothepredefinedlowpower
levelinordertoprotecttheoutputstage.

3.1.6 Mic/Headsetconnector

Mic/Headsetconnector
Name PIN Purpose
Micinput 1 Dynamic.Sensitivity2.5mVnominal.
MicGND 2 Referenceinputformicsignal

Headsetoutput,containssidetoneand/orreceived
Headset 3
audiowhenusedwithareceiver(RA7203)

RS232 4 RS232TX

RS232 5 RS232RX

PTT 6 PTTinput.ConnecttoGND(p.8)tokey

+12VDC 7 +12VDCtomic.Amplifier(10mA)
GND 8 Commonground
Table3.1Ͳ1,Mic/Headsetconnector,transmitter,pinout

TheMic/Headsetconnectorisusedformultiplepurposes.Firstitisusedtoconnectamicrophone
and/oraheadsettothefrontpanelofthetransmitterforlocaloperation.Theheadsetoutput
containsthesidetonegeneratedfromtheoutputofthetransmittertogetherwiththereceivedaudio
whenthetransmitterisnotkeyed.
Thereceivedaudioisonlyavailablewhenatransmitterandareceiverunitareinterconnectedbythe
T/Rbusavailableontherearpanels.

InadditiontheMic/HeadsetconnectorhasaRS232seriallinethatcanbeusedtocontrolradio
parametersfromanexternalunit,ortouploadnewfirmwareintotheradiounitforfutureupgrades.


3.2 Transmitter,rearconnections

Figure3.2Ͳ1,Rearview,transmitterunit,TAͲ7650/25/10.
3.2.1 Antennaconnector(50ohmN)
Interfacetotheantennacableforthetransmitterorthetransceiverwhenusedtogetherwitha
receiverunit
3.2.2 Receiverant.Connector(50ohmBNC)
BNCͲTypeantennaoutput–50ohm.Thisconnecorisconnectedtotheantennarelayinternallyin
thetransmitterunitandcanbeconnecteddirectlytotheantennainputofamatingreceiverunit
(RA7203).
3.2.3 DCinputconnector(Type–rating)

Figure3.2Ͳ2,TransmitterDCinputconnector,rearview
ConnectorforDCsupply(21.6Ͳ31.2VDC).
Connectedtothematingpowersupply,PSUͲ7002,ortoanexternalDCsupply.
Aisthepositive(+)connectionandBisthenegative(Ͳ)connectionpoints.
3.2.4 LANconnector(RJ45)

ThisconnectorcontainstheEthernetbusandisnormallyconnectedtoanearbyswitch/hub.Itcan
alsobeconnecteddirectlytoacomputer,usingatwistedpairEthernetcable.
LANinterfaceconnector

Name PIN Purpose
LAN_TXP 1 Txdata
LAN_TXN 2 Txdata
LAN_RXP 3 Rxdata
LAN_D3P 4 Optional
LAN_D3N 5 Optional
LAN_RXN 6 Rxdata
LAN_D4P 7 Optional
LAN_D4N 8 Optional
Table3.2Ͳ1,LANinterfaceconnector,pinout
3.2.5 AUX1CONNECTOR(RJ45)
Thisconnectorisnormallyconnectedtoequipmentusedforremotecontrol/remotesupervisionof
thetransmitter.
AUX1connector,transmitterAUX

Name PIN Purpose
ALARM_P 1 AlarmoutͲrelay(NO)
ALARM_N 2 AlarmoutͲrelay(NO)
Select_in_P 3 Selectin,optocouplerinput
RS232_S 4 RS232Transmitdata
RS232_R 5 RS232Receivedata
Select_in_N 6 Selectin,optocouplerinput
+12V 7 +12VDCoutputtoexternalequipment(max300mA)
GND 8 Commonground
Table3.2Ͳ2,AUX1connector,transmitter,pinout

3.2.6 AUX2connector(RJ45)
thetransmitter.

AUX2connector,transmitter
Name PIN Purpose
KEY_OUT_P 1 Closed=Transmitting,optocoupleroutput
KEY_OUT_N 2 Closed=Transmitting,optocoupleroutput
MONITOR_P 3 Monitoroutputtotaperecorder
TXLOW_P 4 Applyingavoltage>5VDCbetweenpin4and5
forcesthetransmitterintolowpower
TXLOW_N 5 Applyingavoltage>5VDCbetweenpin4and5
forcesthetransmitterintolowpower
MONITOR_N 6 Monitoroutputtotaperecorder
TXKEY_P 7 Applyingavoltage>5VDCbetweenpin7and8will
keythetransmitter
TXKEY_N 8 Applyingavoltage>5VDCbetweenpin7and8will
keythetransmitter
Table3.2Ͳ3,AUX2connector,transmitter,pinout
3.2.7 REMconnector(RJ45)
thetransmitter.Itcontainsthemostbasicinterfacesusedforremotecontrol,andwillinmanycases
betheonlyconnectorused.
Notethatthisconnectorwillalsohavethemostbasicfunctionalityforremotecontrollingthe
receiverwhentheRxconnectorisconnectedtoareceiver.Inthiscasetheline,andsquelchout
signalsfromthereceiverarereflectedalsoontheREMconnector.
REMconnector,transmitter–Remotecontroloftransceiver
Name PIN Purpose
RS485_Z 1 RS485(Ͳ)
RS485_Y 2 RS485(+)
LINE_P 3 Diff.lineinput/outputtoTA/RA,600ohm
TX_KEY_G 4 Groundingthispinwillkeytransmitter
RX_BUSY_OUT 5 RXBusyindicatoroutput(squelchindicator)
LINE_N 6 Diff.lineinput/outputtoTA/RA,600ohm
ALARM 7 Low=Alarm(TAorTA/RA)
GND 8 Commonground
Table3.2Ͳ4,REMconnector,transmitter,pinout

3.2.8 Rxconnector(RJ45)
Thisconnectorisnormallyconnectedtoamatingreceiverwhenusedinatransceiverconfiguration.
Itgivesfunctionalitytoatransceiversuchas:Common2wirelineinterface,receivedaudioin
transmitterlocalheadset,transceiveralarm,TX/RXbusysignalingwhenusedasaVDLmodem.

Rxconnector,transmitter.InterfacetoRX(transceiverconfig)
Name PIN Purpose
RS485_Z 1 RS485(Ͳ)
RS485_Y 2 RS485(+)
LINE_P 3 Diff.lineinputfromReceiverunit,600ohm
TX_BUSY 4 TXBusyindicatoroutput(Muteoutput)
RX_BUSY 5 RXBusyoptocouplerͲinput(Repeaterkeyinput)
LINE_N 6 Diff.lineinputfromReceiverunit,600ohm
INT_ALARM 7 Low=Alarm(Note:I/O–lowinputwillalsobe
recognizedasanalarm(EXT))
GND 8 Commonground
Table3.2Ͳ5,Rxconnector,transmitter,pinout

3.3 FrontPanelControls,Receiverunit
Navigation
Display
button A
Scroll / Select Navigation

Switch button B
Indicators: Sq / Navigation
SQ: Squelch open (yellow) button C
AL: Alarm active (red)
REM: Remote ready (green)
STBY: Standby (yellow) ON/OFF
button
Headset
connector Loudspeaker

Figure3.3Ͳ1,Frontview,receiverunit,RAͲ7203
3.3.1 Display
Thedisplayshowsthemostimportantoperationalparameters;Frequencyandmodulation.In
addition,thedisplaywillshowvariousmenus,submenusandoperationalparameterswhenentering
intothemenuusingNavigationbuttonA.
3.3.2 Scroll/SelectswitchandNavigationbuttonsA,BandC
Thenavigationbuttons,A,BandC,togetherwiththeScroll/Selectswitchareusedtonavigate
throughthemenus.
TheScroll/Selectswitchhasthreeactions:Itcanbeturnedclockwise,antiͲclockwise,ormomentarily
pressedin.
Ingeneraltheuseofthenavigationbuttonsare:

AorScroll/Selectright:Increaseavalue(up)
BorScroll/Selectleft: Decreaseavalue(down)
CorScroll/Selectpress:ConfirmorEnter.

Theuserinterfacewillindicatewhichnavigationbuttontouse.
NavigationbuttonCisdedicatedtosquelchON/OFFbuttoninthedefaultview.
3.3.3 ON/OFFbutton
Pressandholdbutton(forapp.2s)toswitchunitONorOFF.
3.3.4 LEDIndicators

SQ(yellow): Thereceiversquelchisopenwhenlit.

AL(red): Indicatesthatanalarmispresentinthetransmitterunit.Detailsofthealarm
willbeshownonthedisplay.

REM(green): ThisLEDhasmultiplefunctions.TheREMOTEindicatorwillbelitwitha
constantgreencolorwhenthereceiveris“ready”forremoteoperation.
Readymeansthattheaudioisoutputtoanexternalsource(600ohmline
input).
InadditiontheREMOTEindicatorwillflashyelloweachtimetheunitis
communicatingoneitheroftheremoteinterfaces(RS232,RS485or
Ethernet).

STBY(yellow): Thereceiveriskeptinstandby,eitherbyuserinput,anexternalsignaltothe
remoteinterfaceorbecauseanalarmconditionhasbeendetected,andthe
receiverissetupasaMAINreceiver.
3.3.5 Headsetconnector

Mic/Headsetconnector
Name PIN Purpose
N/C 1 Noconnection
N/C 2 Noconnection

Headset 3 Headsetoutputcontainsreceivedaudio.

RS232 4 RS232TX

RS232 5 RS232RX

N/C 6 Noconnection

+12VDC 7 +12VDCtoexternalamplifier(10mA)
GND 8 Commonground
Table3.3Ͳ1,Headsetconnector,receiver,pinout

TheHeadsetconnectorisusedformultiplepurposes.Firstitisusedtoconnectaheadsettothefront
panelofthereceiverforlocaloperation.Theheadsetoutputcontainsreceivedaudiowhenthe
squelchisopen.
InadditiontheHeadsetconnectorhasaRS232seriallinethatcanbeusedtocontrolradio
parametersfromanexternalunit,ortouploadnewfirmwareintotheradiounitforfutureupgrades.

3.4 Receiver,rearconnections

Figure3.4Ͳ1,Rearview,receiverunit,RAͲ7203.
3.4.1 Antennaconnector(50ohmN)
Connectdirectlytoareceiverantenna,ortothereceiverantennaconnector(BNC)onthe
transmitterunit.
3.4.2 DCinputconnector(Type–rating)

Figure3.4Ͳ2,ReceiverDCinputconnector,rearview

ConnectorforDCsupply(21.6Ͳ31.2VDC).
ConnecttoanoptionalexternalDCsupplytooperatetheunitonDCorasabackupsupplyifthe
mainACfails.
Aisthepositive(+)connectionandBisconnectedtogroundorchassis(Ͳ).

3.4.3 LANconnector(RJ45)

ThisconnectorcontainstheEthernetbusandisnormallyconnectedtoanearbyswitch/hub.Itcan
alsobeconnecteddirectlytoacomputer,usingatwistedpairEthernetcable.
LANinterfaceconnector
Name PIN Purpose
LAN_TXP 1 Txdata
LAN_TXN 2 Txdata
LAN_RXP 3 Rxdata
LAN_D3P 4 Optional
LAN_D3N 5 Optional
LAN_RXN 6 Rxdata
LAN_D4P 7 Optional
LAN_D4N 8 Optional
Table3.4Ͳ1,LANinterfaceconnector,pinout
3.4.4 AUX1CONNECTOR(RJ45)

thereceiver.

AUX1connector,receiverunit
Name PIN Purpose
ALARM_P 1 AlarmoutͲrelay(NO)
ALARM_N 2 AlarmoutͲrelay(NO)
Select_in_P 3 Selectin,optocouplerinput
RS232_S 4 RS232Transmitdata
RS232_R 5 RS232Receivedata
Select_in_N 6 Selectin,optocouplerinput
+12V 7 +12VDCoutputtoexternalequipment(max100mA)
GND 8 Commonground
Table3.4Ͳ2,AUX1connector,receiver,pinout

3.4.5 AUX2connector(RJ45)

thetransmitter.

AUX2connector,receiverunit
Name PIN Purpose
Squelch_out_P 1 Closed=Receiving(Sqopen),optocoupleroutput
Squelch_out_N 2 Closed=Receiving(Sqopen),optocoupleroutput
AGC_HILO_P 3 Hi/Looutputdependingonsignalstrength,
optocoupleroutput
N/C 4
N/C 5
AGC_HILO_N 6 Hi/Looutputdependingonsignalstrength
AGC_OUT 7 AGCanaloguevoltageoutput,dependingonsignal
strength.ReferredtoGND
GND 8 CommonGND(reference)
Table3.4Ͳ3,AUX2connector,receiver,pinout
3.4.6 REMconnector(RJ45)

Thisconnectorisnormallyconnectedtoamatingtransmitterunitwhenusedinatransceiver
configuration,ortootherequipmentusedforremotecontrolofthereceiver.
Whenconnectedtoatransmitter,theconnectorgives“transceiver”functionalitytothetransmitter
andcontainsnecessarysignalsforaudioandcontrol.TheTX_BUSYandRX_BUSYsignalsarealsoused
inVDLmode2configurationtosignalthatthetransmitterorreceiverisbusytransferringdata.
InterfacetoRemoteequipmentoratransmitterunit
Name PIN Purpose
RS485_Z 1 RS485(Ͳ)
RS485_Y 2 RS485(+)
LINE_P 3 LineoutputfromReceiverunit,600ohm
TX_BUSY 4 TXBusyindicatorinput(Muteinput)
RX_BUSY 5 RXBusyoutput
LINE_N 6 LineoutputfromReceiverunit,600ohm
INT_ALARM 7 Low=Alarm(Note:I/O–lowinputwillalsobe
recognizedasanalarm(EXT))
GND 8 Commonground
Table3.4Ͳ4,REMconnector,receiver,pinout

3.5 PSUǦ7002,PowerSupplyUnit,frontview
Indicators:
AC: Operating on AC
ON: ON (DC output)

Figure3.5Ͳ1,PSUͲ7002,frontview
3.5.1 LEDIndicators

AC(yellow): IndicatesthatACispresent,andthattheunitcurrentlyisoperatingonthe
mainACpowersupply.
ON(green): IndicatesthatthePSUisONanddeliversDConitsoutput.
TheDCiseitherderivedfromthemainACinput(shownbytheACindicator),
orfromthebackupDCinput(ACindicatordark).

3.6 PowerSupplyUnitrearconnectors.

Figure3.6Ͳ1,PowersupplyunitͲrearview
3.6.1 DCinputconnector
TheDCinputisconnectedtotheDCbackupsupply(ifavailable).
Inputrangeis21.6Ͳ31.2VDCandcurrentconsumptionismax10Aaveragewhenthetransmitter
operateswithfullpoweroutput(50W).
Aisthepositive(+)connectionandBisconnectedtoground(Ͳ).

Figure3.6Ͳ2,DCinputconnector,PSU

3.6.2 DCOutputConnector
TheDCoutputconnectorisconnectedtothetransmitterunitandcontainsthe+28VDCsupplyfor
thetransmitter.TheDCisgeneratedfromthemainACinputortheDCbackupinput.

Figure3.6Ͳ3,DCoutput,PSU
Aisthepositiveconnectorpin(+)andBisconnectedtoground(Ͳ).

3.6.3 ACInputconnector

Figure3.6Ͳ4,ACinputconnector,PSU

InputforexternalAC.
ACisinputbetweenAandC,Bischassisground.
Thevoltagerangeisfrom85to250VAC

4 Installation
4.1 Introduction.

Theproceduresforinstallingtheradiounits/transceiveraredescribedintable4.1below.
Itisrecommendedthattheseproceduresarecompletedintheordershown.

Procedure Reference
1 Initialinspection 4.2
2 Installequipmentinto19”subracks(equipmentcabinet) 4.3
3 Connectchassisstudtosystemearthorcabinet Figure3.2Ͳ1
(TX)Figure
3.4Ͳ1(RX)
Figure3.6Ͳ1
(PSU)
4 Connectremoteconnectorsasrequired 4.6
5 Connectantennaconnectors 4.4
6 ConnectDCsupply(ifrequired) 4.5
7 ConnectACsupply(ifrequired 4.5
Table4.1Ͳ1,Installationprocedures
4.2 Initialinspection

ItemsincludedforaTAͲ7650transmitter P/N
1
1 RadiounitTAͲ7610,TAͲ7625orTAͲ7650 84205
2 PowersupplyunitPSUͲ7002 82417
3 InterconnectingcordbetweenTAandPSU 81725
4 CDwithOperatorsguide 84417
5 DCconnector 96715
6 ACpowercord 92375

ItemsincludedforaRAͲ7203receiver P/N
1 RadiounitRAͲ72032 84500
2 CDwithOperatorsguide 84417
3 DCconnector 96715
4 ACpowercord 92375
Onreceiptoftheradiounits,removealltransitpackagingandcheckthatthereisnodamagetothe
equipment.Ifdamageisevident,contactJotronimmediatelyandretaintheoriginaltransit
packaging.
1
Variantsmayinclude:Ͳ Max.powerlevel10,25or50W(variants:TA7610,TA7625orTA7650)
Ͳ AMand/orAMͲMSKand/orVDLmode2modulation
Ͳ Extendedfrequencyrangebelowand/orabove118Ͳ137MHz
Ͳ OffsetoperationforAMvoice–upto5carrieroffset.
Ͳ Inbandpttsignalling
2
Variantsmayinclude:Ͳ AMand/orAMͲMSKand/orVDLmode2modulation
Ͳ Extendedfrequencyrangebelowand/orabove118Ͳ137MHz
Ͳ Inbandsquelchsignalling
JotronAS|TR7750:OperatorshandbookÎInstallation Page4Ͳ1

4.3 Installationintoequipmentcabinet
Theunitsmaybeinstalledintoastandard19”subrackwithaheightof3U.
Thetotalsubrackisdividedinto84TEunits.Thetransmitteroccupies28TE,thePSUoccupies14TE
andthereceiverunitoccupies14TE.
Foratransceiverthisleavesafreespaceof28TEavailableforotherequipment.
Figure4.3Ͳ1showssomeexamplesforinstallationinto19”subrack.Fromtoptobottomthefigure
shows:6receiversinonesubrack,2transmitterswithPSUinonesubrackand3transmitterswithout
PSU(operatedonDC)inonesubrack.

Figure4.3Ͳ1,Examplesofvariousconfigurations
4.4 Antennaconnectors
TheantennashouldbeofgoodqualitywithregardstogainandVSWRtoobtainmaximum
performance.MakesurethattheVSWRontheantennaislow,andthatthecablefromthe
transmittertotheantennaisofgoodqualitytoavoidmismatchandunnecessarylosses.
Acablelossof1dBisthesameasreducingthepoweroutputofa50Wtransmittertolessthan40W.
Similarly,acablelossof2dBisthesameasreducingtheoutputpowertolessthan32W.

Inareaswerethunderstormsandlightningisaproblem,surgearrestorsshouldbemountedbetween
theantennaconnectorandtheantennacable.Thearrestorsshouldbeofgoodqualityandbe
capableofhandlingtheoutputpowerofthetransmitter.

TheantennaoutputofthetransmitterisanNͲtypeantennaconnectoronthebackofthe
transmitter.Thesecondconnector(BNCͲtype)istheoutputoftheantennaswitchandcanbeusedto
connecttheinputofareceiver.
4.5 ACandDCconnectors
Refertosection3.4.2,3.6.1and3.6.3forvoltagesandconnectors.
4.6 Remotesignals
Severalremotesignalsareavailableontherearinterfacesoftheradiounits.
Thesesignalscanbegroupedinto:Audiosignals,Keysignals,Datainterfacesignalsandothersignals.
Note,forallinterfacesignals,RJ45connectorsareused.Asfaraspracticallypossible,thepairsused
onastandardethernetconnectionareusedwhenasignalisinput/outputasapairtotheradio(e.g.
audiolines).Forinterconnectionsbetweenthetransmitterandreceiver,andforinterconnectiontoa
distributionpanelwithRJ45connectors,standardCat5E,ethernetcableshouldbeused.Thisisa
goodquality,screenedcable,with1to1connectionsbetweenthetwoconnectors.

Belowisanoverviewofthesignalsavailableandtheirprimaryuse.Referalsotochapter3.2and3.4
forandoverviewofthedifferentconnectors.
4.6.1 REMconnector(receiver)andRXconnector(transmitter)

CABLE TX - REM/RX RX - REM PIN NAME DESCRIPTION
Pin no Pin no
1 1 RS485_Z RS485 - serial communication
RS485_Y
RJ45 - Cat 5E, FTP
2 2 RS485 - serial communication

3 3 LINE_P RX Audio 600ohm balanced
4 pairs
4 4 TX BUSY TTL L=transmitting (RX pullup)

5 5 RX BUSY TTL L=receiving (TX pullup)
6 6 LINE_N RX Audio 600ohm balanced
7 7 ALARM Alarm (TTL) I/O TRX alarm
8 8 GND Ground

Table4.6Ͳ1,Transceiver,transmitter–receiverinterconnections
TheRXconnectoronthetransmitterunithasaspecialfunction,andisnormallyusedonlyina
“transceiver”configuration.
WhenconnectingthesignalsonthetransmitterRXconnectorwiththesignalsonthereceiversREM
connector,thefollowingfunctionalityisaddedtothetransmitterandreceiver:

Thereceiveraudioline(p.3andp.6)isinputtothetransmitter.
Thisenablesthepossibilitytomonitortheaudiofromthereceiverfromthetransmitter
headphoneconnector,allowingonlyoneplugtobeusedforacombined
headset/microphone.
Inaddition,itenablesthepossibilitytousea2wireinterfacetothetransmittersaudioinput
lineforthecombinedtransmitterandreceiveraudio.
Finally,itenablesthefunctionalitytomonitorboththetransmittedaudioandthereceived
audioonthemonitoroutput(TAͲAUX2)lineonthetransmitter.

ARXBusysignal(p.5)isinputtothetransmitterfromthereceiver.
ThissignalsignalsthetransmitterthattheRXisbusy.ThisisusedinVDLoperation.

ATXBusysignal(p.4)isoutputfromthetransmittertothereceiver.
ThissignalsignalsthereceiverthattheTXisbusy(transmitting).ThisisusedinVDL
operation,andtomutethereceiverwhiletransmitting(seetablebelow).

Areceiveralarmin/outisconnectedtothetransmitteralarmin/out.
Thisenablesthefunctionalitythatthecompletetransceiver(bothreceiverandtransmitter
unit)willenterintoalarmstateifoneoftheunitsfails.Thisisusefulifthecomplete
transceivershouldbeswitchedtoabackuptransceiver.

TheRS485seriallinesfrombothunitsareconnectedinparallel.
ThisisusefultohaveonlyoneconnectionpointfortheRS485onthetransceiverforremote
control.


Menu path: Parameter Range Default Details
Interface config Ź
RS485 Bitrate 1200 – 115200 1200 Set the bit rate to use on the RS485 port
RS485 Address 1 – 255 1 Set the address to use on the RS485. In a
remote system using the RS485
communication port, all units that are
interconnected need to have a unique
address in order to avoid collisions and
misinterpretation of data.
RS485 Protocol Legacy | Legacy The protocols are described in the data
standard manual.
Legacy uses a protocol where the 9. bit is
used for address recognition, this is the
protocol used on the previous radio models
(TA7450, RA7202) and is compatible with
the RACS II PC software and the RCU
remote control unit.
Standard is an eight bit protocol that uses
the multidrop capability of the RS485 bus.
For more information on protocols, refer to
the SW manual.
RX config Ź
Audio Mute on transmit False | True True Set this to true if the receiver should be
muted while transmitting. Requires that the
Tx busy signal on the transmitters RX
connector is routed to the TX busy input on
the receiver REM connector. (p.4)
Table4.6Ͳ2,SettingsassociatedwiththetransmitterͲreceiverinterconnection

4.6.2 Audioin/outandLineloopkeying

Figure4.6Ͳ1,Audiointerfacesonthetransmitterandreceiverunits

WithreferencetoFigure4.6Ͳ1,thefollowingaudioremotesignalsareavailableontherear
connectors:

Monitorout:Monitorsignal,usuallyconnectedtoarecordingunit.

TX config Ź
Audio Monitor output Headset | Monitor Set where the monitor output signal and the
Monitor output output received audio (if a receiver is connected) is
routed.
Can be set to the headset connector, the 600
ohm monitor line output or both.
The monitor signal is the demodulated signal
detected on the output of the transmitter.
Audio Monitor level -80 – 10 dB -50 dB Set the relative output level of the monitor
signal. 10dB = max output, -80dB=minimum
Table4.6Ͳ3,SettingsassociatedwithMONITOROUTPUT(TA–AUX1)

Lineinput,transmitter:Thisisthetransmitteraudiolineinput.Thissignalisusually
connectedtoaVCSsystemoraremotecontrolthatusesa600ohmlineinterface.

TX config Ź
Audio Input source Auto | Line | Mic Auto The input source determines where the audio
| modgen | VoIP is applied to the transmitter.
Auto: Uses line input for when a
key signal is detected on one of
the remote connectors and mic
input if the key signal is detected
on the front panel connector.
Line: Uses the 600 ohm line
interface as the audio source
Mic: Uses the microphone input as
the audio source
Modgen: Uses the internal
modgen as audio input source – se
also Modgen frequency
VoIP: Uses the IP interface as the
audio source (availability depends
on radio specifications).
Audio Line sensitivity -40 – 0 dBm -17 dBm Set the sensitivity of the 600 ohm line input.
1 dB steps This setting determines where the VOGAD
(automatic gain control) start to operate.
Thus if it is set to -17 dBm, levels above -17
dBm will be modulated with 85% (default
setting).
For levels below -17 dBm the modulation will
decrease linearly.
Audio Line termination OFF | 600 ohm 600 ohm Set the termination of the input line to either
OFF or 600 ohm. Normally this is set to 600
ohm, but can be set to OFF on one of the
radios, if two transmitters are connected in
parallel. This is to maintain the 600 ohm
impedance on the lines.
Audio Line mute level OFF or OFF Below this level, the line input will be muted.
-40 to -10dBm Used where noisy lines are connected to the
1 dB steps transmitter to avoid unnecessary noise on
the produced RF signal during periods of
silence (Automatic transmissions; VOLMET,
ATIS)
Keying Source Mic, line, txkey, Mic, txkey Determines what signal that will be used as
txgnd, inband the source for keying the transmitter.
Any combinations can be set
Mic: Local PTT input from a
microphone, where the PTT is
connected to pin 4 and 8(gnd) on
the Mic/headset connector.
Line: Keying from a phantom
signal on the line input. Pin 3 and 6
on the Rem/TR connector.
Txkey: The transmitter is keyed by
an external voltage on the
TXKEY_P and TXKEY_N input
pins. Signals located on Pin 7 and
8 on the | connector.
Txgnd: The transmitter is keyed by
a signal on the TXKEY_G input pin
Signals are located on Pin 4 and 8
(gnd) on the REM/TR connector.
Inband: The transmitter is keyed
using an inband tone (see also
inband frequency and inband
sensitivity)

TX config Ź
Keying Loop key bias +12V, Gnd, Floating Connects the center pin of the line input
floating transformer to:
Floating: The center pin is not
connected. If loop keying is used,
an external voltage must be
applied to pin 3 (REM connector)
in order to key the transmitter
Gnd: The center pin is grounded. If
loop keying is used, an external
voltage must be applied to pin 3
(REM connector) in order to key
the transmitter.
+12V: A 12V DC is supplied on pin
3(REM/TR connector). The
transmitter can be keyed with a
relay (or equivalent) that create a
DC path on the line input pin, pin 3
and 6 (REM/TR connector).
Table4.6Ͳ4,SettingsassociatedwithLINE_INPUT(TXͲREM)

Lineoutput,receiver:Thisisthereceiveraudiolineoutput.Thissignalisusuallyconnected
totheVCSsystemoraremotecontrolthatusesa600ohmlineinterface.

RX config Ź
Audio Output source Speaker | Speaker, The output source determines where the
Headphone | Headphone, received audio is output.
Lineout | Lineout Line: Output audio on the 600
VoIP ohm line interface
Speaker: Output audio on the
integrated speaker.
Headphone: Output audio to a
headphone connected to the front
panel connector.
VoIP: Output audio on the IP
interface (availability depends on
radio specifications).
Audio Line output level -40 to +10 dBm -10 dBm Set the maximum output level on the 600
1 dB steps ohm line output.
Table4.6Ͳ5,SettingsassociatedwithLINE_OUTPUT(RXͲREM)

4.6.3 Otherkeysignals

Figure4.6Ͳ2,Keysignalsonthetransmitterunit

Inadditiontothelineloopkeying,itispossibletokeythetransmitter,usingvariousotherhardware
andsoftwareoptions.
TX_KEY_G
ThisisasignalavailableonthetransmitterREMconnector,pin4.Thissignal,ifconnectedto
GNDwillkeythetransmitter.

TXKEY_P,TXKEY_N
Thisisadifferentialsignal,availableonthetransmitterAUX2connector,pin7and8.This
signalwillkeythetransmitterifavoltagebetween12and48Visfedbetweenthem.Note
alsothatthisisadifferentialsignal,notconnectedtoanygroundpotentialinsidethe
transmitter,thereforethesignalcanbeconfiguredforbothpositiveandnegativevoltage
keying(seefigure).

TX config Ź
a signal on the TX_KEY_G input
pin Signals are located on Pin 4
and 8 (gnd) on the REM/TR
connector.
sensitivity)
Table4.6Ͳ6,KeySourcesettings

4.6.4 SquelchandAGCsignals,receiverunit

Figure4.6Ͳ3,SquelchandAGCsignalsreceiverunit
RX_BUSY(REM,p.5)
SquelchoutputsignalthatisreferencedtoGND.
Thissignalcanbeusedtodetectthatthereceiverisbusyonaconnectedtransmitterunit,on
aremotecontroloranotherunitthatcanusethissignal.
Thesignalpolaritycanbeconfigured.

SQUELCH(AUX2,p.1andp.2)
Thissignalindicatesthatthesquelchisactivated/closed.
Thepolaritycanbeconfigured.Theoutputisasolidstaterelay,ratedformaximum100V/
100mA.

AGC_HILO_P,AGC_HILO_N(AUX2,p.3andp.6)
Thissignalindicatesthatasignalaboveapproximately+40dBuVisreceived.
Thiscanbeusedtodetectifthesignalcomesfromacollocatedtransmitteroperatingonthe
samefrequencyoratransmissionfromanaircraft.
AGCVOLTAGE(AUX2,p.7)
Thisisananalogueoutput0Ͳ5V.Theoutputvoltageis0VforaninputofxxxuVandincreases
linearlywiththeinputsignaluptoxxxuVwherethevoltagereach+5V.

RX config Ź
Squelch SqOut output Closed | Open | Closed on Set the behavior of the SqOut output (AUX2,
Closed on busy| busy p.1 and p.2).
Open on busy
Squelch RxBusy output Closed | Open | Closed on Set the behavior of the RxBusy output
Closed on busy| busy (REM, p.5).
Open on busy
Table4.6Ͳ7,Squelchoutputconfiguration

4.6.5 AlarmandSelectsignalstransmitterandreceiver

Figure4.6Ͳ4,Alarmandselectsignals,transmitter
Thealarmsignalsareoutputsusedtosignalthattheradiounitshasdetectedanalarminternally.The
Selectsignalisusedtoselectordeselect(inhibit)aparticularunit.Bydeselectingaunit,theunitwill
enterintostandbyandcannotbeusedforradiocommunication.However,allotherfunctionalityof
theradiounitsisoperationalwhentheradioisinthestandbystate.
Thepinoutandsignalsareequalonthetransmitterandthereceiverunit,excepttheALARM(REM,
p.7)pin.Thispinhasafixed+5VpullͲuponthereceiver,whilethepullͲupisconfigurableonthe
transmitter.

ALARM_P,ALARM_N(AUX1,p.1.andp.2.)
Thisisadifferentialsignal,usedtosignalthealarmstate.Theradiocanbesetupwithan
internalpullͲupto+12Vifdesired.

ALARM(REM,p.7)
Sameasthesignalabove,butthissignalisreferencedtoGND.

SELECT(AUX1,p.3andp.6)
Thisisadifferentialinput,connectedtoanoptocoupler.TheSelectsignalrequiresan
externalvoltagetooperate.
OnewaytousetheSELECTsignalisinconjunctionwiththeALARMoutputfromanother
radiounit.IftheALARMsignal(ALARM_PandALARM_N)onaprimary(main)radiois

connectedtotheSELECT_PandSELECT_Nonasecondary(backup)radio.Automatic
switchoverfromthemaintothestandbyradioisperformedifthemainradiodetectsan
alarm.Inthismode,apullͲupisrequiredontheALARMoutputfromtheprimaryradio.

Interface
config Ź
Alarm config Alarm pin pull-up Disabled | Enabled The ALARM_OUT_P and ALARM_OUT_N
Enabled output pins on AUX1 is used to signal that
the radio has an alarm. This parameter
applies a pull up voltage to ALARM_OUT_P
when there are no alarms present. When an
alarm is detected the relay contact close.
Alarm config Select polarity High | Low Low The SELECT_IN_P and SELECT_IN_N
input pins on AUX1 can be used to select /
deselect (Standby) the radio with an
external signal (e.g. alarm from a main
radio). This setting determines if the radio
should be operational on a low select input
signal or a high select input signal.
Table4.6Ͳ8,AlarmandSelectsettings,transmitterandreceiver


4.6.6 Miscellaneoussignals,transmitter

Figure4.6Ͳ5,Miscsignals,transmitter
RXBUSY(SQ)(REM.p.5)
Thissignalisonlyavailablewhenareceiverisconnectedwitha8pinbusbetweenthe
transmitterRXandthereceiverREMconnector.
ThesignalisthesameastheRXBUSYfromthereceiver,settingsaredoneonthereceiver
unit.

KEY_OUT_P,KEY_OUT_N(AUX2,p.1andp.2)
Thisoutputcanbeusedforexternalequipmentthatneedsakeysignalfromthetransmitter.
Thekeysignalisavailableimmediatelyafterakeyinputisreceivedonanyofthekeyinputs.
NormallyRFisproducedonlyafewms(<10ms)afterakeysignalisappliedtothe
transmitter.
IftheKEY_OUTisusedforexternalequipmentthatusedrelaysforswitchingtheRF,itis
necessarytodelaytheRFoutput,thiscanbedonewithasoftwaresetting,seebelow.

TXLOW_P,TXLOW_N(AUX2,p.4andp.5)
Thisinputisusedtoimmediatelyswitchthetransmitterintolowpower.Theinputrequires
anexternalpullͲuptowork.Thelowpowerlevelcanbeadjustedwithasoftwaresetting.

Radio control
Ź
Low power level 30 – 41 dBm 41 dBm Set the low power level of the transmitter in 1
1 dB steps dB step. The low power level is the output
power of the transmitter when the transmitter
is set to low power, either by a command or
by an external input signal.
30 dBm corresponds to 1W output, 41 dBm
is 12W ouput.

TX config Ź
Keying RF delay 0 – 200 ms 0 (OFF) This setting is useful when the transmitter is
used together with external equipment such
as T/R relays, power amplifier or other
equipment that includes RF switchover
relays.
Since the RF switching in the transmitter is
done electronically, the RF is produced in
less than 10ms after the PTT signal is
detected. It could be harmful for the external
relays if the RF is applied to them before
switchover has occurred.
In order to delay the RF carrier this
parameter should be used under such
circumstances. A reasonable setting should
be in the order of 40-50 ms.

Table4.6Ͳ9,Misc.settings,transmitter.


4.7 Applications
4.7.1 Transceiver,localconfiguration

Inatransceiversetupforlocalconfiguration,themicandheadsetsignalsareinterfacedtothe
microphone/headsetconnectoronthetransmitter.Theheadphonesignalcanalsobederivedfrom
theheadsetconnectoronthetransmitter.

ConnectionforlocaloperationisshowninFigure4.7Ͳ1andtab.

Figure4.7Ͳ1,Transceiver,Localconfiguration,interfacing

Step Description Reference
1 Connect an 8 wire Cat5e cable between TA-RX connector and RA- 4.6.1 - Pin description
REM connector.
2 Set the Mute on transmit to enabled (receiver) 5.9.2 - RX config group

3 Set Audio output source to Lineout (receiver) 5.9.2 - RX config group
4 Set Audio input source to mic (transmitter) 5.5.2 – TX config group
5 Set Monitor output to headset (transmitter) 5.5.2 – TX config group
6 Set Keying source to include mic (transmitter) 5.5.2 – TX config group
7 Connect a coax cable (RG58 or better) between the TA – Receiver 3.2.2 and 3.4.1
antenna connector (BNC) and the antenna input on the receiver.
Alternatively, use separate antennas for the TA and RA.
Other useful signals in Local configuration:
AUX1 Alarm out, Select in, RS232, +12V 3.2.5 (transmitter AUX1) and
3.4.4 (receiver AUX1)
TA- Key out relay, Monitor output, TX_LOW (Gas alarm) input, TXKEY 3.2.6 (transmitter AUX2)
AUX2
RA- Squelch out relay, AGC HILO output, AGC voltage output 3.4.6 (receiver AUX2)
AUX2
TA – RS485, Line input, Key, Squelch, Alarm 3.2.7 (transmitter REM)

REM
Table4.7Ͳ1,Transceiver,Localconfiguration

4.7.2 Transceiver,remoteconfiguration

Inatransceiversetupforremoteconfiguration,theaudioisfedintothetransmitterandthe
receivedaudioisoutputfromthereceiveronthe600ohmlines.
Thelinecaneitherbea2Waudiolineconnectedtothetransmitteronly,ora4Winterfacederived
fromthetransmitterandthereceiverunits.

Figure4.7Ͳ2,Transceiver,Remoteconfigurationwith2wireaudiointerface

REM connector.
2 Set Mute on transmit to enabled (receiver) – if desired 5.9.2 - RX config group

4 Set Audio input source to line (transmitter) 5.5.2 – TX config group
5 Set Keying source to include txkeygnd 5.5.2 – TX config group
Other useful signals in Remote configuration:

AUX2
AUX2

REM
Table4.7Ͳ2,Transceiver,Remote(2W)interface

Figure4.7Ͳ3,Transceiver,Remoteconfigurationwith4wireaudiointerface

1 For audio line interfaces refer to the reference 4.6.2 – Audio interface
4 Set Audio input source to line (transmitter) 5.5.2 – TX config group
5 Set Keying source to include txkeygnd ( or other signal if 5.5.2 – TX config group
desired)
Other useful signals in Remote configuration:

AUX2
AUX2

REM
Table4.7Ͳ3,Transceiver,Remote(4W)interface

4.7.3 Transmitter,main/backupconfiguration

Byconnectingthealarmoutputfromone(main)transmittertotheselectinputonabackupunit,itis
possibletoperformautomaticswitchingbetweenthem.Inthisway,ifamaintransmitterdetectsan
internalfailure,itcanbesetuptoenterintostandbymodeandstoptransmissions.Thealarmsignal
willalsosignaltoabackupunittotakeoverthetransmitfunction.

Figure4.7Ͳ4,Main/Backuptransmitter

1 Connect the alarm_out signal (p.1,2) from AUX1 on the main 3.2.5 – AUX1 connector
transmitter to the select_in signal (p.3.6) on AUX1 on the standby
transmitter. The connection can be done via a distribution panel or
by making a special with RJ45 connectors in each end. The cables
used should be of the same quality as a CAT5E network cable and
the screen should be connected in the plugs.
2 Set Alarm config, Alarm pin pullup to Enabled (default) 5.5.3 – Interface config group
3 Set Alarm config, Select polarity to Low (default) 5.5.3 – Interface config group
4 Set the main transmitter Operation mode to Main 5.5.1 – Radio control group
5 Set the backup transmitter Operation mode to Norm (default) 5.5.1 – Radio control group
6 Connect separate antennas to the two transmitters.
Alternatively use an external antenna change over unit (ACU) in

order to switch the antenna between the main and standby
transmitters. The antenna change over unit can be controlled by
the alarm signal on the main unit
Table4.7Ͳ4,Main/backupconfiguration,transmitters

4.7.4 Receiver,main/backupconfiguration

Byconnectingthealarmoutputfromone(main)receivertotheselectinputonabackupunit,itis
possibletoperformautomaticswitchingbetweenthem.Inthisway,ifamaintransmitterdetectsan
internalfailure,itcanbesetuptoenterintostandbymodeandstopreceptionofsignals.Thealarm
signalwillalsosignaltoabackupunittotakeoverthereceivefunction.

Figure4.7Ͳ5,Main/Backupreceiver

1 Connect the alarm_out signal (p.1,2) from AUX1 on the main 3.4.4 – AUX1 connector
receiver to the select_in signal (p.3.6) on AUX1 on the standby
receiver. The connection can be done via a distribution panel or by
making a special with RJ45 connectors in each end. The cables
used should be of the same quality as a CAT5E network cable and
the screen should be connected in the plugs.
2 Set Alarm config, Alarm pin pullup to Enabled (default) 5.8.3 – Interface config group
3 Set Alarm config, Select polarity to Low (default) 5.8.3 – Interface config group
4 Set the main receiver Operation mode to Main 5.8.1 – Radio control group
5 Set the backup receiver Operation mode to Norm (default) 5.8.1 – Radio control group
6 Connect separate antennas to the two receivers.
Alternatively use an external antenna change over unit (ACU) in

order to switch the antenna between the main and backup
receivers. The antenna change over unit can be controlled by the
alarm signal on the main unit.
The antenna connection can also be done via a pair of

main/backup transmitters.
Table4.7Ͳ5,Main/backupconfiguration,receivers

4.7.5 AMdataoperation(ACARS)

TheconfigurationtousethetransceiverinanACARSdatalinkisthesameaswhenusingtheradiofor
voiceoperation.JustchangethemodulationtoAMͲMSK(RXconfiggroupandTXconfiggroup),the
radiowillautomaticallyselectdifferentaudiofiltersandAGCtimestomatchtherequirementforthis
mode.
4.7.6 VDLmode2dataoperation(aspartofaVHFGroundStation)

TheTA7650/RA7203transceiverpairimplementsthelowerlayeroftheVDLmode2protocol.
Specificallythisisthephysicallayerandthemediaaccesslayer(MAC).AVHFmanagemententityis
requiredforfullVDLmode2dataoperation.

TooperatethetransceiverasaVDLmode2groundstation,thefollowingisrequired:
x AVHFmanagemententityabletocontrolthetransmissionandreceptionviaindependent
TCP/IPconnectionstothetransmitterandreceiverunits.
x TheVHFmanagemententity(VME)mustsupporttheproprietaryJotronTCP/IPprotocol
describedindocument:VDLmode2:TCP/IPProtocoldescription.Thisdocumentisavailable
fromJotronuponrequest.

Figure4.7Ͳ6,Transceiver,VDLmode2configuration

REM connector. This will enable the RX busy and TX busy
signalling between the transmitter and receiver unit.
2 Set transmitter and receiver to VDL mode 2 operation 5.5.2 – TX config group
(Only available when ordered with this option)
5.9.2 – RX config group
3 Configure VDL mode 2 parameters according via the TX config 5.5.2 – TX config group
and RX config menus. (See below)
5.9.2 – RX config group
3 Configure TCP/IP addresses and ports for VDL mode 2 operation, 5.5.3 – TX interface group
and additionally IP addresses and ports for control using SNMP via
UDP/IP (See below). 5.9.3 – RX interface group
Other useful signals when operation on VDL mode 2
AUX1 Alarm out, Select in, +12V 3.2.5 (transmitter AUX1) and
TA- Key out relay 3.2.6 (transmitter AUX2)
AUX2
AUX2
TA – Squelch, Alarm 3.2.7 (transmitter REM)

REM
Table4.7Ͳ6,Transceiver,VDLmode2operation

TX config Ź
VDL2 Input source RS232, RS485, TCP/IP Determines where data for VDL2
TCP/IP transmission is input
VDL2 Output power 30 – 44 dBm 44 dBm Set the output power for VDL2 operation.
30 dBm = 1W power output
VDL2 Inter access 0.5 – 125.0 ms 4.5 ms Set the inter access delay parameter (TM1)
0.5 ms steps for VDL 2 operation.
VDL2 Channel busy 6 – 120 s 60 s Set the channel busy parameter (TM2) for
VDL2 operation.
VDL2 Persistence 1/256 – 256 13/256 Set the persistence parameter (P) for VDL2
operation
VDL2 Max attempts 1 – 65536 10 Set the max attempts parameter (M1) for
VDL2 operation
VDL2 Format BER test AVLC Defines the format of the VDL2 input
AVLC message using the TCP/IP connection.
BERtest: The transmitter omits
FEC and bit stuffing. Messages are
sent as “raw” data. Used to test
conformance to EN301481-1 tests.
AVLC: Messages are input to the
transmitter as single or multi AVLC
frames (up to 7 in each message)
Table4.7Ͳ7,VDLmode2settingsinTXconfigmenu

Interface
config Ź
LAN Address 4 octets IP 192.168.2.1 IP interface address for the unit. Must be
address unique on the network it connects to.
LAN Netmask 4 octets IP 255.255.0.0 The netmask used on the IP interface.
netmask Should correspond to the local network that
the radio is connected to.
LAN Default gateway 4 octets IP 0.0.0.0 If set different from the default, the radio unit
address will send IP traffic to the default gateway if
the address is unreachable on the local
network
LAN SNMP port 1 – 65535 161 The input port used for SNMP commands
The default port is the global port for SNMP
commands
LAN SNMP trap IP 4 octets IP 0.0.0.0 The IP address where SNMP traps are sent.
address The address can be in the form of a unicast,
multicast or broadcast address.
LAN SNMP trap port 1 – 65535 162 The output port where SNMP traps are sent.
The default value is the global port for
SNMP traps
LAN SNMP trap int 0 – 60 5 The interval on which an “alive” trap
(operstate) are sent to the host, if the TrapIP
and TrapPort are set. The value is given in
seconds. 0=OFF
LAN VDL input IP 4 octets IP 0.0.0.0 This parameter can be used to limit VDL
address input packets to the specified IP address.
When set to 0.0.0.0 the transmitter will
transmit VDL packages with any origin.
LAN VDL input port 1 – 65535 3005 The input port used for VDL traffic if the VDL
input source is set to
LAN VDL output port 1 – 65535 3006 The output port used for VDL traffic if the
VDL input source is set to tcpip
Table4.7Ͳ8,VDLmode2settingsinTXinterfacemenu

RX config Ź
VDL2 Station ID 0 - 16777215 0 If the station ID is set different from the
default value (0) the radio will filter all
incoming messages, and only output those
messages that are addressed for the
specific ground station ID.
(And broadcast messages)
VDL2 Provider Code 0 - 16777215 16777215 Used to set a provider code that is used to
filter out messages to “all ground stations of
a particular provider”. Set to default (0xffffff)
to enable “all providers”.
VDL2 Format BER test AVLC Defines the format of the VDL2 output
AVLC single single message using the TCP/IP connection.
AVLC multi BERtest: The receiver omits FEC
and bit destuffing. Messages are
output as “raw” data. Used to test
conformance to EN301481-1
tests.
AVLC single: Messages are
output as single AVLC frames
AVLC multi: Messages are output
as multi AVLC frames (up to 7 in
each message)
VDL2 CO Trap Interval 0 – 60 0 The interval on which a “CO” trap (Channel
occupancy) are sent to the host.
The CO is calculated for the time period set,
ie. If set to 15 the CO will reflect the channel
occupancy
VDL2 Mute on transmit On/Off On Determinates if the receiver is muted (no
output) during transmissions from own TX. If
set to Off, own generated messages will be
detected and output on the TCP/IP
connection. The filters above (Station ID and
Provider Code) will not have any effect on
own messages.
Table4.7Ͳ9,VDLmode2settingsinRXconfigmenu

Interface
config Ź
network
commands
SNMP traps
seconds. 0=OFF

Interface
config Ź
LAN VDL output IP 4 octets IP 0.0.0.0 The IP address that VDL packets received
address will be sent to. Must be set in order to detect
VDLpackets.
VDL input source is set to IP
Table4.7Ͳ10,VDLmode2settingsinRXinterfacemenu


5 OperatingInstructions
5.1 Introduction
Tosetupthetransmitterandreceiverunits,variousparameterscanbeselectedfromthe
frontpanel.Thissectiondetailshowthisisdoneandtherangeofallparameters.
Sincetheradiounitscontainsnomanualtuningpointsorswitches,allparameterscanin
principalbesetfromthefrontpanel,howeverexceptinsomerareoccasions,most
parametersshouldbeleftattheirdefault(factorypreset)values.
Thereare4userlevelsthatcanbeselectedtolimittheuseraccesstocertainparameters.
Theuserlevelscanbesetononeofthedatainterfaceports.Thereisalsoawaytooverride
theuserlevels,describedinthetechnicalmanual.
Theseuserlevelsare:
x Restricted Limitsfrontpaneloperationtoselectingpresetchannelsandadjusting
audiooutputlevelsanddisplayappearance.Usethislevelwhenthe
radiounitsareused fromaremotepositionorincaseswherethe
usershouldberestrictedtousepresetchannelsonly(1–100).
x Operation Sameasrestricted,butinadditionthelocaluserhasfullaccessto
changingandstoringfrequencies,andtochangethesquelchlevel.
x Technician Thislevelgivesthelocaluseraccesstothemostusedinstallation
specificparameters(linelevels,outputpower,etc.)andshouldbe
usedwheninstallingormaintainingtheradiounits.
x SysOp Thislevelgivesunlimitedaccesstoallparameterswithintheradio
unitsandshouldbeusedwithcare.

Inthefollowingsection,thesesymbolsandabbreviationsareusedtoexplainnavigationin
menus/settingofvalues:
x Scroll/Selectswitch =
x NavigationbuttonA(leftbutton) =
x NavigationbuttonB(middlebutton)=
x NavigationbuttonC(rightbutton) =
x Clockwise = CW
x CounterClockwise = CCW
JotronAS|TR7750:OperatorshandbookÎOperatingInstructions Page5Ͳ1

Noteonfrequencysetting.

ThefrequencyissetaccordingtotheproceduredescribedinICAOannex10.Thisisawayof
settingthefrequencyinamixed8.33and25kHzenvironment.Thefrequencysetdoesnot
alwaysreflecttheactualtransmitorreceivefrequencybutisthefrequencyusedtoorally
communicatethefrequencybetweencontrollersandpilots.
Thefrequencyandbandwidthusedareinaccordancewiththetablebelow:

Display Actual Bandwidth
frequency [kHz]
[MHz]
118.000 118.000 25
118.005 118.0000 8.33
118.010 118.0083 8.33
118.015 118.0167 8.33
118.025 118.025 25
118.030 118.0250 8.33
118.035 118.0333 8.33
118.040 118.04167 8.33
118.050 118.050 25
118.055 118.0500 8.33
118.060 118.0583 8.33
118.065 118.0667 8.33
118.075 118.075 25
118.080 118.0750 8.33
118.085 118.0833 8.33
118.090 118.09167 8.33
118.100 118.100 25
………. ……… ……..
136.975 136.975 25
136.980 136.9750 8.33
136.985 136.9833 8.33
136.990 136.99167 8.33
Table5.1Ͳ1,Frequencysetting8.33and25kHzchannels


5.2 Usermenu–transmitter(Restrictedaccesslevel)
Maindisplaywindowinrestrictedmode.

Display Description
Whenthetransmitterisswitchedon,itwillshowthefrequencyandthe
operationmode(AM).

Press tonavigatetothechannelrecallscreen.
Selectanychannel(upto100)thatispreviouslystoredintheradioby
rotating .Recallselectedchannelwith
Ifnochannelisstored,thedisplaywillshow:CH: No channels
Press tonavigatetotheaudiooutputlevelscreen.
Thissettingadjuststheaudioleveloutputatthefrontpanel
microphone/headsetconnector.
Rotate CWorCCWtoadjusttheheadsetlevel.
Press tonavigatetothedisplayintensityadjustscreen.
ThissettingadjuststheintensityofthedisplayandLEDindicators.
Rotate CWorCCWtoadjusttheintensity.

Press toreturntothedefaultscreen
Pressing fromthemaindisplaywillbringupthemenuoptionsavailable
forthecurrentuserlevel.

Menusforuserlevel:Restricted
Fordetailsregardingsubmenus,refertochapter5.4.

Table5.2Ͳ1,UsermenuselectionstransmitterͲrestricedaccesslevel

5.3 Usermenu–transmitter(Defaultaccesslevel)
Maindisplaywindowforuserlevels:Operator,TechnicianandSysOp.
Display Description
Whenthetransmitterisswitchedon,itwillshowthefrequencyandthe
operationmode(AM).

Press tonavigatetotheaudiooutputlevelscreen.
Thissettingadjuststheaudioleveloutputatthefrontpanel
microphone/headsetconnector.
Rotate CWorCCWtoadjusttheheadsetlevel.
Press tonavigatetothesetfrequencyscreen.
Use and toadjustthefrequencystep.
Rotate CWorCCWtoselectanewfrequency.
Confirmnewfrequencywith or .
Press tonavigatetothechannelstorescreen.
Selectchannelnumberbyrotating CWorCCW.
Confirmwith or .
Ifthechannelisalreadyprogrammed,thechannelmaybeclearedusing


Menusforuserlevel:Operator

Menusforuserlevel:Technician

Menusforuserlevel:SysOp


Table5.3Ͳ1,UsermenuselectionstransmitterͲOperator,TechnicianandSysOpaccesslevels
5.4 Setting,informationandconfigurationmenus–transmitter
Underthemenuselectionfromtheusermenu,varioussubmenugroupsareavailabledependingon
theuserlevel.
Thesubmenusanddetailsforthemareshowninthetablesbelow.
Submenu Accesslevel Description
SysOp,Technician Accesstooperationmode,lowpowerlevel,climaxoffset
Radio control ź
parameters,modulationandstandbysettings.
SysOp Accesstoconfigurationparametersformodulation,audio
TX config ź settings,key(PTT)settingsandinternalcalibration
settings.
SysOp Accesstoconfigurationparametersfortheethernetinterface,
RS232port,RS485port,variouspinsettingsonthehardware
Interface config ź
interface(remoteconnectors)andtheuseraccesslevel.
SysOp,Technician Displaysinformationaboutactivealarmsandgivesthe
Bite system ź
useraccesstointernalmeasurements.
All Displaysinformationaboutthefirmwareandhardware
System info ź
release,systemupͲtimeandradioidentification
Table5.4Ͳ1,Submenusavailableonthetransmitter

5.4.1 Radiocontrolgroup
SysOpandTechnicianaccesslevels.Refertosection5.5.1fordetails.
MENU
Radio Control
Operation mode Low power level AM Climax Modulation Alarm Standby

Set the radio to act Set the low power Offset* Choose between Force the radio Force the radio
as a "Main" or a level of the Set the AM offset available into alarm state. into standby state
"Norm" radio transmitter frequency modulation types
for Climax (AM, VDL, etc)
operation

Figure5.4Ͳ1,Radiocontrolgroup,transmitter
5.4.2 TXconfiggroup
SysOpaccesslevel.Refertosection5.5.2fordetails.
MENU
TX config
AM Audio Keying Calibrate VDL mode 2*

Set parameters for Set parameters for Set parameters for Calibrate the Set parameters for
AM operation. Audio in/out key input. Inband reference oscillator VDL mode 2
Power output and Sensitivity, Audio keying, Key operation. Power
modulation % source, Tone. source, levels, output, data
generator, etc. timeout setting, etc source, etc.

Figure5.4Ͳ2,TXconfiggroup,transmitter

5.4.3 Interfaceconfiggroup
MENU
Interface config
Access control Alarm config RS485 RS232 Rack

Set the user Set pullup for the Set parameters for Set parameters for Set parameters to
access level for external alarm pin RS485 serial RS232 serial identify location of
local operation and polarity for communication. communication. the radio:
select signal Bitrate, protocol Bitrate and Rack number,
and address protocol Row and column
Language LAN
Change the Set parameters for
language for local ethernet (IP)
control. Availability communication. IP
varies with model address, ports to
use, Gateway, etc.

Figure5.4Ͳ3,Interfaceconfiggroup,transmitter

5.4.4 Bitesystemgroup
MENU
Bite system
Alarms Measurements
Display active Measure power
alarms. Identifies levels, voltages,
modules and currents, lock
parameter with detect, etc.
failure.

Figure5.4Ͳ4,Bitesystemgroup,transmitter

5.4.5 Systeminfogroup
Allaccesslevels.
MENU
System info
ID, FW and HW
release info.
Radio uptime.

Figure5.4Ͳ5,Systeminfogroup,transmitter


5.5 Parameterdetails–transmitter
Radio control
Ź
Operation mode Main | Norm Norm A main radio will enter into standby if an
alarm is detected by the internal BITE
system.
A norm radio will continue operation (if
possible) even if a failure is detected.
In a main / standby configuration, the main
radio is set to Main and the standby radio is
set to Norm. In this way the control can
automatically be transferred to the standby
radio by using the available alarm output and
select input on the radios.
Low power level 30 – 41 dBm 41 dBm Set the low power level of the transmitter in 1
1 dB steps dB step. The low power level is the output
power of the transmitter when the transmitter
is set to low power, either by a command or
by an external input signal.
30 dBm corresponds to 1W output, 41 dBm
is 12W ouput.
AM climax offset -8.0, -7.5, -7.3, 0 kHz Set the frequency that the output carrier will
-5.0, -4.0, -2.5, be offset with in offset carrier operation.
0 These offset frequencies are in accordance
+2.5, +4.0, +5.0, with ICAO annex 10.
+7.3, +7.5, +8.0 For 8.33 kHz operation, only -2.5 and +2.5
kHz are available.
Availability depends on radio specifications.
Modulation AM, (AMMSK), AM Select the modulation type / waveform to
(VDL2), (FM) use.
Alarm On | Off Off This setting force the radio into alarm state
(forced alarm) if set to On.
Used for simulations, or to force a radio to
signal an alarm in order to select a backup
(standby) radio.
Standby On | Off Off This setting force the radio into standby state
(forced standby) if set to On.
Used to manually set a radio to standby.
Table5.5Ͳ1,Radiocontrolgroup,transmitter

5.5.2 TXconfiggroup

TX config Ź
AM Output power 30 – 47 dBm 47 dBm Set the output power for AM operation.
1 dB steps Max. level depends on radio model and is:
47 dBm for TA7650
44 dBm for TA7625
40 dBm for TA7610
AM Modulation 10 – 95 % 85 % Set the modulation degree for AM operation.
1% steps

TX config Ź
Audio Input source Auto | Line | Mic Auto The input source determines where the audio
| modgen | VoIP is applied to the transmitter.
Auto: Uses line input for when a
key signal is detected on one of
the remote connectors and mic
input if the key signal is detected
on the front panel connector.
Line: Uses the 600 ohm line
interface as the audio source
Mic: Uses the microphone input as
the audio source
Modgen: Uses the internal
modgen as audio input source – se
also Modgen frequency
VoIP: Uses the IP interface as the
audio source (availability depends
on radio specifications).
Audio Mic sensitivity -40 – 0 dB -25 dB Set the gain (sensitivity) for the microphone
1 dB steps connected to the front panel connector.
Use this setting to increase or decrease the
gain if needed. Setting depends on
microphone used.
Audio Line sensitivity -40 – 0 dBm -17 dBm Set the sensitivity of the 600 ohm line input.
1 dB steps This setting determines where the VOGAD
(automatic gain control) start to operate.
Thus if it is set to -17 dBm, levels above -17
dBm will be modulated with 85% (default
setting).
For levels below -17 dBm the modulation will
decrease linearly.
Audio Line termination OFF | 600 ohm 600 ohm Set the termination of the input line to either
OFF or 600 ohm. Normally this is set to 600
ohm, but can be set to OFF on one of the
radios, if two transmitters are connected in
parallel. This is to maintain the 600 ohm
impedance on the lines.
Audio Line mute level OFF or OFF Below this level, the line input will be muted.
-40 to -10dBm Used where noisy lines are connected to the
1 dB steps transmitter to avoid unnecessary noise on
the produced RF signal during periods of
silence (Automatic transmissions; VOLMET,
ATIS)
Audio Monitor output Headset | Monitor Set where the monitor output signal and the
Monitor output output received audio (if a receiver is connected) is
routed.
Can be set to the headset connector, the 600
ohm monitor line output or both.
The monitor signal is the demodulated signal
detected on the output of the transmitter.
Audio Monitor level -80 – 10 dB -50 dB Set the relative output level of the monitor
signal.
Audio VOGAD Off, x-fast, fast, Norm Set the attack and decrease time of the
norm, slow, x- automatic gain control (VOGAD).
slow Off is used only for maintenance
purposes.
Audio Modgen frequency 100 – 5000 Hz 1003 Hz Set the frequency of the internal modulation
1 Hz step generator. Used in conjunction with the
Audio input source

TX config Ź
a signal on the TXKEY_G input pin
Signals are located on Pin 4 and 8
(gnd) on the REM/TR connector.
sensitivity)
Keying Inband frequency 100 – 5000 Hz 5000 Set the frequency to be used for the inband
10 Hz steps tone that will be used to key the transmitter.
By selected the tone frequency to use, the
transmitter will automatically calculate the
notch filter to use an insert this into the audio
path. Applicable to the line interface input
only.
Keying Inband sensitivity -40 to -10 dBm -30 The level of the tone used to key the
transmitter on the 600ohm input line.
The value is given in dBm (absolute level
related to 600 ohm). Values above the limit
will key the transmitter.
See also Keying source and Inband
frequency.
Keying Timeout OFF | 15-300 s OFF Set the timeout for the key signal. If the PTT
1s steps is pressed longer than this timeout, the
transmitter will automatically stop
transmitting. The transmitter will
automatically reset the timer when the key
signal is released.
Keying RF delay 0 – 200 ms 0 (OFF) This setting is useful when the transmitter is
used together with external equipment such
as T/R relays, power amplifier or other
equipment that includes RF switchover
relays.
Since the RF switching in the transmitter is
done electronically, the RF is produced in
less than 10ms after the PTT signal is
detected. It could be harmful for the external
relays if the RF is applied to them before
switchover has occurred.
In order to delay the RF carrier this
parameter should be used under such
circumstances. A reasonable setting should
be in the order of 40-50 ms.

TX config Ź
Keying Loop key bias +12V, Gnd, Floating Connects the center pin of the line input
floating transformer to:
Floating: The center pin is not
connected. If loop keying is used,
an external voltage must be
applied to pin 3 (REM/TR
connector) in order to key the
transmitter
Gnd: The center pin is grounded. If
loop keying is used, an external
voltage must be applied to pin 3
(REM/TR connector) in order to
key the transmitter.
+12V: A 12V DC is supplied on pin
3(REM/TR connector). The
transmitter can be keyed with a
relay (or equivalent) that create a
DC path on the line input pin, pin 3
and 6 (REM/TR connector).
Calibrate Ref oscillator -127 – 128 0 This setting is used to fine adjust (calibrate)
the reference oscillator of the transmitter.
The full range is approximately 10 ppm. This
setting should be used with care, and only
when a calibrated frequency measuring
instrument is connected to the transmitter.
VDL2 Input source RS232, RS485, TCP/IP Determines where data for VDL2
TCP/IP transmission is input
VDL2 Output power 30 – 47 dBm 47 dBm Set the output power for VDL2 operation.
VDL2 Inter access 0.5 – 125.0 ms 4.5 ms Set the inter access delay parameter (TM1)
0.5 ms steps for VDL 2 operation.
VDL2 Channel busy 6 – 120 s 60 s Set the channel busy parameter (TM2) for
VDL2 operation.
VDL2 Persistence 1/256 – 256 13/256 Set the persistence parameter (P) for VDL2
operation
VDL2 Max attempts 1 – 65536 10 Set the max attempts parameter (M1) for
VDL2 operation
VDL2 Format BER test AVLC Defines the format of the VDL2 input
AVLC message using the TCP/IP connection.
BERtest: The transmitter omits
FEC and bit stuffing. Messages are
sent as “raw” data. Used to test
conformance to EN301481-1 tests.
AVLC: Messages are input to the
transmitter as single or multi AVLC
frames (up to 7 in each message)
Table5.5Ͳ2,TXconfiggroup,transmitter


Interface
config Ź
Access control SysOp, SysOp Set the user access level for local control.
Technician, This setting limits the availability of some
Operator, menus, depending on the access level. In
Restricted order to set the access level from the user
interface, a special hardware key must be
inserted into the microphone/headset
connector. Details of the key available in the
technical manual.
Set language Depending on English Set the language to use on the user
model interface. Availability of different languages
depends on specifications when ordering
the transmitter.
Alarm config Alarm pin pullup Disabled | Enabled The ALARM_OUT_P and ALARM_OUT_N
applies a pullup voltage to ALARM_OUT_P
standard manual.
the SW manual.
RS232 Bitrate 1200 – 115200 115200 Set the bit rate to use on the RS232
interface ports
network
commands

Interface
config Ź
SNMP traps
seconds. 0=OFF
LAN VDL input IP 4 octets IP 0.0.0.0 This parameter can be used to limit VDL
address input packets to the specified IP address.
When set to 0.0.0.0 the transmitter will
transmit VDL packages with any origin.
LAN VDL input port 1 – 65535 3005 The input port used for VDL traffic if the VDL
input source is set to
VDL input source is set to tcpip
RACK Number 0 – 100 0 Used to identify the location of the radio
from a remote application. Defines the rack
where the radio is located.
RACK Row 0 – 20 0 Used to identify the location of the radio
from a remote application. Defines the row
number in the rack. The row number is
counted from the top to the bottom of the
rack.
RACK Column 0–6 0 Used to identify the location of the radio
from a remote application. Defines the
column in the rack. The column number is
counted from the left in steps of one receiver
width or 14TE. There are 84 TE in a 19”
rack.
I.e. in a 19” frame width 6 receivers, the
receivers will have the column set to
1,2,3,4,5 or 6.
In a 19” frame width 3 transmitters, the
transmitters will have the column set to 1,3
or 5.
Table5.5Ͳ3,Interfaceconfiggroup,transmitter

Interface
config Ź
TX alarm Depends on the This option displays all active alarms in the
alarm status of the unit.
radio unit See section 6.1 for more info.
Measurements Forward 30 – 47 dBm Displays the forward power in dBm detected
at the output of the transmitter
Measurements Reflected 0 – Forward Displays the reflected power in dBm
power detected on the output of the transmitter
Measurements VSWR 1: Displays the calculated VSWR from the
forward and reflected measurements
Measurements Modulation Up to 95% Displays the measured modulation level on
the output of the transmitter [%]
Measurements Current Max 10 A when Displays the total current consumption (28V)
keyed of the transmitter [A]
Measurements PA Temp Max 85°C Displays the temperature measured on the
PA module in the transmitter [°C]
Measurements LO level Min. 0 dBm Displays the level measured at the output of
the local oscillator in dBm
Measurements Line level Input line level Displays the input line level in dBm
Measurements 28 Volt 20.0 – 29.0 V Displays the regulated 28V supply from the
power regulator board.
The 28V is used on the PA board.
power regulator board
The 12V is used on the main board
Measurements 6 Volt 5.0 – 7.0 V Displays the regulated 6V on the modulator
board
The 5V is used on various modules
Measurements -5 Volt -6.2 - -4.0 V Displays the regulated -5V supply from the
The -5V is used on the main board.
Measurements 3.3 Volt 2.9 – 3.6 V Displays the regulated 3.3V supply from the
The 3.3V is used on various modules
Table5.5Ͳ4,Bitesystemgroup,transmitter

5.6 Usermenu–receiver(Restrictedaccesslevel)
Maindisplaywindowinrestrictedmode.

Display Description
Whenthereceiverisswitchedon,itwillshowthefrequencyandthe
operationmode(AM).

Press tonavigatetotheloudspeakeraudiooutputscreen.
Thissettingadjuststheaudioleveloutputintheintegratedloudspeaker.
Rotate CWorCCWtoadjusttheaudiolevel.

Press tonavigatetotheheadsetaudiooutputscreen.


Pressing fromthemaindisplaywillbringupthemenuoptionsthatare
availableforthecurrentuserlevel.
Press todisable/activethesquelch.

Menusforuserlevel:Restricted

Table5.6Ͳ1,UsermenuselectionsreceiverͲrestricedaccesslevel

5.7 Usermenu–receiver(Defaultaccesslevel)
Maindisplaywindowforuserlevels:Operator,TechnicianandSysOp.

Display Description
Whenthereceiverisswitchedon,itwillshowthefrequencyandthe
operationmode(AM).

Press tonavigatetotheloudspeakeraudiooutputscreen.

Press tonavigatetotheheadsetaudiooutputscreen.

Press tonavigatetothesetfrequencyscreen.
Use and toadjustthefrequencystep.
Rotate CWorCCWtoselectanewfrequency.
Confirmnewfrequencywith or .
Press tonavigatetothechannelstorescreen.
Selectchannelnumberbyrotating CWorCCW.
Confirmwith or .
Ifthechannelisalreadyprogrammed,thechannelmaybeclearedusing

Press todisable/activatethesquelch.

Menusforuserlevel:Operator

Menusforuserlevel:Technician

Menusforuserlevel:SysOp

Table5.7Ͳ1,UsermenuselectionsreceiverͲOperator,TechnicianandSysOpaccesslevels
5.8 Setting,informationandconfigurationmenus–receiver
Underthemenuselectionfromtheusermenu,varioussubmenugroupsareavailabledependingon
theuserlevel.
Thesubmenusanddetailsforthemareshowninthetablesbelow.

Submenu Accesslevel Description
SysOp,Technician Accesstooperationmode,lowpowerlevel,climaxoffset
Radio control ź
parameters,modulationandstandbysettings.
SysOp Accesstoconfigurationparametersformodulation,audio
RX config ź
settings,Squelchsettingsandinternalcalibrationsettings.
SysOp Access to configuration parameters for the ethernet
interface, RS232 port, RS485 port, various pin settings on
Interface config ź the hardware interface (remote connectors) and the user
access level.
SysOp,Technician Displaysinformationaboutactivealarmsandgivesthe
Bite system ź
useraccesstointernalmeasurements.
All Displaysinformationaboutthefirmwareandhardware
System info ź
release,systemupͲtimeandradioidentification
Table5.8Ͳ1,Submenusavailableonthereceiver


MENU
Radio Control
Operation mode Modulation Alarm Standby

Set the radio to act Choose between Force the radio Force the radio
as a "Main" or a available into alarm state. into standby state
"Norm" radio modulation types
(AM, VDL, etc)

Figure5.8Ͳ1,Radiocontrolgroup,receiver
5.8.2 RXconfiggroup
MENU
RX config
AM Audio Squelch Calibrate VDL mode 2*

Set parameters for Set parameters for Set parameters for Calibrate the Set parameters for
AM operation. Audio output, the squelch. reference oscillator VDL mode 2
Squelch levels. Levels, Audio Inband config and and the RSSI operation. Data
output , RF and AF polarity of sq out reading destination, etc.
AGC settings, etc pins.

Figure5.8Ͳ2,RXconfiggroup,receiver

MENU
Interface config
Access control Alarm config RS485 RS232 Rack

Set the user Set pullup for the Set parameters for Set parameters for Set parameters to
access level for external alarm pin RS485 serial RS232 serial identify location of
local operation and polarity for communication. communication. the radio:
select signal Bitrate, protocol Bitrate and Rack number, row
and address protocol and column
Language LAN
Change the Set parameters for
language for local ethernet (IP)
control. Availability communication. IP
varies with model address, ports to
use, Gateway, etc.

Figure5.8Ͳ3,Interfaceconfiggroup,receiver

MENU
Bite system
Alarms Measurements
Display active Measure power
alarms. Identifies levels, voltages,
modules and currents, lock
parameter with detect, etc.
failure.

Figure5.8Ͳ4,Bitesystemgroup,receiver

5.8.5 Systeminfogroup
Availableforallaccesslevels
MENU
System info
ID, FW and HW
release info.
System uptime.

Figure5.8Ͳ5,Systeminfogroup,receiver

5.9 Parameterdetails–receiver

Radio control
Ź
Squelch level -10 dBuV to +30 0 dBuV Squelch level
dBuV This squelch level is the level for the digital
noise compensated squelch.
Operation mode Main | Norm Norm A main radio will enter into standby if an
alarm is detected by the internal BITE
system.
A norm radio will continue operation (if
possible) even if a failure is detected.
In a main / standby configuration, the main
radio is set to Main and the standby radio is
set to Norm. In this way the control can
automatically be transferred to the standby
radio by using the available alarm output and
select input on the radios.
Modulation AM, (AMMSK), AM Select the modulation type / waveform to
(VDL2), (FM) use.
Alarm On | Off Off This setting force the radio into alarm state
(forced alarm) if set to On.
Used for simulations, or to force a radio to
signal an alarm in order to select a backup
(standby) radio.
Standby On | Off Off This setting force the radio into standby state
(forced standby) if set to On.
Used to manually set a radio to standby.
Table5.9Ͳ1,Radiocontrolgroup,receiver

5.9.2 RXconfiggroup

RX config Ź
Audio Output source Speaker | Speaker, The output source determines where the
Headphone | Headphone, received audio is output.
Lineout | Lineout Line: Output audio on the 600
VoIP ohm line interface
Speaker: Output audio on the
integrated speaker.
Headphone: Output audio to a
headphone connected to the front
panel connector.
VoIP: Output audio on the IP
interface (availability depends on
radio specifications).
Audio Line output level -40 – +10 dBm -10 dBm The max. output level on the 600 ohm line
1 dB steps output.
Audio RF AGC Off, x-fast, fast, Norm Set the attack and release times for the RF
norm, slow, x- AGC
slow Off is used only for maintenance
purposes.
Audio AF AGC On | Off Off Set the automatic AF gain control on or off.
Setting AF AGC on will lead to constant
audio output when received signals have
varying modulation levels
Audio Mute on transmit On | Off On Set this to On if the receiver should be
muted while transmitting. Requires that the
Tx busy signal on the RX connector on the
transmitter is routed to the TX busy input on
the receiver REM connector.
Squelch Override level -10 dBuV to +30 20 dBuV The override level where the analogue
dBuV squelch will open even if it is a “noisy”
signal. This squelch level overrides the
noise compensated squelch. Setting this
level to a lower level than the “SQ level” will
disable the noise compensated squelch
completely.
Squelch Inband config Off, open, Off Defines the behavior of the inband squelch
closed, both signal.
Off: No inband tone is generated
Open: An inband tone is
generated when the squelch is
open (receiving)
Closed: An inband tone is
generated when the squelch is
closed (muted)
Both: Different tones are
generated depending on the
status of the squelch.
Squelch Inband freq open 100 – 5000 Hz 5000 Set the frequency to be used for the inband
10 Hz steps tone that will be used to signal that the
squelch is open. Requires that open is
included in the Inband config setting. The
receiver will automatically notch the received
signal and insert a tone at the given
frequency.
Applicable to the line interface output only.
Squelch Inband freq closed 100 – 5000 Hz 5000 Set the frequency to be used for the inband
10 Hz steps tone that will be used to signal that the
squelch is closed. Requires that closed is
included in the Inband config setting. The
receiver will automatically insert a tone at
the given frequency.

RX config Ź
Squelch Inband level -30 to -10 -24 The level of the inband tone relative to the
setting in the line level output level.
Squelch SqOut output Set the behavior of the SqOut output (AUX2,
p.1 and p.2).
Squelch RxBusy output Closed | Open | Closed on Set the behavior of the RxBusy output
Closed on busy| busy (REM, p.5).
Open on busy
Calibrate Ref oscillator -127 – 128 0 This setting is used to fine adjust (calibrate)
the reference oscillator of the receiver. The
full range is approximately 10 ppm. This
setting should be used with care, and only
when a calibrated frequency measuring
instrument is used to measure the frequency
of the receiver.
The exact frequency of the receiver can be
determined either by connecting a spectrum
analyzer to the antenna connector of the
receiver and measure the leakage of the LO
output (45 MHz above the operating
frequency) – or by using a radio test set to
measure the bandwidth of the receiver and
adjust until center is on the operating
frequency.
Calibrate RSSI reading -10 to +10 dB 0 dB In order to measure the RSSI level exactly,
there is a provision to calibrate the reading.
Normally the reading is within +/-2 dB
without calibration, but it can be useful if to
signals are being compared.
VDL2 Output RS232, RS485, tcpip Determines to which port data received with
tcpip the VDL2 waveform is output
VDL2 Station ID 0 - 16777215 0 If the station ID is set different from the
default value (0) the radio will filter all
incoming messages, and only output those
messages that are addressed for the
specific ground station ID.
(And broadcast messages)
VDL2 Provider Code 0 - 16777215 16777215 Used to set a provider code that is used to
filter out messages to “all ground stations of
a particular provider”. Set to default (0xffffff)
to enable “all providers”.
VDL2 Format BER test AVLC Defines the format of the VDL2 output
AVLC single single message using the TCP/IP connection.
AVLC multi BERtest: The receiver omits FEC
and bit destuffing. Messages are
output as “raw” data. Used to test
conformance to EN301481-1
tests.
AVLC single: Messages are
output as single AVLC frames
AVLC multi: Messages are output
as multi AVLC frames (up to 7 in
each message)
VDL2 Mute on transmit On/Off On Determinates if the receiver is muted (no
output) during transmissions from own TX. If
set to Off, own generated messages will be
detected and output on the TCP/IP
connection. The filters above (Station ID and
Provider Code) will not have any effect on
own messages.
VDL2 CO Trap Interval 0 – 60 0 The interval on which a “CO” trap (Channel
occupancy) are sent to the host.
The CO is calculated for the time period set,
ie. If set to 15 the CO will reflect the channel
occupancy
Table5.9Ͳ2,RXconfiggroup,receiver


Interface
config Ź
Access control SysOp, SysOp Set the user access level for local control.
Technician, This setting limits the availability of some
Operator, menus, depending on the access level. In
Restricted order to set the access level from the user
interface, a special hardware key must be
inserted into the microphone/headset
connector. Details of the key available in the
technical manual.
Set language Depending on English Set the language to use on the user
model interface. Availability of different languages
depends on specifications when ordering
the receiver.
Alarm config Alarm pin pullup Disabled | Enabled The ALARM_OUT_P and ALARM_OUT_N
applies a pullup voltage to ALARM_OUT_P
standard manual.
the SW manual.
RS232 Bitrate 1200 – 115200 115200 Set the bit rate to use on the RS232
interface ports
network
commands

Interface
config Ź
SNMP traps
seconds. 0=OFF
LAN VDL output IP 4 octets IP 0.0.0.0 The IP address that VDL packets received
address will be sent to. Must be set in order to detect
VDLpackets.
VDL input source is set to IP
RACK Number 0 – 100 0 Used to identify the location of the radio
from a remote application. Defines the rack
where the radio is located.
RACK Row 0 – 20 0 Used to identify the location of the radio
from a remote application. Defines the row
number in the rack. The row number is
counted from the top to the bottom of the
rack.
RACK Column 0–6 0 Used to identify the location of the radio
from a remote application. Defines the
column in the rack. The column number is
counted from the left in steps of one receiver
width or 14TE. There are 84 TE in a 19”
rack.
I.e. in a 19” frame width 6 receivers, the
receivers will have the column set to
1,2,3,4,5 or 6.
In a 19” frame width 3 transmitters, the
transmitters will have the column set to 1,3
or 5.
Table5.9Ͳ3,Interfaceconfiggroup,receiver

Interface
config Ź
RX alarm Depends on the This option displays all active alarms in the
alarm status of the unit.
radio unit See section xxx for more info.
Measurements RSSI -10 - +110 dBuV Displays the received signal level (RSSI) in
dbuV
Measurements Line level -40 - +10 dBm Displays the level measured on the output of
the 600 ohm line interface
Measurements AGC volt 0–5V Displays the internal AGC voltage
Measurements Temperature Max 85°C Displays the internal temperature measured
on the main board [°C]
Measurements DC current 0.1 – 0.3 A Displays the total current consumption [28V]
of the receiver [A]
Measurements IF current 20 – 60 mA Displays the current consumption in the IF
(Intermediate Frequency) circuit [mA]
Measurements LNA current 20 – 60 mA Displays the current consumption in the LNA
(Low noise amplifier) [mA]
Measurements LO level Min. 15 dBm Displays the level measured at the output of
the local oscillator in dBm

Interface
config Ź
Measurements 12 Volt 11.0 – 12.8V Displays the regulated 12V supply from the
power supply board
The 12V is used on the main board
Measurements 6 Volt 5.0 – 7.0V Displays the regulated 6V on the
demodulator board
Measurements 5 Volt 4.5 – 5.5V Displays the regulated 5V supply from the
power supply board.
The 5V is used on various modules
Measurements 3.3 Volt 2.9 – 3.6V Displays the regulated 3.3V supply from the
power supply board.
The 3.3V is used on various modules
Measurements AC Present/Not Present / Not present. Signals that AC is
present or not present at the input of the unit.
Measurements VDL2-CO 0 – 100 Displays the channel occupancy (CO) when
in VDL 2 mode. The value is calculated
every second, or by the interval set in VDL2-
CO Trap interval.
Table5.9Ͳ4,Bitesystemgroup,receiver

6 ERRORCONDITIONSANDCORRECTIVEACTIONS

WhentheinternalBITE(BuiltInTestEquipment)inthetransmitterorthereceiverunitsdetectsa
failure,thealarmindicatoronthefrontpaneloftheunitwillbelit.Inadditiontheradiounitwill
signalwithanautomaticallygeneratedSNMPtrapmessageontheethernetinterface.
Detailsaboutthefaultthatcausedthealarmareaccessibleforuseraccesslevels:SysOpand
Technician.
Theerrormessagesareavailableintwolevels,firstthemodulethathasthefailurewillbeidentified,
nexttheuserhastheoptiontoviewindetailswhatparticularmessagethatcausedthealarm
condition.

Inthefollowing(LRU)referstotheLowestReplaceableUnit–andisnormallythefirstline
maintenancewherethecompleteunitisreplaced.(LRM)referstotheLowestReplaceableModule
andisthemodulewithintheunitthatcanbereplaced.TheLRMlevelnormallyrequiresawell
equippedworkshopwithappropriatetoolsfortestingandcalibration.
6.1 Transmittererrorconditions

Display Description
Pressfromthemaindisplaytobringuptheavailablemenus.

UsetonavigatetotheBitesystemmenuandselectbypressing

SelectTXalarm

Thedisplaysshowsmodule(s)wheretheBITEsystemhasdetectedfailures.
Toviewmoredetailsaboutthefailure,selectmodule.

Table6.1Ͳ1,Alarmindication,transmitternavigation

JotronAS|TR7750:OperatorshandbookÎERRORCONDITIONSAND Page6Ͳ1
CORRECTIVEACTIONS

TX alarm
PA Module
High SWR High Current High 28V

Caused by a SWR Current Temperature 12V
reading higher consumption is Temperature 5V
than 1:3 above 10A reading is above 3.3V
+85°C -5V
One of the voltage
readings is out of
range
Action: Action: Action: Action:

Check antenna / Replace - Replace - Replace -
Antenna TX unit (LRU) TX unit (LRU) TX unit (LRU)
connectors / PA module (LRM) PA module (LRM) PA module (LRM)
Antenna Cable
Probable cause: Probable cause: Probable cause:
Defective output Defective fan(s) Defective
transistor component on
power regulator
board

Figure6.1Ͳ1,TransmitterPAmodule,errorsandcorrectiveactions
CORRECTIVEACTIONS

TX alarm
Mod module
LO level LO lock detect 6V

The LO level is Synthesizer is out Failure on 6V
below 0dBm of lock regualtor on mod
module
Action: Action: Action:

Replace - Replace - Replace -
TX unit (LRU) TX unit (LRU) TX unit (LRU)
Modulator module Modulator module Modulator module
(LRM) (LRM) (LRM)
Probable cause: Probable cause: Probable cause:

Defective Defective Defective 6V
synthesizer circuits synthesizer circuits regulator
/ VCO / TCXO / VCO / TCXO modulator board

Figure6.1Ͳ2,TransmitterModulatormodule,errorsandcorrectiveactions

CORRECTIVEACTIONS

TX alarm
Main Module
Ethernet Codec DSP Front

SPI
Failure on the RemExp Failure on the DSP Failure on the
ethernet controller BiteADC chip on the main communication
on the main board board link to the front
Failure on one or panel
more ICs on the
main board

Replace- Replace - Replace - Replace -
TX unit (LRU) TX unit (LRU) TX unit (LRU) TX unit (LRU)
Main module Main module Main module Check connections
(LRM) (LRM) (LRM) to the front panel,
Probable cause: Probable cause: Probable cause: replace front panel
Failure on the Failure on the Failure on the DSP (LRM)
ethernet chip specified chip chip. Probable cause:
Failure on the front
panel or
connectors betw.
front panel and
main board

Figure6.1Ͳ3,TransmitterMainmodule,errorsandcorrectiveactions

CORRECTIVEACTIONS

6.2 Receivererrorconditions

Display Description
Pressfromthemaindisplaytobringuptheavailablemenus.

UsetonavigatetotheBitesystemmenuandselectbypressing

SelectAlarmsandpress

Thedisplaysshowsmodule(s)wheretheBITEsystemhasdetectedfailures.
Toviewmoredetailsaboutthefailure,selectmodule.

Table6.2Ͳ1,Alarmindication,receivernavigation

CORRECTIVEACTIONS

RX alarm
Power module
High High Current 12V

Temperature Current 5V
Temperature consumption is 3.3V
reading is above above 500 mA
+85°C One of the voltage
readings is out of
range
Action: Action: Action:

Replace - Replace - Replace -
RX unit (LRU) RX unit (LRU) RX unit (LRU)
Power module Power module, Power module,
(LRM). Main module or RF Main module or RF
Probable cause: module (LRM). module (LRM)
Failure on one or
more components Cause: Excessive Cause: Excessive
on the power current current
module. consumption in consumption or
one or more defective voltage
modules. regualtor.

Figure6.2Ͳ1,ReceiverPowermodule,errorsandcorrectiveactions
CORRECTIVEACTIONS

RX alarm
RF module
LO level LO lock detect LNA current IF current

The LO level is Synthesizer is out Unnormal current Unnormal current
below 0dBm of lock consumption in the consumption in the
LNA (Low Noise IF circuitry.
Amplifier)

Replace - Replace - Replace - Replace -
RX unit (LRU) RX unit (LRU) RX unit (LRU) RX unit (LRU)
RF module (LRM) RF module (LRM) RF module (LRM) RF module (LRM)
Probable cause: Probable cause: Probable cause: Probable cause:

Defective Defective LNA transistor Defective IF chip
synthesizer circuits synthesizer circuits broken because of on the RF board
/ VCO / TCXO / VCO / TCXO high RF input or
transient caused
by lightning.

Figure6.2Ͳ2,ReceiverRFmodule,errorsandcorrectiveactions
CORRECTIVEACTIONS

RX alarm
Main Module
Ethernet Codec DSP Front

SPI
Failure on the RemExp Failure on the DSP Failure on the
ethernet controller BiteADC chip on the main communication
on the main board board link to the front
Failure on one or panel
more ICs on the
main board

Replace- Replace - Replace - Replace -
RX unit (LRU) RX unit (LRU) RX unit (LRU) RX unit (LRU)
Main module Main module Main module Check connections
(LRM) (LRM) (LRM) to the front panel,
Probable cause: Probable cause: Probable cause: replace front panel
Failure on the Failure on the Failure on the DSP (LRM)
ethernet chip specified chip chip. Probable cause:
Failure on the front
panel or
connectors betw.
front panel and
main board

Figure6.2Ͳ3,ReceiverMainmodule,errorsandcorrectiveactions
CORRECTIVEACTIONS

CORRECTIVEACTIONS

7 LISTOFTABLESANDFIGURES

TABLE1.1Ͳ1,RADIOMODELS......................................................................................................................................1Ͳ1
TABLE3.1Ͳ1,MIC/HEADSETCONNECTOR,TRANSMITTER,PINOUT....................................................................................3Ͳ3
TABLE3.2Ͳ1,LANINTERFACECONNECTOR,PINOUT.......................................................................................................3Ͳ5
TABLE3.2Ͳ2,AUX1CONNECTOR,TRANSMITTER,PINOUT...............................................................................................3Ͳ5
TABLE3.2Ͳ3,AUX2CONNECTOR,TRANSMITTER,PINOUT...............................................................................................3Ͳ6
TABLE3.2Ͳ4,REMCONNECTOR,TRANSMITTER,PINOUT.................................................................................................3Ͳ6
TABLE3.2Ͳ5,RXCONNECTOR,TRANSMITTER,PINOUT....................................................................................................3Ͳ7
TABLE3.3Ͳ1,HEADSETCONNECTOR,RECEIVER,PINOUT..................................................................................................3Ͳ9
TABLE3.4Ͳ1,LANINTERFACECONNECTOR,PINOUT.....................................................................................................3Ͳ11
TABLE3.4Ͳ2,AUX1CONNECTOR,RECEIVER,PINOUT...................................................................................................3Ͳ11
TABLE3.4Ͳ3,AUX2CONNECTOR,RECEIVER,PINOUT...................................................................................................3Ͳ12
TABLE3.4Ͳ4,REMCONNECTOR,RECEIVER,PINOUT.....................................................................................................3Ͳ12
TABLE4.1Ͳ1,INSTALLATIONPROCEDURES.....................................................................................................................4Ͳ1
TABLE4.6Ͳ1,TRANSCEIVER,TRANSMITTER–RECEIVERINTERCONNECTIONS.........................................................................4Ͳ3
TABLE4.6Ͳ2,SETTINGSASSOCIATEDWITHTHETRANSMITTERͲRECEIVERINTERCONNECTION...................................................4Ͳ4
TABLE4.6Ͳ3,SETTINGSASSOCIATEDWITHMONITOROUTPUT(TA–AUX1)..................................................................4Ͳ5
TABLE4.6Ͳ4,SETTINGSASSOCIATEDWITHLINE_INPUT(TXͲREM).................................................................................4Ͳ8
TABLE4.6Ͳ5,SETTINGSASSOCIATEDWITHLINE_OUTPUT(RXͲREM).............................................................................4Ͳ8
TABLE4.6Ͳ6,KEYSOURCESETTINGS..........................................................................................................................4Ͳ10
TABLE4.6Ͳ7,SQUELCHOUTPUTCONFIGURATION.........................................................................................................4Ͳ12
TABLE4.6Ͳ8,ALARMANDSELECTSETTINGS,TRANSMITTERANDRECEIVER.........................................................................4Ͳ14
TABLE4.6Ͳ9,MISC.SETTINGS,TRANSMITTER...............................................................................................................4Ͳ16
TABLE4.7Ͳ1,TRANSCEIVER,LOCALCONFIGURATION.....................................................................................................4Ͳ18
TABLE4.7Ͳ2,TRANSCEIVER,REMOTE(2W)INTERFACE.................................................................................................4Ͳ20
TABLE4.7Ͳ3,TRANSCEIVER,REMOTE(4W)INTERFACE.................................................................................................4Ͳ21
TABLE4.7Ͳ4,MAIN/BACKUPCONFIGURATION,TRANSMITTERS........................................................................................4Ͳ22
TABLE4.7Ͳ5,MAIN/BACKUPCONFIGURATION,RECEIVERS..............................................................................................4Ͳ23
TABLE4.7Ͳ6,TRANSCEIVER,VDLMODE2OPERATION..................................................................................................4Ͳ25
TABLE4.7Ͳ7,VDLMODE2SETTINGSINTXCONFIGMENU.............................................................................................4Ͳ26
TABLE4.7Ͳ8,VDLMODE2SETTINGSINTXINTERFACEMENU.........................................................................................4Ͳ26
TABLE4.7Ͳ9,VDLMODE2SETTINGSINRXCONFIGMENU.............................................................................................4Ͳ27
TABLE4.7Ͳ10,VDLMODE2SETTINGSINRXINTERFACEMENU.......................................................................................4Ͳ28
TABLE5.1Ͳ1,FREQUENCYSETTING8.33AND25KHZCHANNELS.......................................................................................5Ͳ2
TABLE5.2Ͳ1,USERMENUSELECTIONSTRANSMITTERͲRESTRICEDACCESSLEVEL...................................................................5Ͳ3
TABLE5.3Ͳ1,USERMENUSELECTIONSTRANSMITTERͲOPERATOR,TECHNICIANANDSYSOPACCESSLEVELS...............................5Ͳ5
TABLE5.4Ͳ1,SUBMENUSAVAILABLEONTHETRANSMITTER..............................................................................................5Ͳ5
TABLE5.5Ͳ1,RADIOCONTROLGROUP,TRANSMITTER......................................................................................................5Ͳ9
TABLE5.5Ͳ2,TXCONFIGGROUP,TRANSMITTER...........................................................................................................5Ͳ12
TABLE5.5Ͳ3,INTERFACECONFIGGROUP,TRANSMITTER.................................................................................................5Ͳ14
TABLE5.5Ͳ4,BITESYSTEMGROUP,TRANSMITTER.........................................................................................................5Ͳ15
TABLE5.6Ͳ1,USERMENUSELECTIONSRECEIVERͲRESTRICEDACCESSLEVEL.......................................................................5Ͳ16
TABLE5.7Ͳ1,USERMENUSELECTIONSRECEIVERͲOPERATOR,TECHNICIANANDSYSOPACCESSLEVELS...................................5Ͳ18
TABLE5.8Ͳ1,SUBMENUSAVAILABLEONTHERECEIVER..................................................................................................5Ͳ18
TABLE5.9Ͳ1,RADIOCONTROLGROUP,RECEIVER..........................................................................................................5Ͳ22
TABLE5.9Ͳ2,RXCONFIGGROUP,RECEIVER.................................................................................................................5Ͳ24
TABLE5.9Ͳ3,INTERFACECONFIGGROUP,RECEIVER.......................................................................................................5Ͳ26
TABLE5.9Ͳ4,BITESYSTEMGROUP,RECEIVER...............................................................................................................5Ͳ27
TABLE6.1Ͳ1,ALARMINDICATION,TRANSMITTERNAVIGATION..........................................................................................6Ͳ1
TABLE6.2Ͳ1,ALARMINDICATION,RECEIVERNAVIGATION................................................................................................6Ͳ5

FIGURE3.1Ͳ1,FRONTVIEW,TRANSMITTERUNIT,TAͲ7650/25/10.................................................................................3Ͳ1
FIGURE3.2Ͳ1,REARVIEW,TRANSMITTERUNIT,TAͲ7650/25/10....................................................................................3Ͳ4
JotronAS|TR7750:OperatorshandbookÎLISTOFTABLESANDFIGURES Page7Ͳ1

FIGURE3.2Ͳ2,TRANSMITTERDCINPUTCONNECTOR,REARVIEW......................................................................................3Ͳ4
FIGURE3.3Ͳ1,FRONTVIEW,RECEIVERUNIT,RAͲ7203..................................................................................................3Ͳ8
FIGURE3.4Ͳ1,REARVIEW,RECEIVERUNIT,RAͲ7203...................................................................................................3Ͳ10
FIGURE3.4Ͳ2,RECEIVERDCINPUTCONNECTOR,REARVIEW..........................................................................................3Ͳ10
FIGURE3.5Ͳ1,PSUͲ7002,FRONTVIEW.....................................................................................................................3Ͳ13
FIGURE3.6Ͳ1,POWERSUPPLYUNITͲREARVIEW..........................................................................................................3Ͳ14
FIGURE3.6Ͳ2,DCINPUTCONNECTOR,PSU................................................................................................................3Ͳ14
FIGURE3.6Ͳ3,DCOUTPUT,PSU..............................................................................................................................3Ͳ14
FIGURE3.6Ͳ4,ACINPUTCONNECTOR,PSU................................................................................................................3Ͳ15
FIGURE4.3Ͳ1,EXAMPLESOFVARIOUSCONFIGURATIONS..................................................................................................4Ͳ2
FIGURE4.6Ͳ1,AUDIOINTERFACESONTHETRANSMITTERANDRECEIVERUNITS.....................................................................4Ͳ5
FIGURE4.6Ͳ2,KEYSIGNALSONTHETRANSMITTERUNIT...................................................................................................4Ͳ9
FIGURE4.6Ͳ3,SQUELCHANDAGCSIGNALSRECEIVERUNIT............................................................................................4Ͳ11
FIGURE4.6Ͳ4,ALARMANDSELECTSIGNALS,TRANSMITTER.............................................................................................4Ͳ13
FIGURE4.6Ͳ5,MISCSIGNALS,TRANSMITTER................................................................................................................4Ͳ15
FIGURE4.7Ͳ1,TRANSCEIVER,LOCALCONFIGURATION,INTERFACING................................................................................4Ͳ17
FIGURE4.7Ͳ2,TRANSCEIVER,REMOTECONFIGURATIONWITH2WIREAUDIOINTERFACE......................................................4Ͳ19
FIGURE4.7Ͳ3,TRANSCEIVER,REMOTECONFIGURATIONWITH4WIREAUDIOINTERFACE......................................................4Ͳ20
FIGURE4.7Ͳ4,MAIN/BACKUPTRANSMITTER.............................................................................................................4Ͳ22
FIGURE4.7Ͳ5,MAIN/BACKUPRECEIVER....................................................................................................................4Ͳ23
FIGURE4.7Ͳ6,TRANSCEIVER,VDLMODE2CONFIGURATION..........................................................................................4Ͳ24
FIGURE5.4Ͳ1,RADIOCONTROLGROUP,TRANSMITTER....................................................................................................5Ͳ6
FIGURE5.4Ͳ2,TXCONFIGGROUP,TRANSMITTER............................................................................................................5Ͳ6
FIGURE5.4Ͳ3,INTERFACECONFIGGROUP,TRANSMITTER.................................................................................................5Ͳ7
FIGURE5.4Ͳ4,BITESYSTEMGROUP,TRANSMITTER.........................................................................................................5Ͳ8
FIGURE5.4Ͳ5,SYSTEMINFOGROUP,TRANSMITTER.........................................................................................................5Ͳ8
FIGURE5.8Ͳ1,RADIOCONTROLGROUP,RECEIVER........................................................................................................5Ͳ19
FIGURE5.8Ͳ2,RXCONFIGGROUP,RECEIVER...............................................................................................................5Ͳ19
FIGURE5.8Ͳ3,INTERFACECONFIGGROUP,RECEIVER.....................................................................................................5Ͳ20
FIGURE5.8Ͳ4,BITESYSTEMGROUP,RECEIVER.............................................................................................................5Ͳ21
FIGURE5.8Ͳ5,SYSTEMINFOGROUP,RECEIVER.............................................................................................................5Ͳ21
FIGURE6.1Ͳ1,TRANSMITTERPAMODULE,ERRORSANDCORRECTIVEACTIONS.....................................................................6Ͳ2
FIGURE6.1Ͳ2,TRANSMITTERMODULATORMODULE,ERRORSANDCORRECTIVEACTIONS.......................................................6Ͳ3
FIGURE6.1Ͳ3,TRANSMITTERMAINMODULE,ERRORSANDCORRECTIVEACTIONS.................................................................6Ͳ4
FIGURE6.2Ͳ1,RECEIVERPOWERMODULE,ERRORSANDCORRECTIVEACTIONS.....................................................................6Ͳ6
FIGURE6.2Ͳ2,RECEIVERRFMODULE,ERRORSANDCORRECTIVEACTIONS...........................................................................6Ͳ7
FIGURE6.2Ͳ3,RECEIVERMAINMODULE,ERRORSANDCORRECTIVEACTIONS.......................................................................6Ͳ8

JotronAS|TR7750:OperatorshandbookÎLISTOFTABLESANDFIGURES Page7Ͳ2

Operators-Manual VDL PDF

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1 OH 31.1.08 All 84417_OP&INST_TR7750_A Newlayoutandtext

General,allunits AM25kHz AM8.33kHz AMMSK D8PSK

Scroll / Select Navigation

2 2 RS485 - serial communication

4 4 TX BUSY TTL L=transmitting (RX pullup)

2 Set the Mute on transmit to enabled (receiver) 5.9.2 - RX config group

Alternatively, use separate antennas for the TA and RA.

Other useful signals in Local configuration:

TA – RS485, Line input, Key, Squelch, Alarm 3.2.7 (transmitter REM)

2 Set Mute on transmit to enabled (receiver) – if desired 5.9.2 - RX config group

Alternatively, use separate antennas for the TA and RA.

Other useful signals in Remote configuration:

TA – RS485, Line input, Key, Squelch, Alarm 3.2.7 (transmitter REM)

Alternatively, use separate antennas for the TA and RA.

Other useful signals in Remote configuration:

TA – RS485, Line input, Key, Squelch, Alarm 3.2.7 (transmitter REM)

Alternatively use an external antenna change over unit (ACU) in

Alternatively use an external antenna change over unit (ACU) in

The antenna connection can also be done via a pair of

Alternatively, use separate antennas for the TA and RA.

Other useful signals when operation on VDL mode 2

TA – Squelch, Alarm 3.2.7 (transmitter REM)

Operation mode Low power level AM Climax Modulation Alarm Standby

AM Audio Keying Calibrate VDL mode 2*

Access control Alarm config RS485 RS232 Rack

Operation mode Modulation Alarm Standby

AM Audio Squelch Calibrate VDL mode 2*

Access control Alarm config RS485 RS232 Rack

High SWR High Current High 28V

Action: Action: Action: Action:

LO level LO lock detect 6V

Action: Action: Action:

Probable cause: Probable cause: Probable cause:

Ethernet Codec DSP Front

Action: Action: Action: Action:

High High Current 12V

Action: Action: Action:

LO level LO lock detect LNA current IF current

Action: Action: Action: Action:

Probable cause: Probable cause: Probable cause: Probable cause:

Ethernet Codec DSP Front

Action: Action: Action: Action:

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