T6T Transmitter User GuideIssue 1Handbook Title: T6T Transmitter User GuideHandbook Part Number: 31-360000TXIssue Number: 1Date of Issue: November 1999Published By: Park Air ElectronicsNorthfieldsMarket DeepingPeterboroughEngland PE6 8UETelephone: From UK, 01778 345434From outside UK, 44 1778 345434Fax: From UK, 01778 342877From outside UK, 44 1778 342877Page iiNotice for the USA: FCC Statement.This device complies with Parts 15 and 87 of the FCCrules. Operation is subject to the condition thatthis device does not cause harmful interference.Thisequipment iscertifiedforoperationonlywith25kHzchannel spacing. Operationon8.33 kHz is restricted to European countries.Handbook Amendment RecordAmendments to this handbook, originated by Park Air Electronics, are listed in the following table.AmendmentNumberDate Brief DetailsPAE ChangeNote Number1 Feb '00 Display time out changed from 30 seconds to2 minutes.Additional information given regardinginterruptive BIT tests-2 Jun '00FCC statement added to page ii, and in Section 2page 17.3836Equipment Modification RecordModifications to the T6T transmitter are detailed in the following table.The equipments modification label shows modifications embodied in the equipment.ModificationNumberDate Brief DetailsPAE ChangeNote NumberPageiiiList of AbbreviationsThe following abbreviations are used in this user guide:Page ivA ampAM amplitude modulationBIT built-in testdB decibelDSP digital signal processingEMC electro magnetic compatibilityESSDs electro static sensitive devicesETI elapsed time indicatorFM frequency modulationICAO international civil aviationorganisationkg kilogramkHz kilo hertzLCD liquid crystal displaymA milliampMARC multi-access remote controlMHz mega hertzmm millimetrePC personal computerppm parts per millionPSK phase shift keyingPTT press to talkRF PA Radio frequency power amplifierrms root mean square(S+N):N signal-to-noise ratioV voltVFP virtual front panelVHF very high frequencyVOGAD voice operated gain adjustingdeviceVSWR voltage standing wave ratioSection 1 General InformationPagevPageContentsChapter 1. OverviewIntroduction to the T6T Transmitter 3T6T Handbooks 3Operational Settings 4Virtual Front Panel 5Built-in Tests 5Transmitter Variants 6Configuring the T6T Transmitter 6Chapter 2. SpecificationDimensions and Weight 9RF Characteristics 9Environmental 10Power Requirements 10Chapter 3. Controls, Indicators, and ConnectorsFront Panel 11Transmit Indicator 11Alarm Indicator 11Ready Indicator 11Standby Indicator 12Reference Connector 12Microphone/Diagnostics Connector 12Scroll/Select Switch and LCD 13Rear Panel 14Power Switch 14AC Input Connector 14DC Input Connector 15Fuse F1 15Chassis Stud Connection 15Facilities Connector CN5 15MARC Port CN6 16Computer Port CN7 16Antenna Connector 16Chapter 4. Installation ProceduresIntroduction 21Initial Inspection of the Transmitter 22Fitting the Correct AC Input Fuse 22Selecting the Correct AC Input Tap 23Selecting the Keying Method 24Fitting a Radio into an Equipment Rack 25Connecting Remote Facilities 25Chassis Stud Connection 26AC Supply Connection 26DC Supply Connection 27Connecting an Antenna 27Switching On 27Section 2 AM Voice ModePageviChapter 1. AM-Voice OverviewIntroduction to AM-voice Mode 3Carrier Offset Operation 3Operational Settings 4Basic Configuration 4Local Operation 4Remote Operation 5Configuration for Operation with MARC 6Chapter 2. AM-Voice SpecificationRF Characteristics 7Modulation Characteristics 7Chapter 3. AM-Voice InstallationIntroduction 9Selecting the Applicable Keying Method 10Remote Keying Configurations 11Phantom Keying Configurations 12Connecting the Remote Facilities 14Connecting to MARC Equipment 14Chapter 4. AM-Voice Operational SettingsIntroduction 17Normal Operation 17Using the Scroll/Select Switch 17Screen Protocol 18Menu Lock Screen 20Notes for Setting Up the Transmitter 21Front Panel Display for 25 kHz and 8.33 kHz Channel Spacing 21Line Level 22To Enter Standby Mode 23To Exit Standby Mode 24AM-Voice Settings Procedure 25General Transmitter Settings 29Setting the Operating Frequency 34Allocating Channel Numbers to Specified Frequencies 35To Recall Channel Frequencies 36To initiate an Interruptive BIT Test 37To View BIT Pages and Advise Screen 38Elapsed Time Indicator 39Displaying the Transmitter's Internal Reference Frequency Screen 40Software Versions Screen 41PageT6T Transmitter User GuideSection 1General InformationT6T General Information Section 1Page1Intentionally BlankSection 1 T6T General InformationPage 2Chapter 1. OverviewThis chapter provides an introduction to the T6T transmitter, briefly describes the features, andshows how the radio is configured for operational use.INTRODUCTION TO THE T6T TRANSMITTERParkAir Electronics(PAE) T6TisaVHFmulti-modeair trafficcontrol transmitter compatiblewithanalogue(AM)anddigital (D8PSK)modulationmodes.CurrentmodelsaresuppliedprogrammedforAM-voiceoperationinthefrequencyrange118to136.975MHzusing25kHzor 8.33kHzchannelspacing. Future software upgrades will allow D8PSK operation.Thetransmitterproducesa50wattcarrieroutputthatcanbereduced,in1wattsteps,to5watts.Theoutput power, and the majority of operational settings, can be selected at the front panel, using the virtualfront panel (VFP) or through a compatible control and data systemsuch as the PAE multi-access remotecontrol (MARC) system.Amulti-channel featureallowsupto100frequencychannelstobestoredandrecalledbychannelnumber.Thetransmitterisdesignedtobefittedinanindustrial19inch(483mm)equipmentrack.Operationisfrom either a standard ac mains supply, or from a low voltage dc supply. When both input supplies areconnected, the dc supply acts as a back-up if the mains supply fails.Comprehensivecontinuousandinterruptivebuilt-intests(BIT)provideconfidenceofthetransmitter'sserviceability.T6T HANDBOOKSThis user guide describes the T6T transmitter and gives complete installation and setting up procedures.The user guide is split into sections as follows:Section 1. Section 1 (this section) provides general information that is common to alloperating modes.Section 2. Section 2 provides information that is specific to operating the T6T transmitterin AM-voice mode.Section 3. Section 3 onwards will, when available, describe the digital operating modes.Amaintenancekit (PAEpart number 70-6350MKIT) is alsoavailable. Amaintenancehandbook,included in the kit, contains fault finding guides to module level and details VFP operation. The VFP canbe used for setting up, maintenance purposes, and for loading new software.ThemaintenancekitincludesaCD-ROMcontainingtheVFPsoftwareandaleadforconnectingtheradio to a Personal Computer (PC). The CD-ROM also contains the software as loaded into the T6T atthetimeof sale. Thisenablestheoriginal softwaretobere-loadedif thetransmitter'sDigital SignalProcessing (DSP) module is ever replaced.Both the user guide and maintenance handbook are available on CD-ROM. Contact PAE for details.T6T General Information Section 1Page3T6T transmitter maintenance should not be attempted without referenceto the maintenance handbookOPERATIONAL SETTINGSOperational settingsfor theT6Ttransmitter areconfiguredat thefront panel, throughtheVFP, orthroughanassociatedMARCsystem(or compatiblecontrol anddatasystem). At thetransmitter,operational settings are selected and displayed using the front panel Scroll/Select switch and the LCD.Thesettingsareselectedthroughaseriesofmenus.Full detailsaregiveninthesectionofthisuserguideapplicabletotheoperatingmode. Twoexampleselectionmenus, Set FrequencymenuandChannel Storage menu, are shown below.1 2 1 . 5 0 0 MH zCa n c e l OKCh 1 0 0 1 2 1 . 5 0 0 MH zCa n c e lS t o r eS t o r e a n d E n dDuring normal transmitter operation, the Main screen, shown below, is displayed. The screen shows theoperating frequency, the channel number (if the channel store facility is used), the carrier offset (if used inAM-voice mode), and displays a graphical representation of instantaneous peak power.F r e q 1 2 3 . 0 0 0 MH zCh a n 1O f f s e t + 5 . 0 k H zPw r I I I I I I I I I I I ISection 1 T6T General InformationPage 4F r e q 1 2 3 . 0 0 0 MHzC h a n 1Of f s e t + 5 . 0 k HzP w r l l l l l l l l l l lExample MainScreenExample SetFrequency MenuExample ChannelStorage MenuVirtual Front PanelAsanalternativetosettingupthetransmitterfromthefrontpanel,theT6T'svirtual frontpanel (VFP)software can be used. To use the VFP, an IBM compatible PC must be connected to the transmitter(see Fig. 1-1). Using the VFP offers several advantages over setting up from a transmitter's front panel.These are:q When set up using the VFP, a profile of the transmitter's operational settings can be created.The profile can then be used to automatically set up other radios within a system, or to reset aradio should its DSP module ever be replaced.q When using the VFP, the transmitter's front panel can be locked. This means that atransmitter'ssettingscannot inadvertentlybechangedbytamperingwiththefront panelcontrols.q A print-out of a transmitter's profile (all the operational settings) can be made from the VFP.Instructions on VFP usage is outside the scope of this user guide. Reference, therefore, should be madeto the T6T maintenance handbook that is supplied with a CD-ROM containing the VFP software.BUILT-IN TESTSThe transmitter continuously self monitors key internal parameters without affecting normal operation. Ifa BIT fault is detected, the front panel Alarm indicator lights, the Ready indicator becomes unlit, and thetransmitter becomes inoperable.Additionally, a BIT warning, as opposed to a BIT fault may be indicated. A BIT warning is shown by thefront panel Alarmindicator flashing; the Ready indicator remains lit and the transmitter remainsoperational, but at reduced power.Apartfromcontinuousmonitoring,aninterruptiveBITtestcanbeinitiatedlocallyatthefrontpanel,orremotely. Wheninitiated, test signalsareinjectedthat keythetransmitterallowingparameterstobemonitored in their active state.Theresultsofcontinuousmonitoring,andofinterruptivetesting,areavailableatthefrontpanel LCD.WhenthetransmitterisusedwithaMARCsystem(orothercompatibledataandcontrol system)theresults are also sent, in the formof a data message, to the monitoring facility. A full description of the BITfacilities is given in the section applicable to the required operating mode. The following two illustrationsshow example front panel BIT displays.T6T General Information Section 1Page5VSWR PASSPA T e mp 8 0 CS y n t h L o c k P a s s< < > >RF D r i v e PASSFwd P owe r 2 5WR f l P owe r 2W< < > >TRANSMITTER VARIANTSTwo variants of the T6T transmitter are available:q B6350. ThismodeloperatesinallmodesexceptinAM-voicewhenusinga5-carrieroffset.The frequency stability of this model is 1 ppm.q B6350OPT1. Thismodel operatesinall modesincludingAM-voicewhenusinga5-carrieroffset. The frequency stability of this model is 0.25 ppm.CONFIGURING THE T6T TRANSMITTERFig.1-1showsthesignal connectorsfittedtothetransmitter'sfrontandrearpanels.Theconnectorsusedtoconfigurethetransmitter dependontherequiredoperatingmode. Thepurposeof eachconnector isbrieflydescribedinthefollowingparagraphsandfullydetailedinchapter 3startingonpage 11.Antenna Connector Usedinall operatingmodestoconnect the50ohmantennafeedercable.Microphone/DiagnosticsConnectorThis is a dual purpose connector. A microphone/headset (complete withintegral PTT switch) can be connected to enable local AM-voiceoperation.Alternatively, a PC can be connected to allow use of the VFP. The VFPcan be used to set the transmitter's operational settings, or to downloadnew software.Reference Connector Used in all operating modes to check and reset the transmitter'sreference frequency.Facilities Connector Usedprimarilytoconnect remotesignalswhenusingAM-voicemodeand the transmitter does not form part of a MARC system.Someauxiliary signals availableat this connector, for examplethe24 volt (nominal) unregulated output supply, can be utilized irrespectiveof the operating mode.MARC Port The MARC port is used to connect remote signals when the transmitterformspart of aMARCsystem, or other compatiblecontrol anddatasystem.Computer Port Thecomputerportisusedindigital communicationmodestoconnectthe transmitter to a control computer.Section 1 T6T General InformationPage 6T6T General Information Section 1Page7Fig. 1-1. T6T Transmitter ConfigurationT6T TransmitterAntennaConnectorMicrophone/DiagnosticsConnectorMicrophone/headsetfor local AM operation.PC to allow use of the VFPand to download newsoftware.ReferenceConnectorFrequency counter formaintenance purposes.FacilitiesConnectorRemote signals.ComputerPortSignals to/from a controlcomputer. Used whenoperating in digitalcommunication modes.MARCPortSignals to/from anRSE 2 equipment. Usedwhen the radio formspart of a MARC system.Intentionally BlankSection 1 T6T General InformationPage 8Chapter 2. SpecificationThis chapter contains the T6T transmitter's specification that is common to all operating modes.Specifications relevant to specific operating modes are contained in the section applicable to therequired operating mode.DIMENSIONS AND WEIGHTThe dimensions and weight of the T6T transmitter are:Width 483 mm (19 inches).Height 88.9 mm (3.5 inches). The height occupies 2U ofequipment cabinet space.Depth (front panel to rear panel) 430 mm (16.9 inches).Depth (front panel to rear of fan) 450 mm (17.7 inches).Weight 15.6 kg (34.4 pounds).RF CHARACTERISTICSFrequency range 118 to 136.975 MHz.Output carrier power The output power is adjustable between 5 and 50 watts.Number of channels The transmitter has a multi-channel capability.100 channels can be stored and recalled.Frequency accuracy Better than 1 ppm for transmitter B6350.Better than 0.25 ppm for transmitter B6350OPT1.Protection Excessive VSWR. The transmitter will transmit at fullpower into a VSWR of up to 2.5:1. At a higher VSWRthe output power will be reduced by 10 dB1 dB, ifnecessary, in order to protect the transmitter.Provision is made via the facilities port to allow anexternal VSWR signal to be monitored. This is requiredwhen isolators are employed that shield the transmitterfrom a VSWR fault at the antenna.PA Overheating. If the RF PA temperature exceeds80C, the output power is reduced by 6 dB 1 dB and aBIT warning indicated.If the RF PA temperature exceeds 90C the transmitterde-keys and a BIT alarm is indicated.T6T General Information Section 1Page9Control Loop Error. If the cartesian control loop goesout of limits, for example, due to low supply volts, theoutput power gradually reduces by up to 3 dB until theloop regains stability. If this fails to stabilise the loop thetransmitter de-keys and a BIT alarm is indicated.Harmonic outputs Harmonic outputs are below -36 dBm.ENVIRONMENTALTemperature range The transmitter operates to specification at temperaturesbetween -20 and +55C and at a relative humiditybetween 5% and 90% (non-condensing).Duty cycle 100%.Warm up time The transmitter is fully operational 5 seconds afterswitch on.Storage The transmitter can be stored at temperatures between-30 and +70C without causing damage.Cooling The transmitter has an integral cooling fan.POWER REQUIREMENTSThetransmitter operates fromanac input supply, or adc input supply. Whenbothsupplies areconnected, the dc input acts as an automatic backup supply for the ac mains.ac input supply The transmitter operates from a 48 to 62 Hzsingle-phase ac supply.The input voltage, measured at the equipment, can be110/120/220/230/240 V ac (10%). The correct ac inputtap must be selected to suit the input voltage.Additionally, the correct ac input fuse F2 must be fitted.See installation detail on page 23.ac power consumption Typically 330 VA. 500 VA maximum.dc input supply Between 21.6 and 32 V. Full output power capability ismaintained with a dc input between 24 and 32 V. From24 down to 21.6 V the output power graduallydecreases.dc supply current 15 amp (maximum) with a 28 volt dc input supply.Section 1 T6T General InformationPage 10Chapter 3. Controls, Indicators, and ConnectorsThis chapter details the purpose of all controls, indicators, and connectorsfitted to the transmitter's front and rear panels.FRONT PANELThefrontpanel'scontrols,indicators,andconnectorsareshownbelowanddescribedinthefollowingparagraphs.Transmit IndicatorAn amber indicator that lights when the transmitter is keyed and producing output power.Alarm IndicatorAredindicatorthat eitherflashes, orlights, whenaBITfault hasbeendetected. BITindicationsareclassified as either warnings or faults.If a warning is detected, the Alarm indicator flashes, the Ready indicator remains lit, and the transmitterremains operational. A BIT warning is indicated if:q a high PA temperature is sensedq a high VSWR is sensed.Ifafaultisdetected,theAlarmindicatorlightsandtheReadyindicatorbecomesunlit;thetransmittercannot be used.Ready IndicatorAgreen indicator that lights when the transmitter is ready for use and no BIT faults have been detected.T6T General Information Section 1Page11F r e q 1 2 3 . 0 0 0 MHzC h a n 1Of f s e t + 5 . 0 k HzP w r l l l l l l l l l l lStandby IndicatorA red indicator that lights when the transmitter is in standby mode. When in standby mode, most of thetransmitter's circuits are inactive, the front panel LCD is blanked, and the transmitter cannot be keyed.Standbymodeisselectedanddeselectedusingthefront panel Scroll/Select switchandLCD, byinitiating an instruction through a MARC system, or through the VFP. Details of front panel selection anddeselection are given in the section of this user guide applicable to the particular operating mode.Reference ConnectorAnSMBjacksocket that allowsahighimpedancefrequencycounter tomonitor thetransmitter'sreferencefrequency. This connector is usedonly for maintenancepurposes. Theinstructions forchecking and adjusting the reference frequency are given in the T6T maintenance handbook.Microphone/Diagnostics ConnectorA dual purpose connector that allows either a dynamicmicrophone(andheadsetifsidetoneisrequired)oraPCtobeconnected to the transmitter. The connector is a 7-pin selflocking DIN socket.Amicrophone/headsetwithintegralPTTswitchcanbefittedtothisconnectortoenablethetransmittertobeoperatedinlocalmode. The connections are detailed in table 1-1. A PC can alsobe connected to allow the VFP to be displayed. Using the VFP isdetailed in the T6T maintenance handbook. The connections atthe transmitter are shown in table 1-2.Table 1-1. Microphone/Headset ConnectionsHeadset/DiagnosticsConnector Pin NumberSignal Notes1 Microphone ground 0 volt.3 Microphone PTT 0 volt = PTT. 5 Vpull-up = not PTT.5 Sidetone to headset200 ohm output impedance.Maximum = 3 volt peak-to-peak.6 Microphone input 6.8 kohm, 5 mV sensitivity.Section 1 T6T General InformationPage 12Fig. 1-2.Microphone/DiagnosticsConnector Pin-Out(DEV083-05)Table 1-2. Diagnostics PC ConnectionsHeadset/DiagnosticsConnector Pin NumberSignal Notes2 Transmit data RS2324 Receive data RS2327 Ground 0 voltScroll/Select Switch and LCDThe Scroll/Select switch is used in conjunction with the LCDto select most of the transmitter'soperational settings. Useof theswitchandLCDisfullydetailedinthesectionof thisuser guideapplicabletotheparticular operatingmode. Duringnormal operation, theLCDshowstheoperatingfrequency, thechannel number(if thechannel storefacilityisused), thecarrieroffset (if used), anddisplays a graphical representation of instantaneous peak power.TheexampleLCDscreenbelowshowsthetransmitteroperatingon123.000MHz;thefrequencyhasbeen preset as channel 8; and no offset is used.F r e q 1 2 3 . 0 0 0 MH zCh a n 8Pw r I I I I I I I I I I I IT6T General Information Section 1Page13REAR PANELThe rear panel's controls, indicators, and connectors are shown in Fig. 1-3 and described in the followingparagraphs.Power SwitchA 2-way rocker switch used to switch on, and switch off, power to the transmitter's circuitry.l = OnWARNING!WhenthePOWERSWITCHissettotheOffposition,lethalvoltagesarestillpresentinthetransmitter'sinternalpowersupplycircuitry.Toensuresafeworking,theacanddcinputsupplies must be disconnected from the transmitter.AC Input ConnectorA 3-pole IEC chassis plug for connecting the ac inputsupply. The plug has an integral 20 mm fuse (F2) thatprotectstheLine(L)inputcircuit.Thefuseisratedat4amps. Detailedinstructionsregardingfusetypes,and connecting the ac supply are given in theinstallation chapter on page 26.CAUTION!Before connectinganac input supply tothetransmitter, the ac input taps must be set to suitthe local mains supply (see page 22).Section 1 T6T General InformationPage 14(DEV083-02) Fig. 1-3. Rear Panel= OffFig. 1-4. AC Mains Connector(SA3536)DC Input ConnectorA3-polechassisplugforconnectingthedcinput supply.Detailed instructions for connecting the dc supply are givenin the installation chapter of this handbook on page 27.Fuse F1Fuse F1 protects the dc input positive supply circuit. It is a size 0 fuse rated at 15 amps. The PAE partnumber of the fuse is: 29-01350201.Chassis Stud ConnectionThe chassis stud is used to provide a common earth point between the transmitter and the associatedequipment rack, or the transmitter and the user's systemearth. The stud must not be used as a safetyearth. Connection details are given on page 26.Facilities Connector CN5A 15-way D-type socket used primarily to connect remote signals when the transmitter operates in AMmodeanddoesnotformpartofaMARC(orsimilar)system.Thepin-outofthisconnectorisgivenintable 1-3 on page 17.Apart fromallowingconnectionof remotesignals, thisconnectormakessomeauxiliarysignalsavailabletotheuser.Forexample,a24volt (nominal) unregulatedoutput supply. Theauxiliarysignalscanbeemployedbytheuserasandwhenrequiredirrespectiveofthe operating mode.Fig. 1-6 shows the facilities connector CN5 as seen when looking atthe rear panel. Connections should be made using a 15-way D-typeplug, PAEpart number: 20-01150100 (plug), and 20-09150101(cover). These are supplied with the transmitter as item 3 (see page22).T6T General Information Section 1Page15Fig. 1-5. DC Connector(DEV083-06)Fig. 1-6. Facilities ConnectorCN5 Pin-OutMARC Port CN6A9-wayD-typesocketusedtoconnectremotesignalstoaMARCsystemorothercompatiblecontroland data system. The pin-out of this connector is given in table 1-4 on page 18.Computer Port CN7A25-wayD-typesocketusedtoconnectthetransmittertoacontrolcomputerwhenthetransmitterisoperated in digital communication modes. The pin-out of this connector is given in table 1-5 on page 19.Antenna ConnectorAn N-type 50 ohm coaxial socket used to connect the antenna's feeder cable.Section 1 T6T General InformationPage 16Fig. 1-7. MARC Port CN6 Pin-OutMARCconnector CN6 as seen when looking at the rear panel.Connectionsshouldbemadeusinga9-wayD-typeplug, PAEpartnumber: 20-01090100 (plug), and 20-09090101 (cover).Fig. 1-8. Computer Port CN7 Pin-OutComputer port CN7 as seen when looking at the rear panel.Connections should be made using a 25-way D-type plug, PAE partnumber: 20-01250100 (plug), and 20-09250101 (cover).Table 1-3. Facilities Connector CN5 Pin-OutPinNumberSignal Name Description1 Ground 0 volt.2 Line In (+) Pins2and3present a600ohmbalancedaudioinput tothetransmitter for useinAMmodes. Theinput level isadjustablebetween -40 dBm and 0 dBm. Phantom keying can besuperimposedontheaudiolines. SeeSelectingtheApplicableKeying Method in section 2 on page 10.3 Line In (-)4 External VSWRAninputsignal tothetransmittertoindicateaVSWRfaultintheantenna circuit. When this signal is active, the transmitter's outputpower is reduced by 10 dB and a VSWR warning is indicated. Thisis a TTL input pulled-up to 5 V; the active signal is 0 volt.5AntennaChange-OverAn output signal that can be used to control an antennachange-over relay when the transmitter is used in conjunction with aT6Rreceiver. Antennachange-over is agroundingoutput; theactive(transmitterkeyed)polarityisalwaysthesameasthePTToutput signal on pin 6. Maximum current sink is 100 mA.6 PTT OutputThis output, when active, indicates the transmitter is keyed. It is agroundingoutput.Theactivepolarityissetfromthefrontpanel.Maximum current sink is 100 mA.7 Remote PTTAn input signal used to key the transmitter. The active signal can be0 volt, or a dc level between +10 and +50 volt, or a dc level between-10 and -50 volt. Internal jumpers JP8 and JP9 must be correctly set tosuit the required keying potential (see Remote Keying Configurationsinsection2onpage11). Theactivepolarity is set fromthefront panel.8 Ground 0 volt.9 Unregulated SupplyA dc output supply between 21.6 and 32 volt. The supply is fusedat 500 mA.10 Tx InhibitThis input signal, whenactive, prevents theradiofrombeingkeyed. This is a TTL input pulled-up to 5 V; the active polarity is setfrom the front panel.11 BIT Interruptive TestAninputsignalthatinitiatesaBITinterruptivetest.ThisisaTTLinput pulled-up to 5 V. The active polarity of this signal is set fromthefrontpanel.Theinputsignalmustbeactiveforaminimumof300ms; thesignal cannot thenbeactivatedagainfor at least3 seconds.12 Not UsedPin12isinternallyconnected. Donot makeanyconnectionstothis pin.13 Ready OutputThisoutput isactivewhentheradioisreadytotransmit andnofaults have been detected by the BITcircuitry. It is an opencollector output. The active polarity is set from the front panel.14 Tape OutputAn audio output for connection to a recording system. The outputis nominally -10 dBm into 100 ohm.15 Not Used -T6T General Information Section 1Page17Table 1-4. MARC Connector CN6 Pin-OutPinNumberSignal Name Description1 Ground 0 volt.2 Line In (+) Pins 2 and 3 present a 600 ohmbalanced audio input to thetransmitter for use in AMmodes. The input level isadjustablebetween-40dBmand0dBm.Phantomkeyingcan be superimposed on the audio lines. See Selecting theApplicable Keying Method in section 2 on page 10.3 Line In (-)4 PTTAninput signal usedtokey thetransmitter. Theactivesignal can be 0 volt, or a dc level between +10 and +50 volt,or a dc level between -10 and -50 volt. Internal jumpers JP8andJP9must becorrectlyset tosuit therequiredkeyingpotential (see Remote Keying Configurations in section 2on page 11). The active polarity is set fromthe front panel.5 Unregulated SupplyAdcoutputsupplybetween21.6and32volt.Thesupply,whichisfusedat500mA,isusedasthepowersourceforthe MARC RSE 2 equipment.6 Data In (+) RS422 data line.7 Data In (-) RS422 data line.8 Data Out (+) RS422 data line.9 Data Out (-) RS422 data line.Section 1 T6T General InformationPage 18Table 1-5. Computer Port CN7 Pin-OutCN7 Pin Number Signal Name Level Input or Output1 Ground 0 volt -2 Serial 0 TXA RS422 Output3 Serial 0 TXB RS422 Output4 Serial 0 RXA RS422 Input5 Serial 0 RXB RS422 Input6 Serial 0 CLA RS422 Output7 Serial 0 CLB RS422 Output8 Serial 1 TXA RS422 Output9 Serial 1 TXB RS422 Output10 Serial 1 RXA RS422 Input11 Serial 1 RXB RS422 Input12 Serial 1 CLA RS422 Output13 Serial 1 CLB RS422 Output14 Input A RS232 Input15 Input B RS232 Input16 Input C RS232 Input17 Input D RS232 Input18 Output A RS232 Output19 Output B RS232 Output20 Output C RS232 Output21 Output D RS232 Output22 Ground 0 volt -23 Not used - -24 Not used - -25 Not used - -T6T General Information Section 1Page19Intentionally BlankSection 1 T6T General InformationPage 20Chapter 4. Installation ProceduresThis chapter details the installation procedures for a T6T transmitter that are necessary irrespective ofwhich operating mode is to be used.WARNING. LETHAL VOLTAGES!The instructions given in this chapter involve connecting lethal voltages to thetransmitter. The instructions detailed in this chapter must be carried out only by suitablyqualified personnel.WARNING. ANTENNA RADIATION!The antenna used with the transmitter must be installed such that the resultant radiatedfield strength is below 10 W/m in areas normally accessible to personnel.WARNING. BERYLLIUM/BERYLLIA!Theequipmentcoveredbythishandbookcontainscomponentscontainingthehighlytoxic material Berylliumand/or its oxide Beryllia. These materials are particularlyhazardous if:1. Berylliummaterialsareabsorbedintobodytissuesthroughtheskin,mouth,orwound.2. The dust created by breakage of Beryllia is inhaled.3. Toxic fumes are inhaled from Beryllia/Beryllium involved in a fire.The components containing Beryllia/Beryllium are: TR5, TR6 and TR9 in thePA module.WARNING. UNAUTHORIZED MODIFICATIONS!ChangesormodificationsmadetothisequipmentthatarenotexpresslyapprovedbyPark Air Electronics, or parties authorized by Park Air Electronics, could void the usersauthority to operate the equipment.CAUTION. ESSDs!The T6T transmitter's circuitry contains Electrostatic Sensitive Devices (ESSDs).Personnel must beawareof theprecautionsnecessarytoprevent damagetosuchdevices. During installation all precautions necessary to prevent ESSD damage must betaken.INTRODUCTIONTheproceduresinthischapterdescribehowtoinstall aT6Ttransmitter. Theproceduresnecessaryduring installation are listed in table 1-6 and should be completed in the order shown.T6T General Information Section 1Page21Table 1-6 Installation ProceduresProcedure Reference1 Perform an initial inspection of the transmitter. Page 222 Fit the correct ac input fuse. Page 223 Select the correct ac input tap. Page 234 Selecting the keying method (AM-voice only). Page 245 Fit the transmitter into an equipment rack. Page 256 Connecting remote facilities Page 257 Connect the chassis stud to the rack or system earth. Page 268 Connect the ac input supply (if applicable). Page 269 Connect the dc input supply (if applicable). Page 2710 Connect an antenna. Page 27INITIAL INSPECTION OF THE TRANSMITTEROnreceiptofthetransmitterfromPAE,removealltransitpackagingandcheckthatthereisnotransitdamage. If damage is evident, contact PAE immediately and retain the original transit packaging.The following items should be included with the transmitter:Item 1. One copy of the T6T User Guide (this handbook).Item 2. An unterminated IEC mains connector.Item 3. An unterminated 15-way D-type plug (for use with the rear panel Facilitiesconnector CN5).FITTING THE CORRECT AC INPUT FUSEThemainsinputfuseF2isanintegralpartoftherearpanelacconnector(theconnectorandfuseareshown in Fig. 1-4 on page 14). The fuse type must be correct for the local mains supply. Check the fusefitted conforms to that detailed in table 1-7.Table 1-7 Input AC Fuse RatingMains Input Supply Fuse PAE Part Number110/120 V T4A 125 V UL 29C11120102S220/230/240 V T4A 250 V IEC 127 HBC 29E01120108SSection 1 T6T General InformationPage 22SELECTING THE CORRECT AC INPUT TAPThe correct tap on the input ac transformer must be selected to suit the local mains supply. The taps areselected by configuring connections on the AC Terminal Block. To set the correct tap:a. Release the M3 captive screws that secure the transmitter's top cover. Remove the cover. Referto Fig. 1-9 and identify the ACTerminal Block. Refer to Fig. 1-10 and identify the configuration thatis required for the local ac mains supply.b. Remove the two screws that secure the terminal block bracket as shown in Fig. 1-9.c. Connect the ac wires (brown = Line, and blue = Neutral) to the correct terminals. Connect link(s)as shown in Fig. 1-10.d. IfthetransmitteristobeoperatedinAM-voicemode,gotothenextprocedure.Ifoperatinginother modes, refit the top cover.T6T General Information Section 1Page23Factory default setting. The transmitter is set for a 230 V ac input unless specifiedotherwise at the time of ordering.(DEV083-08) Fig. 1-9. Location of Input Tap Terminal BlockSELECTING THE KEYING METHODThis procedure is applicable only to AM-voice mode.A number of different remote or phantom keying configurations are possible with the T6T transmitter.Internal jumpersmustbecorrectlysettosuittherequiredconfiguration.Todothis,refertosection2,chapter 3, of this user guide and follow the procedure Selecting the Applicable Keying Method.Section 1 T6T General InformationPage 240 110 120 0 110 120Blue BrownLink240 V ac Input 220 V ac Input0 110 120 0 110 120LinkBlue Brown230 V ac Input0 110 120 0 110 120LinkBlue BrownBlueBrown0 110 120 0 110 120BlueLinkBrownLink110 V ac Input0 110 120 0 110 120BlueLinkBrownLinkBlueBrown120 V ac InputFig. 1-10. Input Tap SelectionFITTING A RADIO INTO AN EQUIPMENT RACKCAUTION!It is essential that the chosen mechanical installation provides adequate support alongthe depth (front to rear) of the unit. The transmitter must not be supported by the frontpanel; doing so can cause damage.Thetransmittercanbeinstalledontelescopicslides, oronfixedrunners, withinastandard483mm(19 inch) equipment rack. M4 tapped holes, each 10 mm deep (see Fig. 1-11) are provided on each sideof the equipment to accept the slides. Details of suitable telescopic slides and fixed runners are availablefrom PAE.Whenfittedintherack,thetransmitter'sfrontpanel mustbesecuredtotherackschassisusingfourM6 x 16 mm screws and plastic washers.CONNECTING REMOTE FACILITIESRemotefacilitiesconnectionsdependonthetransmitter'soperatingmode.Todeterminetherequiredremote connections, refer to chapter 3 of the section applicable to the operating mode.T6T General Information Section 1Page25Fig. 1-11. Telescopic Slide Fixing Points (DEV083-09)CHASSIS STUD CONNECTIONWARNING. CHASSIS EARTH!A chassis stud is fitted to the transmitter's rear panel. This stud is used to connect theequipment to the equipment rack, or to the user's system earth point. The stud must notbe used as the safety earth.Inorder not tocompromisethetransmittersElectromagneticCompatibility(EMC) thechassisstud,marked and fitted to the rear panel (see Fig. 1-3 on page 14) must be connected to the equipmentrack (if a rack is being used) or to the user's system earth point. The connection should be made using asingle tri-rated, green-and-yellowcable having a cross-sectional area of 2.5 mm2. The cable should haveCSAandUL1015approval,andbeconnectedtothechassisstudthroughanM6eyelet(forexample,PAE part number 20-08010103).Failure to comply with this instruction could result in non-compliance with the EuropeanCommission EMC Directive 89/336/EEC.AC SUPPLY CONNECTIONWARNING. LETHAL VOLTAGES!The equipment is permanently connected to the mains supply when the mainsconnector is attached. Switching the rear panel Power switch to off does not isolate allinternal circuits from the mains supply. For this reason, a mains isolating switch shouldbe fitted close to, and easily accessible from, the transmitter's position.WARNING. EARTH CONNECTION!This equipment must be earthed. The earth terminal of the ACconnector should be usedas the safety earth.An ac input connector (see Fig. 1-4 on page 14) is fitted to the equipments rear panel. The cable used toconnectbetweentheequipmentandtheusersacpowersourceshouldbe3-core(toIEC227)rated250 V ac at 8 amps, and have a minimum cross-sectional area of 1.0 mm2per core. PAE recommendstheuseof polyvinyl chloride(PVC)insulatedcable. Thecablemust befittedwiththeIECapprovedequipment connector (PAE part number 20-02030102) supplied with the transmitter, and conform to thefollowing specification:q If PVCinsulated, be not lighter than ordinary polyvinyl chloride sheathed flexible cordaccording to IEC publication 227 (designation H05 VV-F, or H05 VVH2-F).q If rubber insulated, be of synthetic rubber and not lighter than ordinary tough rubber-sheathedflexiblecordaccordingtoIECpublication245titledRubber InsulatedCables of RatedVoltages up to and Including 450/750 V (designation H05 RR-F).TheT6Ttransmitter isaClass1equipment. Theacsupplycableshouldhaveagreen-and-yellowprotective earthing conductor electrically connected to the protective earthing terminal of the equipmentconnector and the mains plug. PAE recommends the ac supply cable is colour coded in accordance withthe electrical appliance (colour code) regulations for the UK. That is:q The core that is coloured green-and-yellow must be connected to the terminal in the plug thatis marked with the letter E or by the earth symbol or coloured green-and-yellow.q The core that is coloured blue must be connected to the terminal that is marked with the letterN or coloured black.q Thecorethatiscolouredbrownmustbeconnectedtotheterminal thatismarkedwiththeletter L or coloured red.Section 1 T6T General InformationPage 26DC SUPPLY CONNECTIONThetransmitteroperatesfromeitheranac,oradcinputsupply.Whenbothacanddcareconnected,operationfromtheacsupplytakespriority; automaticchange-overtothedcsupplyoccursif theacsupply fails. On restoration of the ac supply, the equipment reverts to ac operation.Adcinput supplyconnector (seeFig. 1-5onpage15) isfittedtotheequipment'srear panel. Therecommended minimumrating of the dc supply cable is: 2-core having a cross-sectional area of 1.5 mm2per core. The supply cable should be fitted with an XLR3 connector (PAE part number 20-01030106).CONNECTING AN ANTENNATheantennafeeder cableconnectstothetransmittersrear panel N-typeantennaconnector (seeFig. 1-3 on page 14).SWITCHING ONWhen installation is complete, the transmitter should be switched on at the rear panel Power switch (seepage 14).T6T General Information Section 1Page27T6T Transmitter User GuideSection 2AM-Voice ModeIntentionally BlankSection 2 T6T AM-Voice OperationPage 2Chapter 1. AM-Voice OverviewThis chapter provides an introduction to using the T6T transmitter in AM-voice mode.INTRODUCTION TO AM-VOICE MODEInAM-voicemode, theT6Ttransmitter operatesinthefrequencyrange118to136.975MHzusing25kHzor8.33kHzchannel spacing. Thetransmitterproducesa50watt carrieroutput that canbereduced, in 1 watt steps, to 5 watts. The output power, and the majority of operational settings, can beselected at the front panel or through a compatible control and data systemsuch as the PAEMulti-Access Remote Control (MARC) system.Amulti-channel featureallowsupto100frequencychannelstobestoredandrecalledbychannelnumber. In AM-voice mode, and when 25 kHz channel spacing is used, the transmitter can operate witha 2, 3, 4, or 5-carrier offset frequency in accordance with ICAO Annex 10.CARRIER OFFSET OPERATIONIn AM-voice mode the transmitter can offset the carrier frequency to provide 2, 3, 4, or 5-carrier offset tomeet the requirements of ICAOAnnex 10. Offsets are selected using the front panel Scroll/Select controland the LCD display. The offsets are:2-carrier offset: carriers are spaced at5 kHz.3-carrier offset: carriers are spaced at zero, and7.3 kHz.4-carrier offset: carriers are spaced at2.5 kHz and7.5 kHz.5-carrier offset: carriers are spaced at zero,4 kHz and8 kHz.Note ...For 5-carrier offset operation, transmitter variant B6350OPT1 must be used.T6T AM-Voice Operation Section 2Page3OPERATIONAL SETTINGSOperational settingsfor theT6Ttransmitter areconfiguredat thefront panel, throughtheVFP, orthroughanassociatedMARCsystem(or compatiblecontrol anddatasystem). At thetransmitter,operational settings are selected and displayed using the front panel Scroll/Select switch and the LCD.The settings that can be selected are:q Operating frequency q Selecting a carrier offsetq Selecting the channel spacing q Channel allocation and recallq Setting the line level q Setting the output powerq Standby mode to on or off q Setting inhibit to on or offq Setting the MARC baud rate q Setting the PTT input signal polarityq Setting the PTT output signal polarity q Setting the inhibit input signal polarityq Setting the BIT initiate signal polarity q Setting the ready output signal polarityq Settingtheantennachange-over signalpolarityq PTT test facilityq Setting the PTT time out q Setting the modulation depthq Mute enable or disable q VOGAD enable or disableq Adjusting the sidetone volume q Setting the LCD backlightBASIC CONFIGURATIONFig. 2-1 shows the basic T6T transmitter connections for AM-voice operation. If the transmitter is part of aMARCsystem,orothercompatiblecontrolanddatasystem,refertoConfigurationforOperationwithMARC on page 6.Local OperationInitssimplestconfiguration,thetransmittercanbeoperatedinLocal mode.Thisinvolvespluggingamicrophonewithintegral PTTswitchintothefront panel Microphone/Diagnostics connector. Thetransmitter is then operated from the front panel.Section 2 T6T AM-Voice OperationPage 4Remote OperationFor remote operation signals are connected from the control equipment, through a suitablecommunicationlink, tothetransmitter'srearpanel Facilitiesconnector. Essential connectionsareanaudioinput andakeyinginput. For thekeyinginput, theRemotePTTconnectioncanbeused, orphantom keying can be superimposed on the audio lines (see Selecting the Applicable Keying Methodinchapter 3). Other remotesignalscanbeconnectedtosuit theparticular application. Theremotesignals are fully described in section 1 on page 17.In the basic configuration, the rear panel MARC and Computer Port connectors are not used. The frontpanel Referenceconnector is usedtocheck thetransmitter's internal referencefrequency duringscheduled maintenance. The front panel Microphone/Diagnostics connector has two purposes: amicrophone/headset is connected for local operation, or, a PCis connected for maintenance purposes.MaintenanceusingaPCconnectedtotheHeadset/Diagnosticsconnectorisoutsidethescopeofthisuser guide. Full information is contained in the T6T maintenance handbook.T6T AM-Voice Operation Section 2Page5Fig. 2-1. T6T Transmitter - Basic ConfigurationAudioRemote PTTExternal VSWRTx InhibitBIT TestAntenna ChangeoverPTT Status SignalUnregulated SupplyReady SignalTape OutputT6T TransmitterFacilitiesConnectorAntennaConnectorMicrophone/DiagnosticsConnectorReferenceConnectorRemote SignalsMicrophone/headsetfor local operationPC for maintenancepurposesFrequency counter formaintenance purposesCONFIGURATION FOR OPERATION WITH MARCWhen the T6T transmitter is used with a MARC system or other compatible control and data system, theremote signals are connected through the rear panel MARCconnector (see Fig. 2-2). In thisconfiguration, the rear panel Facilities and Computer Port connectors are not used unless some auxiliarysignals available at the Facilities connector are required.Section 2 T6T AM-Voice OperationPage 6Fig. 2-2. T6T Transmitter - Configuration for Use with MARCMicrophone/headsetfor engineering usePC for maintenancepurposesFrequency counter formaintenance purposesAudioRemote PTTControl InformationStatus InformationUnregulated SupplyMARCRSE 2RSE 2has 8equipmentconnectorsallowing upto 8 radiosto beconnectedEquipmentConnectorT6T TransmitterAntennaConnectorMicrophone/DiagnosticsConnectorReferenceConnectorMARCConnectorChapter 2. AM-Voice SpecificationThis chapter gives the transmitter's specification applicable to AM-voice operation.RF CHARACTERISTICSChannel spacing 25 kHz, or 8.33 kHz across the frequency band 118 to136.975 MHz.Spurious outputs Spurious outputs are below -46 dBm. Spurious outputsare measured greater than 500 kHz from the carrierfrequency and with a modulation index below m= 0.9.Transmitter rise time 90% of full power is reached within 20 ms of keying thetransmitter.Transmitter decay time The output power decays by at least 20 dB, 5 ms afterthe keying potential is removed.MODULATION CHARACTERISTICSModulation depth Adjustable up to 100%.Hum and noise Greater than 45 dB below the signal level. Measuredwithin a 15 kHz bandwidth with the carrier modulated bya 1 kHz signal and at a modulation depth of 90%.Frequency response With 25 kHz channel spacing the variation in frequencyresponse, with reference to a 1 kHz signal, is within+1 dB and -3 dB across the frequency range 300 Hz to3.4 kHz. The response is better than -20 dB at 100 Hz,and less than -30 dB at 5 kHz.With 8.33 kHz channel spacing the variation infrequency response, with reference to a 1 kHz signal, iswithin +2 dB and -4 dB across the frequency range350 Hz to 2.5 kHz. Frequencies above 3.2 kHz areattenuated by at least 25 dB.Distortion With a 90% modulation depth, distortion is less than 5%at frequencies between 300 Hz and 3.4 kHz.Residual FM With a 1 kHz signal set at 80% modulation applied to thetransmitter's audio input, the unwanted frequencymodulation is less than 500 Hz.VOGAD The VOGAD has an operational range of 30 dB with thethreshold set relative to the line level setting. Within theVOGAD range, the modulation depth is maintainedwithin 10% of the set level.VOGAD has an attack time between 20 and 50 msmeasured with a 10 dB step to 15 dB into VOGAD, anda decay time greater than 2 seconds.T6T AM-Voice Operation Section 2Page7Intentionally BlankSection 2 T6T AM-Voice OperationPage 8Chapter 3. AM-Voice InstallationThis chapter details the installation procedures that are applicable only to AM-voice operation.WARNING. LETHAL VOLTAGES!The instructions given in this chapter involve connecting lethal voltages to thetransmitter. The instructions detailed in this chapter must be carried out only by suitablyqualified personnel.WARNING. ANTENNA RADIATION!The antenna used with the transmitter must be installed such that the resultant radiatedfield strength is below 10 W/m in areas normally accessible to personnel.WARNING. BERYLLIUM/BERYLLIA!Theequipmentcoveredbythishandbookcontainscomponentscontainingthehighlytoxic material Berylliumand/or its oxide Beryllia. These materials are particularlyhazardous if:1. Berylliummaterialsareabsorbedintobodytissuesthroughtheskin,mouth,orwound.2. The dust created by breakage of Beryllia is inhaled.3. Toxic fumes are inhaled from Beryllia/Beryllium involved in a fire.The components containing Beryllia/Beryllium are: TR5, TR6 and TR9 in thePA module.WARNING. UNAUTHORIZED MODIFICATIONS!ChangesormodificationsmadetothisequipmentthatarenotexpresslyapprovedbyPark Air Electronics, or parties authorized by Park Air Electronics, could void the usersauthority to operate the equipment.CAUTION. ESSDs!The T6T transmitter's circuitry contains Electrostatic Sensitive Devices (ESSDs).Personnel must beawareof theprecautionsnecessarytoprevent damagetosuchdevices. During installation all precautions necessary to prevent ESSD damage must betaken.INTRODUCTIONThe procedures in this chapter that allow a T6T transmitter to be installed for AM-voice operation are:q Selecting the applicable keying methodq Connecting remote facilities.T6T AM-Voice Operation Section 2Page9SELECTING THE APPLICABLE KEYING METHODThetransmittercanberemotelykeyedthroughtheFacilitiesconnectorCN5usingeithertheRemotePTT input, or by using Phantom Keying on the audio lines. The chosen method, and the required keyingpotential is selected by the position of two jumpers (JP8 and JP9) fitted on the transmitter's DSPmodule.Toaccessthejumpers, removetheM3captivescrewsthat securethetransmitter'stopcover(if notalreadyremoved).RemovethecoverandidentifythelinksbyreferringtoFig.2-3.Setthelinkstotherequiredpositionsasdetailedunderthenexttwoheadings:"RemoteKeying"and"PhantomKeying".When the jumpers have been configured, refit the transmitter's top cover.Section 2 T6T AM-Voice OperationPage 10Fig. 2-3. Location of Jumpers JP8 and JP9T6T transmitter with top coverremoved showing position ofDSPmodule and jumpers JP8and JP9Front PanelDSP ModulePhantom KeyingRemote Keying28V0VJP8 JP9Factory default setting. The transmitter is set for remote 0 volt keying unless specifiedotherwise at the time of ordering.REMOTE KEYING CONFIGURATIONSDuringinstallationjumpersJP8andJP9must beset tosuit theremotekeyingpotential. Thekeyingpotentials are 0 volt, a dc voltage between +10 and +50 V, or a dc voltage between -10 and -50 V.ThefollowingillustrationsshowthePTTsignal,thesettingsofjumpersJP8andJP9,andthePTTinpolarity that must be set at the front panel when completing the Operational Settings procedures.T6T AM-Voice Operation Section 2Page11Phantom KeyingRemote Keying28V0VJP8 JP9T6T Transmitter[Front panel PTT Polarity = POS]PTT Switch0 voltRemote PTT0 Volt Keying[Factory default setting]+10 to +50 Volt Keying with Positive Going Active SignalPhantom KeyingRemote Keying28V0VJP8 JP9T6T Transmitter[Front panel PTT Polarity = POS]+10 to +50 V0 VPTTPhantom KeyingRemote Keying28V0VJP8 JP9T6T Transmitter[Front panel PTT Polarity = NEG]PTT+10 to +50 V0 V+10 to +50 Volt Keying with Negative Going Active SignalPHANTOM KEYING CONFIGURATIONSPhantomkeyingcanbeusedwiththetransmitter. Thisinvolvessuperimposingadcpotential ontheaudio lines at the control equipment. The potential can be 0 volt, or between 10 and 50 volts as shown inFig. 2-4.Tousephantomkeying,thePTTswitchatthecontrolequipmentmustconnecttoacentre-taponthe600 ohm audio transformer. The keying potential is connected to the centre-tap.Atthetransmitter,jumpersJP8andJP9,fittedtotheDSPmodule,mustbecorrectlysetforphantomkeying.NotethattheaudiolinesinFig.2-4connecttothetransmitter'sFacilitiesconnectorCN5.Ifphantomkeying is required when using a MARC, or compatible control and data system, the lines connect to theMARC connector CN6 pins 2 and 3.Section 2 T6T AM-Voice OperationPage 12Phantom KeyingRemote Keying28V0VJP8 JP9T6T Transmitter[Front panel PTT Polarity = POS]0 V-10 to -50 VPTTPhantom KeyingRemote Keying28V0VJP8 JP9T6T Transmitter[Front panel PTT Polarity = NEG]PTT0 V-10 to -50 V-10 to -50 Volt Keying with Negative Going Active Signal-10 to -50 Volt Keying with Positive Going Active SignalT6T AM-Voice Operation Section 2Page13Fig. 2-4. Phantom Keying ArrangementsPhantom KeyingRemote Keying28V0VJP8 JP9Phantom KeyingRemote Keying28V0VJP8 JP9[Front panel PTT Polarity = POS][Front panel PTT Polarity = POS]CONNECTING THE REMOTE FACILITIESIf the transmitter is being used in the Basic Configuration (see Fig. 2-1 on page 5) remote signals areterminated on the rear panel Facilities connector CN5. For configurations where the T6T transmitter isbeing used with a MARC system, or other compatible data and control system, this procedure should beignored; instead, refer to Connecting to MARC Equipment.The remote facilities available at CN5 are listed in section 1 on page 17. Essential connections, unlessthe transmitter is being used only in local mode, are the audio input (pins 2 and 3) and a keying input. Thekeying input can be the Remote PTT connection on pin 7, or Phantom Keying can be used on the audiolines. Thechosenmethodmust correspondtothesettingsof internal jumpersJP8andJP9(seepage 10).Make any other connections to CN5 as required.When making connections to the Facilities connector CN5, and in order not to compromise thetransmitter's Electromagnetic Compatibility (EMC) users must:q Use a D-type connector that has a screened coverq Use screened multi-way cable, with the cable's screen connected to the Facilities connector'sshell or body.Failure to comply with this instruction could result in non-compliance withthe European Commission EMC Directive 89/336/EEC.CONNECTING TO MARC EQUIPMENTIfthetransmitterisbeingusedwithaMARCsystem,orcompatiblecontrol anddatasystem,remoteconnections are made through the rear panel MARC connector CN6.Thepin-outofCN6isshowninsection1onpage18.IfconnectingtoaMARCRSE2equipment,theconnections between CN6 and one of RSE2's Equipment Connectors is pin-to-pin as shown in table 2-1.When making connections to the Facilities connector CN6, and in order not to compromise thetransmitter's Electromagnetic Compatibility (EMC) users must:q Use a D-type connector that has a screened coverq Use screened multi-way cable, with the cable's screen connected to the Facilities connector'sshell or body.Failure to comply with this instruction could result in non-compliance withthe European Commission EMC Directive 89/336/EEC.Section 2 T6T AM-Voice OperationPage 14Table 2-1 MARC Connector CN6 to RSE 2 Equipment ConnectorT6T Transmitter RSE 2 Equipment ConnectorPinNumberSignal NamePinNumberSignal Name1 Ground 1 0 Volt2 Line In (+) 2 Audio Line L13 Line In (-) 3 Audio Line L24 PTT 4 PTT5 Unregulated Supply 5 Unregulated Supply Input6 Data In (+) 6 Data Out (+)7 Data In (-) 7 Data Out (-)8 Data Out (+) 8 Data In (+)9 Data Out (-) 9 Data In (-)T6T AM-Voice Operation Section 2Page15Intentionally BlankSection 2 T6T AM-Voice OperationPage 16Chapter 4. AM-Voice Operational SettingsThis chapter details how the T6T transmitter is set up for AM-voice operation from the front panel.It also details how to set the transmitter in and out of standby mode.The transmitter can also be set up through a MARC system, or by using the VFP. Both ofthese methods are outside the scope of this handbook; users should refer to the MARCuser guide and the T6T maintenance handbook.INTRODUCTIONSelecting most of the transmitter's operational settings is carried out using the front panel Scroll/SelectswitchandtheLCD(seetheillustrationbelow).Table2-2onpage19showsalistoftheoperationalsettings. No attempt to set up the transmitter should be made until the transmitter has been installed asper the installation procedures given in section 1 of this user guide.Normal OperationDuring normal operation, the LCDdisplays the Main screen. This screen shows the operating frequency,thechannel number(if thechannel storefacilityisused), thecarrieroffset (if used), anddisplaysagraphical representation of output power when the transmitter is keyed. If the transmitter has been set toStandby mode, which is shown by the front panel STANDBY indicator being lit, the LCD is blanked.Using the Scroll/Select SwitchTheSCROLL/SELECTswitch(referredtothroughoutthischapterastheSwitch)isusedtoleavetheMain screen and display the Options menu. Further use of the Switch displays various selection menusand allows the required parameters to be set. The switch has three actions: it can be turned clockwise,anti-clockwise, or momentarily pushed in.T6T AM-Voice Operation Section 2Page17F r e q 1 2 3 . 0 0 0 MHzC h a n 1Of f s e t + 5 . 0 k HzP w r l l l l l l l l l l lSCREEN PROTOCOLThe following protocol is applicable to all screens described in this chapter.Main Screen During normal transmitter operation, the Main screen, an example of which isshown below, is displayed.F r e q 1 2 3 . 0 0 0 MH zCh a n 1O f f s e t + 5 . 0 k H zPw r I I I I I I I I I I I ISwitch Refers to the front panel Scroll/Select switch. The switch is turned clockwise toscroll through fields from left to right, and from top to bottom. The switch isturned anti-clockwise to scroll through fields from right to left, and from bottomto top. The switch is pressed to make a selection.Time out If during any setting up procedure the Scroll/Select switch is not operated for2 minutes, the display returns to the Main screen. If editing any parameter hasnot been completed, the transmitter stays on the original setting.>> Indicates more fields are available other than those currently displayed. Toaccess those fields, turn the switch clockwise through the last displayed field. >Mode Specific Settings MenuP T T OF FP T T T i me o u t 3 0 sMo d De p t h 9 0 %> >P T T OF FP T T T i me o u t 3 0 sMo d De p t h 9 0 %> >8. Setting Mute On or Off.[Factory default setting: On]The transmitter's mute facility can be enabled or disabled.Toenableor disablethemute, ensurethatMuteDisableishighlighted. Presstheswitchto toggle between on and off. On = Muteenabled; Off = Mute disabled. When therequiredsettingishighlighted,turntheswitchclockwise to highlight VOGAD.9. Switching VOGAD On or Off.[Factory default setting: On]The transmitter's VOGAD facility can be set to on or off.To enable or disable the VOGAD, ensure thatVOGADis highlighted. Press the switch totoggle between on and off. When the requiredsetting is highlighted, turn the switch clockwiseto highlight Offset.10. Setting the Carrier Offset.[Factory default setting: 0]Acarrieroffsetcanbeusedwiththetransmitter.Theavailableoffsetsare2.5kHz, 4.0kHz,5 kHz,7.3 kHz,7.5 kHz, and8 kHz.NotethattransmittertypeB6350OPT1mustbeusedifselectingan8kHzcarrieroffset,andaseparatesettingupproceduremust becompleted. Thisprocedure, whichinvolvestheuseofexternal test equipment, is detailed in the T6T transmitter maintenance handbook.To select the required offset (0.0 kHz must beselected if no offset is used) ensure that Offsetishighlightedandpresstheswitch. Turntheswitch to display the required value, then pressthe switch. Turn the switch clockwise, through>> to highlight Headset.T6T AM-Voice Operation Section 2Page27Mu t e OF FV o g a d OF FO f f s e t 0 . 0 k Hz< < > >Mu t e OF FV o g a d OF FO f f s e t 0 . 0 k Hz< < > >Mu t e OF FV o g a d OF FO f f s e t 0 . 0 k Hz< < > >11. Adjusting the Sidetone Volume.[Factory default setting: 30%]The transmitter's sidetone volume through theheadset isadjustedfromthisscreen. Todothis,ensureHeadsetishighlightedandpressthe switch.CheckthattheVolumesettingishighlighted.Turn the switch clockwise to increase volume,or anti-clockwise to decrease volume. Thevolume increments or decrements in 5%steps. When the required setting is displayed,presstheswitch.HighlightOK,andpresstheswitchtoreturntothemodespecificsettingsmenu.Turn the switch clockwise, through >> to highlight Channel Spacing.12. Setting the Front Panel Frequency Step Size.[Factory default setting: 25 kHz]The transmitter's channel spacing can be 25 kHz, or 8.33 kHz. The radio automatically sets thecorrect channel spacing for the frequency that is entered at the front panel. This setting, which isonly for the user's convenience, alters front panel frequency step size.q If all channelstobeselectedor storedare25kHzspacedchannels, then25shouldbeselected.q Ifall channelstobeselectedorstoredare8.33kHzspacedchannels,then8.3shouldbeselected.q If a mixture of the two are required, both 25 and 8.3 should be selected.Toselect therequiredspacing, ensurethatChannelSpacingishighlightedandpresstheswitch.Check that the Channel Spacing menu isdisplayed and that Spacing is highlighted.Presstheswitchtochangebetween25kHz,8.3 kHz, and both. When the required value isdisplayed, turn the switch to highlight OK, thenpress the switch again. You will be returned tothe mode specific settings menu.13. ToexittheAM-voicesettingsprocedure,turntheswitchtohighlightOK,thenpresstheswitch.YouarereturnedtotheMainscreen. Whenthisprocedureiscomplete, gotothegeneraltransmitter settings procedure starting on the next page.Section 2 T6T AM-Voice OperationPage 28S p a c i n g 2 5 k H zCa n c e l OKHe a d s e tCh a n n e l S p a c i n gBa c kE x i tHe a d s e tCh a n n e l S p a c i n gBa c kE x i tV o l ume 0 3 0%OKGENERAL TRANSMITTER SETTINGSDuring this procedure the following parameters are set:q Setting the LCD backlight q Setting inhibit to on or offq Setting the input line level q Setting the output powerq Setting the MARC baud rate q Setting the PTT input signal polarityq Setting the PTT output signal polarity q Setting the inhibit input signal polarityq Setting the BIT initiate signal polarity q Setting the ready output signal polarityq Settingtheantennachange-over signalpolarity1. FromtheMainscreen, presstheswitchtodisplaytheOptionsmenu. Turntheswitchuntil Configure is highlighted. Press theswitch.2. EnsuretheConfiguremenuis displayed.Turn the switch until Settings is highlighted,then press the switch to display the Functionmenu.3. Ensure the Function menu is displayed. Turnthe switch until Display is highlighted.T6T AM-Voice Operation Section 2Page29F r e q u e n c yCh a n n e lCo n f i g u r eB I T E x i tOptions MenuS e t t i n g sS / W V e r s i o n sS t a n d b yBa c k E x i tConfigure MenuMo d eRe f e r e n c e F r e qD i s p l a y> >Function Menu4. Setting the LCD Backlight.[Factory default setting: 30 s]The LCD's backlight can be set to off,permanentlyon, or timedtostayonfor aperiod between 15 and 120 seconds(adjustable in 15 second steps) after theScroll/Select switch was last operated.Checkthat theFunctionmenuisdisplayedand ensure Display is highlighted. Press theswitch.EnsuretheBacklightmenuisdisplayedandtheBacklightsettingishighlighted.Rotationof the switch displays the full range ofsettings. When the required setting ishighlighted, press the switch. Turn the switchuntil OK is highlighted, then press the switch.You are returned to the Function menu.5. Setting Inhibit.[Factory default setting: Off]Inhibit can be set to either on or off. When set to on, the transmitter cannot be keyed; when set tooff thetransmitter operatesnormally. Notethat aseparateInhibit functionisavailableontheFacilities connector CN5 (see pin-out in section 1 on page 17).Fromthe Function menu, turn the switchclockwise until Inhibit is highlighted, thenpress the switch.CheckthattheInhibitmenuisdisplayedandInhibit is highlighted. Pressing the switchtoggles between on and off. When the correctsettingisdisplayedturntheswitchclockwiseto highlight OK, then press the switch. You arereturned to the Function menu.Section 2 T6T AM-Voice OperationPage 30Mo d eRe f e r e n c e F r e qD i s p l a y> >Ba c k l i g h t OF FCa n c e l OKI n h i b i tL i n e L e v e lP owe r< < > >I n h i b i t ONCa n c e l OK6. Setting the Line Level.[Factory default setting: -13 dBm]The audio line level can be set to any value between -40 dBm and 0 dBm. Some notes regardingthe optimum line level are given on page 22.Fromthe Function menu, turn the switchclockwiseuntil LineLevel ishighlighted,thenpress the switch.CheckthattheLineLevel menuisdisplayedand that Line Lvl is highlighted, then press theswitch.Turn the switch clockwise or anti-clockwise toincrease or decrease the value. When therequiredvalueisdisplayed,presstheswitch.Turn the switch to highlight OK and then presstheswitch. YouarereturnedtotheFunctionmenu.7. Setting the Output Power.[Factory default setting: 50 W]The transmitter's output power can be set to any value between 5 watts and 50 watts (in one wattsteps).Fromthe Function menu, turn the switchclockwise until Power is highlighted, thenpress the switch.Ensure that the Power menu is displayed andthat Power is highlighted.Press the switch. Turn the switch clockwise toincrease the power, or anti-clockwise todecrease the power. When the required valueis displayed, press the switch. Turn the switchclockwiseuntil OKishighlighted, thenpresstheswitch. YouarereturnedtotheFunctionmenu.T6T AM-Voice Operation Section 2Page31I n h i b i tL i n e L e v e lP owe r< < > >L i n e L v l - 1 3 d BmCa n c e l OKI n h i b i tL i n e L e v e lP owe r< < > >P owe r 5 0WCa n c e l OK8. Setting the MARC Baud Rate.[Factory default setting: 9600]ThebaudratemustbesetwhentheT6TtransmitterisconnectedtoaMARCsystem(orothercompatible data and control system). The rate can be set to 300, 600, 1200, 2400, 4800, or 9600baud. The standard setting for MARC systems is 9600 baud.Fromthe Function menu, turn the switchclockwise until MARC is highlighted, thenpress the switch.Ensure that the MARC menu is displayed andthat theBaudRateishighlighted. Presstheswitch.Turn the switch until the required value isdisplayed, then press the switch. Turn theswitchclockwiseuntil OKishighlighted, thenpress the switch. You are returned to theFunction menu.9. Polarity Settings.The polarity of the following input and output and output signals is set using the Polarity menu:q PTT input signalq PTT output signalq Inhibit input signalq BIT initiate input signalq Ready output signal.Inadditiontothesignalslisted,thepolarityofthe antenna change-over signal is determinedfromthismenu.Itisalwaysthesamepolarityas the PTT output signal.ToestablishtherequiredpolarityforthePTTinput signal, refer to the illustrations starting onpage 11 under the heading Remote Keying Configurations. Note that internal links must also becorrectly configured to obtain the required input PTT configuration.To establish the required polarity for the other input and output signals, refer to table 2-5.Tosettherequiredpolarity,turntheswitchtohighlighttherequiredparameter,thenpresstheswitch to toggle between NEG and POS.Section 2 T6T AM-Voice OperationPage 32MARCP o l a r i t yBa c kE x i t < >B I T I n i t NEGRe a d y Ou t POSBa c kE x i t < >Example BIT ScreenS y n t h L o c k PASSPA T e mp 3 0PA T e mp PASS< < > >Example BIT ScreenAd v i s eBa c k< >Re f F r e q 5 0 . 0 %Ca n c e l OKCAUTION!This procedure is included only for informational purposes. The reference frequency settingmust not be altered unless following the procedure given in the T6T maintenance handbook.External test equipment is required to set this parameter.Failure to comply with this caution may render the transmitter inoperable.SOFTWARE VERSIONS SCREENThe software versions screen allows the user to viewthe version of various software modules installed inthe transmitter. To view the software versions, use the following procedure.1. FromtheMainscreen, presstheswitchtodisplay the Options menu. Ensure thatConfigure is highlighted. Press the switch.2. EnsuretheConfiguremenuis displayed.Turn the switch until S/WVersions ishighlighted, then press the switch.3. Check the Software Versions screen isdisplayed. Select Boot, Flash, or Fillsandpress the switch to display the installedversion.4. The example shows the Boot software.Select OK, then press the switch to return tothe Software Versions screen. View theother software modules as required.T6T AM-Voice Operation Section 2Page41F r e q u e n c yCh a n n e lCo n f i g u r eB I T E x i tOptions MenuS e t t i n g sS / W V e r s i o n sS t a n d b yBa c k E x i tConfigure MenuBo o tF l a s hF i l l sBa c k E x i tSoftware Versions ScreenBo o t V e r s i o nS 0 2 7 1 V 0 0 0 1OKBoot Version Screen