Kenwood TKR-840 Service Manual

Also see for TKR-840: Brochure & specs Instruction manual

TKR-840 ADJUSTMENT76RX UNITItem11. RA OutputLevelAdjust(Wide)----(Narrow)12.RRA OutputLevelAdjust(Wide)----(Narrow)13.VotingPilot ToneAdjust(Wide)---- -(Narrow)TX UNITItem14.TX LockVoltage15.RXRefCheck16.EXTRef checkCondition1) Connect theSSG toRX IN, then select thechannel that the user will use ( Wide)MOD: 1kHzDEV: 3kHzSSG: 501μV ( -53dBm)2) - connect ffie-SSG to RXIN� then selectth-e -channel that the user will use ( Narrow)MOD: 1kHzDEV: 1. 5kHzSSG: 501μV ( -53dBm)1) Connect the SSG toRX IN, then select thechannel that the user will use ( Wide)MOD: 1kHzDEV: 3kHz__s��:_5�1�V_( -�3��ml________2) connect theSSG toRXIN, then select thechannel that the user will use ( Narrow)MOD: 1kHzDEV: 1.5kHzSSG: 501μV ( -53dBm)1) CH4 ( Center Frequency)Voting Pilot Tone: 1950HzSSG: OFF-------------------1) CH1O ( Center Frequency)Voting Pilot Tone: 1950HzSSG: OFFCondition1) CH3 ( TX A Hi)2) CH1 ( TX A Lo)3) CH6 ( TX B Hi)4) CH4 ( TX B Lo)Connect a frequency counter to CN102,then measure the frequency.1) CH2•Connect a frequency counter to CN102,then measure the frequency.•Connect a SSG toEXTREFIN.1) CH2SSG: 10MHz70.?mV ( -10dBm)MOD : OFF\-- ------------------- -2) frequency=10MHz ±10ppmMeasurementTesteauiDment Unit TerminalSSG RXINAFVM CONTROL 1/0RA Terminal(pin 11)600'2 LoadSSG RXINAFVM REMT 1/0Remote RATerminal(pin 1)600'2 LoadAFVM CONTROL 1/0RA Terminal(pin 11)MeasurementTest Unit TerminaleQuipmentD VM TX CVA/3f.counter CN102f.counterSSGAdjustment Specifications/Unit Parts Method RemarksPC ADJ400mV ±20mVPC ADJ400mV ±20mVPC ADJ400mV ±20mVAdjustment Specifications/Unit Parts Method RemarksTX TC1 4.5V ADJ ±0.1VA/3 Check 1V or moreTC2 4.5V ADJ ±0.1VCheck 1V or moreCheck 20MHz±1ppmCheck 20MHz� ------ -20MHz±10ppm