FT-DX400操作说明书手册and电器原理图s

INSTRUCTIONMANUALFTDx4001310L.SELECTINT:Operating frequency is con-6.RF GAINControls the gain of RF and TFtrolled by main tuning dial.5132sRX-EXT:Receiving frequency6.AF GAINVaries the gain of receiver audiois controlled by external yFoumplifier.and automatic noiseTX-EXT:Transmining frequenimi企is conected at p0llcy is controlled by external VFO.position.EXT:Operating frequency is7.MAIN TUNINGControls operating frequcncy.controlled by external VFO.8.BANDSelects operating band.CH-1 And CH-2:Crystal con-9.CLARIFIERVaries the VFO frequency slight-trolled operation.ly for receiver incremental tun-2,F日A(TDNOFF:Transceiver off.ing.and is also used as the ver-STBY:All voftages are appliednier of maia dial.to the transceiver.10.METERSelects the meter to read PACAL 100 KHz:100 KHz eali-cathode current.relative powerbrator on.output,or plate current of ALCCAL 25 KHe:25 KHz multivi-controlled stage.brator on.10.MIC GAINControls microphone gain forMOX:Manual Operation.traosmitting.and tone sigoal inPIT:Push to Talk.put for tune-up.VOX:Voice operation.11.AGCChanges receiver AGC relcaseEADPHONE JACKtime.I【CROPHONE JACKI.PRESELECTPretunes signal circuits for bothODEUSB/LSB:Side Band selection.transmit and receive condition.TUNE:Use for transmitter tone-12.PLATETunes the plate circuit of PAup.tubes.CW:Code operation,13.LOADINGTunes the output circuit of PIAM:Carrier aad one sideband.network.