Kenwood TK-3140 Service Manual

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TK-314027SignallingSignalling No. RX TX1 None None2 None 100Hz square3 LTR data LTR data4 QT 67.0Hz QT 67.0Hz5 QT 151.4Hz QT 151.4Hz6 QT 210.7Hz QT 210.7Hz7 QT 250.3Hz QT 250.3Hz8 DQT D023N DQT D023N9 DQT D754I DQT D754I10 DTMF DEC, (159D) DTMF ENC, (159D)11 None DTMF tone 912 2 tone 321.7/928.1Hz None13 Single tone 1200Hz Single tone 1200Hz14 None MSK15 MSK code MSK code• Preparations for tuning the transceiverBefore attempting to tune the transceiver, connect the unitto a suitable power supply.Whenever the transmitter is turned, the unit must beconnected to a suitable dummy load (i.e. power meter).The speaker output connector must be terminated with a16Ω dummy load and connected to an AC voltmeter and anaudio distortion meter or a SINAD measurement meter at alltimes during tuning.• Transceiver tuning(To place transceiver in tuning mode)Channel appears on LCD. Set channel according to tuningrequirements.ADJUSTMENTTest Moden Test mode operating featuresThis transceiver has a test mode.To enter test mode,press [A] key and turn power on. Hold [A] key until testchannel No. and test signalling No. appears on LCD. Testmode can be inhibited by programming. To exit test mode,switch the power on again. The following functions are availablein test mode.• ControlsControls “FCN” appears “FCN” not appears[PTT] Used when making a Used when makingtransmission. a transmission.[AUX] Unused Unused[MON] Monitor ON and OFF. Monitor ON and OFF.[LAMP] Lights the lamp for five Changes wide andseconds. narrow.Lighting is extended fora further five seconds bypressing any key whilethe lamp is lit.[S] Sets to the Tuning Sets to the Tuningmode. mode.[A] Function OFF Function ON.[B] Compander function RF power HIGH andON and OFF. LOW.[C] Beat shift ON and OFF Changes signalling.[O] to [9], Used as the DTMF Used as the DTMFand [#],[∗] keypad. If a key is keypad. If a key ispressed during trans- pressed during trans-mission, the DTMF mission, the DTMFcorresponding to the corresponding to thekey that was pressed key that was pressedis sent. (keypad model) is sent. (keypad model)[ENCODER] Changes channel. Changes channel.Note: If a [S],[A],[B],[C] key is pressed during transmission,the DTMF corresponding to the key that was pressed is sent.• LCD indicator“SCN” Unused“ ” Lights at Compander ON.“LO” Lights at RF Power Low.“P” Unused“MON” Lights at moniter ON.“SVC” Unused“ ” Unused• LED indicatorRed LED Lights during transmission. Blinks at the lowbattery voltage warning.Green LED Lights when there is a carrier.• Sub LCD indicator“FCN” appears at Function ON.“n” appears at Narrow ON.n Frequency and signallingThe set has been adjusted for the frequencies shown in thefollowing table. When required. re-adjust them following theadjustment procedure to obtain the frequencies you want inactual operation.Frequency (MHz)Channel No. KRX TX1 470. 05000 470. 100002 450. 05000 450. 100003 489. 95000 489. 900004 470. 00000 470. 000005 470. 20000 470. 200006 470. 40000 470. 400007~16