Yaesu FT-897 Technical Supplement

Also see for FT-897: Manual Brochure & specs Operating manual Service manual Operating manual

Contents

13AlignmentFM TX IF Adjustmentr Tune the frequency to the 28 MHz band. Connect theRF millivoltmeter to TP1033 and leave J1002 termi-nated into a 50-Ohm dummy load.r Key the transmitter in the FM mode, and adjust T1014,T1023, and T1021 alternately for maximum indica-tion on the RF millivoltmeter.r Connect the frequency counter to TP1033.r Key the transmitter in the FM mode without micro-phone input. Adjust L1049 for a reading of 68.3300MHz (±100 Hz).Carrier Balance Adjustmentr Tune the frequency to the 14 MHz band. TerminateJ1002 into a 50-Ohm dummy load and connect a spec-trum analyzer or a RF millivoltmeter at this point.r Key the transmitter in the USB mode without micro-phone input. Adjust VR1005 for maxi-mum carriersuppression on the spectrum analyzer or for minimumindication on the RF millivoltmeter.VHF TX BPF Adjustmentr Set the frequency to 145.995 MHz. Connect the spec-trum analyzer to J1002, which should be terminatedinto a 50-Ohm dummy load.r Inject a 1 kHz tone at 1 mV level to the MIC jack.r Key the transceiver in the USB mode, and adjustT1013, T1012, and T1011 alternately for maximumindication on spectrum analyzer.UHF TX BPF Adjustmentr Set the frequency to 430.000 MHz. Connect the spec-trum analyzer to J1002, which should be terminatedinto a 50-Ohm dummy load.r Inject a 1 kHz tone at 1 mV level to the MIC jack.r Key the transceiver in the USB mode, and adjustTC1004, TC1003 and TC1002 alternately for maxi-mum indication on the spectrum analyzer.T1019T1018T1004T1005T1008TP1043TP1044T1027T1028TC1003 TC1002TC1001T1036T1037T1030T1026T1024T1035T1034T1029T1010T1009T1006TC1005T1031