Yaesu FT-897 Technical Supplement

Also see for FT-897D: Brochure & specs Operating manual Technical supplement

Contents

18AlignmentRX Gain AdjustmentU Select the CW mode. Tune the transceiver to the 1.8MHz band. Select “HF1RXGHF1RXGHF1RXGHF1RXGHF1RXG” in the menu by rotatingthe MEM/VFO CH knob, if necessary. Inject an RFsignal from the signal generator at 9 dBμ output.U Adjust the “HF1RXGHF1RXGHF1RXGHF1RXGHF1RXG” parameter by rotating the maindial to the point where the first dot of the S-meter (S1)appears.U The other RX gain adjustments (see the chart below)should be performed in the same way. The output lev-els of the signal generator at each frequency are shownbelow.Menu Frequency Output Level of SG01: HF1RXG01: HF1RXG01: HF1RXG01: HF1RXG01: HF1RXG 1.8 MHz Band 9 dBu02: HF2RXG02: HF2RXG02: HF2RXG02: HF2RXG02: HF2RXG 7 MHz Band 9 dBu03: HF#RXG03: HF#RXG03: HF#RXG03: HF#RXG03: HF#RXG 21 MHz Band 6 dBu04: 50MRXG04: 50MRXG04: 50MRXG04: 50MRXG04: 50MRXG 50 MHz Band 0 dBu05: VHFRXG05: VHFRXG05: VHFRXG05: VHFRXG05: VHFRXG 144 MHz Band 0 dBu06: UFFRXG06: UFFRXG06: UFFRXG06: UFFRXG06: UFFRXG 430 MHz Band 0 dBuSSB S-Meter AdjustmentU Tune the transceiver to the 21 MHz band in the CWmode. Inject an RF signal from the signal generator at36 dBμ output.U Select menu item “07: SSB-S907: SSB-S907: SSB-S907: SSB-S907: SSB-S9” and press the [A]key to set this parameter.U Tune the transceiver to the 21 MHz band in the CWmode. Inject an RF signal from the signal generator at86 dBμ output.U Select menu item “08: SSB-FS08: SSB-FS08: SSB-FS08: SSB-FS08: SSB-FS” and press the [A] keyto set this parameter.FM S-Meter AdjustmentU Tune the transceiver to the 144 MHz band in the FMmode. Inject an RF signal from the signal generator at0 dBμ output, with ±3.5 kHz deviation FM Modula-tion of a 1 kHz tone.U Select menu item “09: FM-S109: FM-S109: FM-S109: FM-S109: FM-S1” and press the [A] keyto set this parameter.U Increase the output level of the signal generator up to25 dBμ. Select menu item “10: FM-FS10: FM-FS10: FM-FS10: FM-FS10: FM-FS” and press [A]key to set this parameter.FM Center Meter AdjustmentU Tune the transceiver to the 144 MHz band in the FMmode. Inject an RF signal from the signal generator at10 dBμ output, with ±3.5 kHz deviation FM Modula-tion of a 1 kHz tone.U Set the frequency of the signal generator 3 kHz belowthe receiving frequency of the transceiver. Select menuitem “11: DISC-L11: DISC-L11: DISC-L11: DISC-L11: DISC-L” and press the [A] key to set thisparameter.U Set the frequency of the signal generator 3 kHz abovethe receiving frequency of the trans-ceiver. Select menuitem “12: DISC-H12: DISC-H12: DISC-H12: DISC-H12: DISC-H” and press the [A] key to set thisparameter.FM Squelch AdjustmentU Tune the transceiver to the 144 MHz band in the FMmode. Confirm that the squelch knob is turned fullycounterclockwise.U Inject an RF signal from the signal generator at -15dBμ output, with ±3.5 kHz deviation FM Modulationof a 1 kHz tone. Select menu item “13: FM-TH113: FM-TH113: FM-TH113: FM-TH113: FM-TH1” andpress the [A] key to set this parameter. Select menuitem “14: FM-TH214: FM-TH214: FM-TH214: FM-TH214: FM-TH2” and press the [A] key again.U Inject an RF signal from the signal generator at 0 dBμoutput, with ±3.5 kHz deviation FM Modulation of a 1kHz tone. Select menu item “15: FM-TI115: FM-TI115: FM-TI115: FM-TI115: FM-TI1” and pressthe [A] key to set this parameter. Select menu item“16: FM-TI216: FM-TI216: FM-TI216: FM-TI216: FM-TI2” and press the [A] key again.Power Supply Voltage Display AdjustmentU Tune the transceiver to the 144 MHz band in the FMmode. Confirm that the power supply voltage is 13.8V (±0.1 V).U Select menu item “17: VCC17: VCC17: VCC17: VCC17: VCC” and adjust this parametersuch that “138138138138138” is displayed on the LCD.