Yaesu FT-897 Technical Supplement

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

Contents

20AlignmentFM Modulation Adjustmentr Tune the transceiver to the 144 MHz band in the FMmode. Connect the FM linear detector to the antennaconnector via an appropriate attenuator. Select menuitem “61: DEV-W.” Inject a 15 mV audio signal at 1kHz from the audio generator.r Key the transceiver and adjust this parameter for amaximum deviation of ±4.5 kHz (±0.2 kHz) on theFM linear detector.r Change the menu item to “62: DEV-N.” Key the trans-ceiver and adjust this parameter for maximum devia-tion of ±2.25 kHz (±0.1 kHz) on the FM linear detector.r Change the menu item to “63: M-MTR.” Key the trans-ceiver and set this parameter for an “S-9” indicationon the S-meter on the LCD.r Change the menu item to “64: DTMF”. Key the trans-ceiver with DTMF signal input (press any DTMF keyon the MH-36E8J microphone) and adjust this param-eter for a maximum deviation of ±3.5 kHz (±0.3 kHz)on the FM linear detector.r Change the menu item to “65: CTCSS”. Key the trans-ceiver without microphone input and adjust this pa-rameter for a maximum deviation of ±0.7 kHz (±0.1kHz) on the FM linear detector.r Change the menu item to “66: DCS”. Key the trans-ceiver without microphone input and adjust this pa-rameter for a maximum deviation of ±0.7 kHz (±0.2kHz) on the FM linear detector.SSB Carrier Point Adjustmentr Tune the transceiver to the 21 MHz band. Select menuitem “67: LSB-CP.” Set the mode to LSB, and inject a1.0 mV audio signal from the audio generator into theMIC jack.r Lower the audio frequency down to 400 Hz and adjustthis parameter for 20 W output power from the trans-ceiver.r Change the audio frequency to 2600 Hz, and confirmthat the output power is at least 20 W (± 2 W).r The adjustment for the USB carrier point is performedin the same manner as done for LSB by changing thetransmission mode to USB and the menu item to “68:USB-CP.”VSWR Adjustmentr Connect a 100-Ohm dummy load to the antenna con-nector.r Tune the transceiver to the 14 MHz band in the CWmode.r Select menu item “69: SWR2.” Key the transceiverand press the [A] key to set this parameter.r Connect a 150-Ohm dummy load to the antenna con-nector.r Select menu item “70: SWR3.” Key the transceiverand press the [A] key to set this parameter.ATAS control voltage confirmationr Connect the DC voltmeter to the ANT (HF/50 MHz)jack.r Select menu item “71: ATAS.”r Press the [A] key, and confirm that the voltage is 9.0 to10.0 Volts.r Press the [B] key, and confirm that the voltage is 7.5to 8.5 Volts.r Press the [C] key, and confirm that the voltage is morethan 10.5 Volts.This completes the internal alignment routine for allbands. To save all settings and exit, press and hold in the[F] key for at least 0.5 second.