Rf Front-End Tuning - Yaesu DR-1X Technical Supplement

RF Front-end Tuning

1. Connect the DC voltmeter to TP5001 (BAND A)
and TP5002 (BAND B) on the RX-MAIN unit,
then inject a 439.050 MHz signal at a level of +10
dBμV (with 1kHz modulation ± 3.5 kHz devia-
tion) from the RF signal generator.
2. Set the RX-MAIN-UNIT frequency to 439.050
MHz.
3. Press the [ P1 ] key of the Microphone to set the
alignment menu Item to "Adj 01 TUN/A".
4. Adjust the DIAL knob for maximum deflection
on the DC Voltmeter and then turn the dialin
the opposite direction until the meter deflection
drops slightly lower than maximum.
5. Set the RX-MAIN-UNIT and RF signal genera-
tor frequency to 145.050 MHz.
6. Adjust the DIAL knob for maximum deflection
on the DC Voltmeter and then turn the dialin
the opposite direction until the meter deflection
drops slightly lower than maximum.
TP5001
7. Set the RF signal generator frequency to
439.050MHz.
8. Set the RX-MAIN-UNIT frequency to 439.050
MHz of the Band B.
9. Press the [ P2 ] key of the Microphone to set the
alignment menu Item to "Adj 01 TUN/B".
10. Adjust the DIAL knob for maximum deflection
on the DC Voltmeter and then turn the dialin
the opposite direction until the meter deflection
drops slightly lower than maximum.
11. Set the transceiver and RF signal generator fre-
quency to 145.050 MHz.
12. Adjust the DIAL knob for maximum deflection
on the DC Voltmeter and then turn the dialin
the opposite direction until the meter deflection
drops slightly lower than maximum.
RX-MAIN-UNIT
ALIGNMENT-6
Alignment
TP5002
DR-1X/XE Technical Supplement