Vco Vcv Adjustment; Dc Voltmeter; Tx-Main-Unit; Rx-Main-Unit - Yaesu DR-1X Technical Supplement

VCO VCV Adjustment

Connect the DC voltmeter to TP1503 (TX-MAIN-
UNIT) and TP5502 (RX-MAIN-UNIT). Referring
to the table below, turn the transceiver to each fre-
quency listed. Confirm that the correct voltage is
present, or adjust the listed setting for the required
voltage.

TX-MAIN-UNIT

Tune to:
440.05 MHz
146.05 MHz

RX-MAIN-UNIT

Tune to:
440.05 MHz
146.05 MHz
TP1503
TX-MAIN-UNIT
TX/RX for
TX 2.1 ± 0.4 V
TX 2.0 ± 0.4 V
TX/RX for
RX 2.6 ± 0.4 V
RX 1.2 ± 0.4 V

DC Voltmeter

1. Set the power supply voltage to 13.8 V.
2. Press the [ P1 ] key of the Microphone to set the
alignment menu Item to "Adj 10 BAT".
3. Press the [ P3 ] key of the Microphone, to save
the new setting.
ALIGNMENT-3
Alignment
TP5502
RX-MAIN-UNIT
DR-1X/XE Technical Supplement