Reference Frequency - Vertex Standard VX-420 Series Service Manual

PLL VCV (Varactor Control Voltage)
Ì Connect the DC voltmeter between TP1045 on the
Main Unit and ground.
Ì Set the transceiver to CH 3 (high band edge), and ad-
just L1036 on the Main Unit for 4.0 V ± 0.1 V on the
DC voltmeter.
Ì Set the transceiver to CH 1 (low band edge), and con-
firm the low-end VCV is more than 0.9 V while re-
ceiving.
Ì Set the transceiver to CH 3 (high band edge), and ad-
just L1038 on the Main Unit for 4.0 V ± 0.1 V while
transmitting.
Ì Set the transceiver to CH 1 (low band edge), and con-
firm the low-end VCV is more than 0.9 V while trans-
mitting.

Reference Frequency

Ì Set the transceiver to CH 2 (band center) via the "CH"
box on the "Alignment" window previously.
Ì To adjustment, click the left mouse button on the "RF
Frequency" box, then press the [ ENTER ] key to open
the pop-up window.
Ì Use the [ ] or [ ] arrow keys so that the frequency
counter displays the band center frequency (±100 Hz)
for the version being aligned.
Ì Press the "OK" box to lock in the new data.
Transmitter Output Power
Ì Set the transceiver to CH 2 (band center).
Ì To adjustment, click the left mouse button on the "RF
Power {High}" or "RF Power {Low}" box, then press
the [ ENTER ] key to open the pop-up window.
Ì Use the [ ] or [ ] arrow keys so that the power meter
reading is 5.0 W (± 0.1 W) (for "RF Power High") or
1.0 W (± 0.1 W) (for "RF Power Low"). Confirm that
the current consumption is 2.3 A or lower (for "RF
Power High") or 1.0 A or lower (for "RF Power Low").
Ì Press the "OK" box to lock in the new data.
MAX Deviation
Ì Set the transceiver to CH 2 (band center).
Ì Inject a 1 kHz tone at –17 dBm to the MIC jack.
Ì To adjustment, click the left mouse button on the "MAX
Deviation" box, then press the [ ENTER ] key to open
the pop-up window.
Ì Use the [ ] or [ ] arrow keys so that the deviation
meter reading is ±4.2 kHz (±0.1 kHz) (for 25 kHz steps)
or ±2.1 kHz (±0.1 kHz) (for 12.5 kHz steps) deviation.
Ì Press the "OK" box to lock in the new data.
L1036 L1038
Alignment
TP1045
17