Service manual

21VX-450 Series VHF Band Service Manual
Alignment
1. VCO (RX VCO/TX VCO) - Normally there is no need to adjust this parameter -
This parameter is to align the VCO Voltage adjustment.
2. PLL REFERENCE FREQUENCY
(
FREQUENCY
)
This parameter is to align the reference frequency for PLL.
1. Press the “Frequency” button to start the align-
ment.
The Frequency Alignment window will appear.
2. Click the “PTT” button or press the “SPACE” bar,
and the radio will start to transmit on the center
frequency channel.
3. Set the value to get the desired frequency by drag-
ging the slide bar, clicking the up-down button,
pressing the left or right arrow key, or entering
the value in the entry box.
4. After getting the desired frequency click the
“PTT” button or press the “SPACE” bar to stop
transmitting.
5. Click the “OK” button to finish the frequency
alignment and save the data.
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