Vertex Standard EVX-531 Service Manual page 17

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odulation alanCe
This parameter is to align the "Modulation Balance" (Wide/Narrow).
1. Press the "Mod Bal" button to open the "Modulation Balance
Alignment" window.
2. Confirm the modulation frequency which is indicated in the
"Freq" box located at the bottom left of the screen is "50 (Hz)".
If not, enter the value (50) in the "Freq" box from the comput-
er's keyboard.
3. Click the "PTT" button on the desired channel. The radio starts
to transmit on the selected channel.
4. Write down a deviation level, then enter the "4000 (Hz)" of the
modulation frequency to the "Freq" box.
5. Set the value to get the same deviation level that wrote down
according to the following ways:
l Dragging the slide bar
l Clicking the arrow buttons
l Pressing the left/right arrow key of the computer's keyboard
l Entering the value ("0" - "3FF") in the "Current Data" box
from the computer's keyboard
6. Click the "PTT" button or press the "SPACE" bar to stop trans-
mitting.
7. Click the "OK" button to finish the Modulation Balance align-
ment and save the data.
1) You may align the modulation balance by any frequency pair
by changing the value of the "Freq" box located at the bottom
left of the screen, if needed.
2) You may select the alignment type from the "Radio" button
(ADJ Type) located at the bottom of the screen, as needed.
Basic: "Low-edge / band center / high-edge" and select the
channel for alignment (Default).
Single:
Alignment value changes only on the selected chan-
nel.
All Freq: Alignment value changes on all channels.
EVX-531 VHF Service Manual
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