Vertex Standard LTR VX-2200 Service Manual page 23

10. Modulation Balance
Note: The "TX VCO Tune Voltage" must be done before this alignment is started.
Connect the AF Signal Genarator to pin 1 of Accessory
Connector on the rear panel, then set the output of the
AF Signal Genarator to 30 mVpp with 100 Hz tone.
Set the transceiver to CH1 (band center, wide devia-
tion) via the "Channel" box on the "Alignment" win-
dow.
Click the left mouse button on the "Modulation Bal-
ance" button.
Click the left mouse button on the "Start" button.
Move the Slide Bar, as needed as, until the modula-
tion wave gets a waveform as follows.
OK
Press the "OK" button on the window, the value of the
alignment for Modulation Balance (Wide Deviation)
will be saved in the radio.
NG NG
Set the transceiver to CH 2 (band center, narrow de-
viation) via the "Channel" box on the "Alignment"
window.
Click the left mouse button on the "Start" button.
Move the Slide Bar, as needed as, until the modula-
tion wave gets a waveform as follows.
OK
Press the "OK" button on the window, the value of the
alignment for Modulation Balance (Narrow Deviation)
will be saved in the radio.
Alignment
NG NG
G-11