User manual

Table Of Contents
Section 5: Module Configuration 5-13
Moseley SL9003Q 602-12016 Revision G
CONFIGURE
QAM Radio Launch
TX
Freq
QAM Radio TX Config
MHz944.5000
2. Using the cursors, change to the desired frequency. Press ENTER. The unit
should continue to indicate AFC LOCk (green) on the front-panel.
3. The transmitter synthesizer AFC voltage will change depending on the frequency
programmed from the front panel. This voltage will typically be between 0.5 Vdc
to 8.5 Vdc for the 944 MHz to 952 MHz band. Navigate the LCD screens to
monitor the AFC voltage as follows:
STATUS
QAM Radio Launch
TX
AFC
VDC
TX
%LO
Xctr %50
50
4.5
Note: Earlier generations of the SL9003Q required an internal adjustment on the
Transmit Module to center the AFC voltage. These units can be identified by a changing
of the frequency by 5 MHz will cause the TX AFC to loose lock. With these units the
Transmit Module was placed on an extender card to access the TX AFC adjustment.
Depending on the “direction” that the frequency was moved, the voltage might read
either 0.00 or 9.99 VDC. While monitoring this voltage, the user would adjust the TX
AFC on the Transmit Module (using a very small flat blade screwdriver) until the voltage
read 4.5 +/- .25 VDC.