Comtech EF Data CDM-625A, Installation And Operation Manual

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CDM-625A Advanced Satellite Modem MN-CDM625A
CDM-625A ODU (Transceiver, BUC, LNB) Operation Revision 4
10–11
10.3.3.3.1.2 ODU: BUC:PwRef

LO Freq (Local Oscillator
Frequency)
BUC-LO Frequency= 00000 MHz
Mix= High [-] (Hi,Lo) (

)
Use the ◄ ► arrow keys to select BUC-LO (Local Oscillator) Frequency for the upconversion, or
Mix to set the polarity for the upconversion mix in the BUC.
On the top line – To set the BUC- LO Frequency , use the ◄ ► arrow keys to select a digit to edit,
and then use the
▲▼
arrow keys to change that digit. The valid LO range is 3000 to 65000 MHz.
Entering a non-zero value for BUC LO causes the Tx-IF frequency menu to show LO and Satellite
frequencies ( satellite frequency = LO frequency ± modem frequency ).
Press ENTER when done.
On the bottom line – To set the Mix polarity , use the
▲▼
arrow keys to set polarity as Hi (to
indicate a high side, inverting mix) or Lo (to indicate a low side, non-inverting mix).
Press ENTER when done.
10.3.3.3.1.3 ODU: BUC:PwRef

PSUmonitor
BUC Power Supply:
0000mA, 00.0V
Use this read-only display to view the power supply current and voltage information. Press
ENTER or CLEAR to return to the previous menu.