Comtech EF Data CDM-740 - Manual (Page 80)

CDM-740 Advanced Satellite Modem Revision 0
Front Panel Operation MN-CDM740
5–28
5.9.1.1 ODU: (BUC:) Power
BUC Power Enable: Off
Output Power Enable: Off ( ◄►
vE)
Select the power parameter to edit using the ◄ ► arrow keys, then use the ▲ ▼ arrow keys to edit
the setting as Off or On. Press ENTER when done.
5.9.1.2 ODU: (BUC:) 10M-Ref
BUC 10 MHz Reference: Off On
( ◄► E)
Select the 10MHz Reference as Off or On using the ◄ ► arrow keys, then press ENTER.
Note: A BUC will not transmit without a 10MHz Reference.
5.9.1.3 ODU: (BUC) Alarm
Alarm Limit Low: 0000 mA
Alarm Limit High: 4000 mA
To set the Low and High Alarm Limits between 0 and 4000 mA, in 100mA increments, use the
◄ ► arrow keys to select the digit to be edited, then use the
▲ ▼ arrow keys to set the value of
that digit. Press ENTER when done. The default values (mA) are (low) #### and (high) #### .
5.9.1.4 ODU: (BUC) Monitor
BUC Power Monitor:
0000 mA, 00.1 V
This read-only display provides the BUC power supply current and voltage information. Press
ENTER or CLEAR to return to the previous menu.
5.9.1.5 ODU: (LNB) LNB_LO
LNB_LO: 00000.000 MHz
Terminal Mix: [+] RTF: +1950.0000
On the top line, the user may enter the LNB LO frequency for the down conversion. Entering a non-
zero value for LNB LO will cause the Rx-IF frequency menu to show LO and Satellite frequencies.
Edit the LNB LO frequency by using the ◄ ► arrow keys to select the digit to be edited, then use
the
▲ ▼ arrow keys to set the value of that digit. The valid LO range is 3000 to 65000 MHz.
On the bottom line, the Terminal Mix sets the polarity for the downconversion mix in the LNB:
• [+] indicates a high side, inverting mix;