Comtech EF Data CDM-625A Installation And Operation Manual page 476

CDM-625A Advanced Satellite Modem
CDM-625A ODU (Transceiver, BUC, LNB) Operation
10.3.3.1 (SELECT: CONFIGURATION) Menu Branches
CONFIG:
CnC
Use the ◄ ► arrow keys to select Tx, Rx, or Mask, and then press ENTER.
10.3.3.1.1 CONFIG: Tx  Freq and CONFIG: Rx  Freq Submenus
Tx-IF Frequency:
(LO:12500 MHz
Rx-IF Frequency:
(LO:12500 MHz
When you use the ODU menus to configure a BUC or LNB LO-frequency, the CONFIG: Tx→Freq
and CONFIG: Rx→Freq menu screens provide supplemental information on the bottom line. As
you edit the IF frequency, the Satellite frequency updates accordingly.
Satellite frequency = LO ± IF frequency
by the LO mix setting:
•
High-sided mix [–] (includes a spectral inversion);
• Low-sided mix [+].
To edit the Tx-IF or Rx Frequency, use the
the arrow keys to change that digit. The available ranges are 50-180 MHz, and 950-2000
▲▼
MHz (L-Band) (FAST option). The resolution is 100Hz. Press ENTER when done.
10.3.3.1.2 (SELECT: CONFIGURATION) Mask Submenus
The Mask submenus allow you to selectively mask (ignore) or make active various alarms and
traffic conditions that are monitored by the modem.
Alarm Masks: AIS Buffer Ref RxIF TxClk
TxSat RxSat Terr ROp BUC LNB CEX
Use the ◄ ► arrow keys to select BUC or LNB, and then press ENTER.
All Mode
EDMAC Misc Mask
Sat:14250.0000 MHz) ()
Sat:13700.0000 MHz) ()
Tx Rx Clocks D&I/ACM
Remote IP
1750.0000 MHz
1200.0000 MHz
, where the ± sign is determined
◄ ► arrow keys to select a digit to edit, and then use
10–6
MN-CDM625A
Revision 4
()
()