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
10–6
10.3.3.1 (SELECT: CONFIGURATION) Menu Branches
CONFIG: All Mode Tx Rx Clocks D&I/ACM
CnC EDMAC Misc Mask Remote IP (

)
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: 1750.0000 MHz
(LO:12500 MHz Sat:14250.0000 MHz) (

)
Rx-IF Frequency: 1200.0000 MHz
(LO:12500 MHz Sat:13700.0000 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 , where the ± sign is determined
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
◄ ►
arrow keys to select a digit to edit, and then use
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 .