Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

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CDM-425 Advanced Satellite Modem
Revision 0
ODU (Transceiver, BUC, LNB) Operation 10–7 MN-CDM-425
10.3.3.1.2.1 CONFIG: Mask

BUC
BUC alarm = Active (Active,Mask)
Attach to Tx alarm = No (Yes,No)(

)
When using L-Band, a Block Up Converter (BUC) may be included in the system. A ‘smart’ BUC
may be monitored and/or controlled via the modem via FSK (
F requency- S hift K eying control).
For a modem in a 1:1 redundancy setup, the fault indications must be
customized for the physical setup:
1. Two modems, two LNBs in parallel – If a fault occurs on the active
modem/BUC pair and switchover is desired, the BUC mask should be
configured as Attach to Tx alarm = Yes.
2. The more common redundancy setup is Two modems in parallel, one
BUC – If a fault occurs on the active modem, switchover is desired. But,
if a fault occurs on the BUC yet a switchover of modems does not fix the
problem, then switchover should not occur and the BUC mask should be
configured as Attach to Tx alarm = No.
If the system has no redundancy and was attached to an external audio alarm,
Attach to Tx alarm = Yes would indicate that a BUC fault has occurred, as the
fault would be included in the FORM C alarms.
Use the
▲▼ arrow keys to select
BUC Alarm or Attach to Tx alarm .
•
For BUC Alarm , use the
▲▼ arrow keys to select
Active or Masked .
•
For Attach to Tx alarm , use the
▲▼ arrow keys to select
Yes or No .
Press ENTER when done.