CDM-425 Advanced Satellite Modem
Revision 0
ODU (Transceiver, BUC, LNB) Operation
10–8
MN-CDM-425
10.3.3.1.2.2 CONFIG: Mask
LNB
LNB alarm = Active (Active,Mask)
Attach to Rx alarm = No (Yes,No)(
)
When using L-Band, a Low-Noise Block Down Converter (LNB) may be included in the system. It
cannot be monitored and/or controlled by the modem, except for the power supply values.
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/LNB pair and switchover is desired, the LNB mask should be
configured as Attach to Rx alarm = Yes.
2. The more common redundancy setup is Two modems in parallel, one
LNB – If a fault occurs on the active modem, switchover is desired. But, if
a fault occurs on the LNB, a switchover of modems might or might not fix
the problem. If switchover should take place, the LNB mask should
configured as Attach to Rx alarm = Yes.
If the system has no redundancy and was attached to an external audio alarm,
Attach to Rx alarm = Yes would indicate that a LNB fault has occurred, as the
fault would be included in the FORM C alarms.
Use the
◄ ►
arrow keys to select
LNB Alarm
or
Attach to Rx alarm
.
•
For
LNB Alarm
, use the
▲▼ arrow keys to select
Active
or
Masked
.
•
For
Attach to Rx alarm
, use the
▲▼ arrow keys to select
Yes
or
No
.
Press
ENTER
when done.
Содержание CDM-425
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Страница 72: ...CDM 425 Advanced Satellite Modem Revision 0 Installation 2 8 MN CDM 425 BLANK PAGE...
Страница 118: ...CDM 425 Advanced Satellite Modem Revision 0 FAST Activation Procedure 5 6 MN CDM 425 Notes...
Страница 194: ...CDM 425 Advanced Satellite Modem Revision 0 Front Panel Operation 6 76 MN CDM 425 Figure 6 3 Loopback Modes...
Страница 390: ...CDM 425 Advanced Satellite Modem Revision 0 Serial Remote Control 8 66 MN CDM 425 BLANK PAGE...
Страница 558: ...CDM 425 Advanced Satellite Modem Revision 0 ODU Transceiver BUC LNB Operation 10 68 MN CDM 425 Notes...
Страница 574: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix B B 12 MN CDM 425 BLANK PAGE...
Страница 575: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix B B 13 MN CDM 425 Figure B 8 VersaFEC 2 Short Block...
Страница 576: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix B B 14 MN CDM 425 Figure B 9 VersaFEC 2 Short Block...
Страница 587: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix E E 3 MN CDM 425 Figure E 1 TX Clock Modes...
Страница 589: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix E E 5 MN CDM 425 Figure E 2 RX Clock Modes...
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Страница 607: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix F F 5 MN CDM 425 Figure F 2 Conventional FDMA Link...
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Страница 685: ...CDM 425 Advanced Satellite Modem Revision 0 Appendix K K 5 MN CDM 425 Figure K 1 ACM over Satellite Generic Example...
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Страница 744: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...