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HPOD C-/Ku-Band Outdoor Power Amplifier
Redundancy
B.3 1:2 M
ODE
In 1:2 redundancy mode, there is a dedicated backup unit (determined by the cable
position). In this configuration the backup unit is responsible for monitoring the two
online units for communications and summary faults. While the backup unit is
constantly monitoring both units for their status, if either has a fault, the last (good)
status is used as the configuration for the backup unit before the backup unit goes online.
Once the backup unit goes online, the redundancy auto/manual status reverts to manual
mode, and the backup unit stays online until reset by the user. The user may reset the
system by issuing a FBU=0 command to place the units back into auto mode. When this
command is issued, the backup unit will then switch back to the "normal" configuration
of units 1 and 2 online. The system can be operated manually by sending an
FBU=1(forces SSPA 1 to be backed up), or a FBU=2 (forces SSPA 2 to be backed up)
command to the BU unit.
The backup unit also stores an offset value for each of the 2 online units to be used
when the backup unit replaces an active unit. This offset may be set with the SBO=
command.
For additional information, refer to Appendix C 1:1 HPOD Series Redundancy Test.
B–2
Revision 2
MN/HPOD.IOM
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