Comtech EF Data LPOD - Manual (Page 141)

LPOD C-, X-, or Ku-Band Outdoor Amplifier / Block Up Converter (BUC) MN-LPOD
Appendix A Revision 10
A–5
since there are no waveguide switches monitored and controlled by the unit in standalone
mode.
Only the offline unit is allowed to initiate a redundant switchover by throwing the waveguide
switches. The offline unit will initiate a redundant switchover if any of the following conditions
are met:
• Online unit faulted, and offline unit is not faulted.
• Inter-unit redundant link established, and then timed out.
• Mismatched waveguide switch condition is detected.
• Unit is forced online through a remote command.
If the unit has offline mute (OFM) enabled, then the unit will mute the RF output when it is
offline. The OFM state also affects the bias tee switch position, because the bias tee switch
serves as the unit’s Rx path mute, so it is tied to the mute state (MUT) of the unit while the unit
is running in redundant mode (i.e., if MUT=1 then SBT=0, and if MUT=0 then SBT=1). If the user
tries to change the bias tee switch position while redundant mode is enabled a mode error will
result.
A.3.2.1 Applicable Serial-Based Redundancy Commands and Queries
See Chapter 5. SERIAL-BASED REMOTE PRODUCT MANAGEMENT for detailed
information about the remote commands and queries specified in this section.
The serial remote commands and queries applicable to redundancy operations are as follows:
Remote Command Meaning Functional Description
RED Redundancy Online/Offline Reports the appropriate unit’s online/offline status. Also used
to force a unit to go active (online).
ESW Enable Switch Mode Puts the unit into redundancy or standalone (manual) mode.
AFR Auto Fault Recovery
Sets the latching state of faults. Either they will latch to the
faulted state or they will recover automatically.
AOF Attenuation Offset
Individual attenuation command, used to adjust out small
differences in power levels of different amplifier.