1:1 Redundant System Setup (Using A Single Ethernet Interface - Comtech EF Data LPOD Installation And Operation Manual

LPOD Outdoor Amplifier / Block Up Converter (BUC)
Appendix A
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:
1. Online unit faulted, and offline unit is not faulted.
2. Inter-unit redundant link established, and then timed out.
3. Mismatched waveguide switch condition is detected.
4. 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.3.1

1:1 Redundant System Setup (Using a Single Ethernet Interface)

See Chapter 5. SERIAL-BASED REMOTE PRODUCT MANAGEMENT for detailed
information about the remote commands and queries specified in this section.
Follow these steps to set up a 1:1 Redundancy System using a single Ethernet interface:
Step Description
1
Turn both units off, and then connect them to the redundant system hardware using the proper cables.
2 Turn on Unit #2, and change its serial remote address from 1 (factory default) to a valid unique value (typically 2)
so that it does not conflict with any other unit in the system.
3
Change Unit #2's IP address from the factory default (192.168.1.4/24) to a valid unique value (typically
192.168.1.3/24) so that it does not conflict with any other unit in the system.
4 Enable redundant mode by setting the ESW command (typically ESW=1 or ESW=2). The waveguide switch /
switches throw may be heard when redundant mode is enabled. Unit #2 is now the online unit.
5 Turn on Unit #1.
6
Change Unit #1's serial remote address / IP address if necessary (typically the factory default values are correct).
7 Enable redundant mode by setting the ESW command (typically ESW=1 or ESW=2). The waveguide switch /
switches throw may be heard when redundant mode is enabled. Unit #1 is now the online unit.
8 Set up all parameters for Unit #1 so that the configuration can be copied to Unit #2 (AMP, MUT, ATT, etc.).
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