Rohde & Schwarz 6144.7800.02, Operating Manual

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R&S EU4200C Main/Standby Operation (1:1) in Analog and VoIP Mode
6174.8456.02-01 3.78
3.6.5 Limitations/Notes
Please note that there are certain limitations for the main/standby operation:
 Main and Standby radio configuration with NoGo state on radios wired
as 1:1 M/S pair must be avoided
In case of the NoGo state on both radios, both TEST_OC lines
become open (both radios are reporting a request for M/S switchover).
This state brings the radios to ACTIVE state when they can receive
and transmit simultaneously. This can be dangerous especially for
transmitters
.
Example of an incorrect radio configuration:
– HW Configuration: Main and Standby radios are supplied from the
same mains. Both radios are connected to a DC backup battery
– CBIT Configuration: AC-Main Supervision is configured as "NoGo"
on both Main and Stadby radios. If the AC main fails, the radios will
request the M/S switchover and switch to the unwanted ACTIVE state
Note:
If one radio is in local mode while the other one is in remote mode,
then the locally operated radio is active and the second one is inactive. This
setting remains even when the local mode is left. The main/standby switch-
over capability of the radio pair is now available.
Note:
The “Inacitive Warning” parameter should be set to “Disable” to avoid
the inactive "Standby" radio shows the CBIT event “INACTIVE WARNING”.
Note:
Set the “Line Interface in Local Mode” parameter to “Enabled”. Radio
in local mode will switch from state INACTIVE to state ACTIVE but does not
close VoIP sessions.
Note:
Make sure that all operational parameters are equal on both radios
(with exception of IP address).