SW Version 2.04 30-January-2009 Page 68 of 128
Only enough information to uniquely identify a single set of service information is
required. If there is insufficient filtering information specified, the transmitted RDS
data will contain all unfiltered information. The effects of this on a receiver are
unspecified.
As a precaution we recommend that the RDS data transmission should be verified by
a test receiver if a complete filter specification is unavailable.
4.6.4 FM Radio Module-Controlled Input Handling Redundancy
Overview
FM radio module-controlled input handling redundancy refers to the process by which
the FM radio module can receive configuration from two different MMI boards, but not
at the same time.
The chassis will have two switches. One switch will be configured as the main switch
while the other switch will be configured to be the redundant switch.
There will be two FM radio modules, one for each switch. It must be noted that FM
radio module redundancy configuration is currently only supported for IP input
modules.
Hardware requirements
The following hardware is required for the implementation of FM radio module-
controlled input handling redundancy:
2 IP input modules The unit must be equipped with at least two IP input
modules
2 Switches
FM radio cards For FM radio module-controlled input handling redundancy
to be implemented, switching configuration must be known
at set up. Therefore both IP input cards must have MMIs
(though one will be redundant). It should be noted that
both IP input modules do not need to have the same
configuration.
Alarms that cause switching:
FM radio module-controlled input handling redundancy will be implemented with the
following alarms:
No Data Input An alarm that originates from the FM radio module when
no selected services are received.
No Contact with MMI
Board
The FM radio card periodically polls the MMI card. If a
certain number of polls fail contact with the MMI is
assumed lost.
Alarms displayed as a result of the switch
Switch reason:
operator
This alarm refers to the operator having performed a
manual switch
Switch reason: no This alarm refers to loss of contact with the MMI board
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