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Aprisa SR+ User Manual 1.11.1
Switching Criteria
The Protected Station will switch-over operation from the active to the standby radio if any of the
configurable alarm events occur, or if there is a loss of the ‘keep alive’ signal from the active radio.
It is possible to configure the alarm events which will trigger the switch-over. It is also possible to prevent
an alarm event triggering a switch-over through the configuration of blocking criteria.
Any of the following alarm events can be set to trigger or prevent switching from the active radio to the
standby radio (see ‘
PA current
Tx reverse power
Tx AGC
Temperature threshold
Thermal shutdown
RSSI Threshold
RX Synthesizer Not Locked
Rx CRC errors
RF no receive data
Port 1 Eth no receive data
Port 2 Eth no receive data
Port 1 Eth data receive errors
Port 2 Eth data receive errors
Port 1 Eth data transmit errors
Port 2 Eth data transmit errors
Port 3 Eth no receive data
Port 4 Eth no receive data
Port 3 Eth data receive errors
Port 4 Eth data receive errors
Port 3 Eth data transmit errors
Port 4 Eth data transmit errors
Port 1 Serial Data No RX Data
Port 2 Serial Data RX Data
Port 1 Serial Data RX Errors
Port 2 Serial Data RX Errors
USB Port Serial Data No RX Data
USB Port Serial Data RX Errors
Component failure
Calibration failure
Configuration not supported
Protection Hardware Failure
Alarm Input 1
Alarm Input 2
It will not attempt to switch-over to a standby radio which has power failure.
It will also not switch over to a standby radio with an active alarm event which has been configured as a
‘
blocking criteria
’
.
Switch-over will be initiated once either of these conditions is rectified, i.e. power is restored, or the alarm
is cleared.
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