Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Radar/Chart Radar User Guide Radar
65900010 11-9
Transceiver Alerts
Trigger Error
A trigger error alert is raised when the transceiver is in transmit and there
are fewer valid triggers than expected.
Azimuth Error
An azimuth error alert is raised when the transceiver is in transmit and
either:

the number of azimuth pulses between heading markers is greater
or less than a margin of error of 5 pulses centred on a nominal
value of 4096 pulses. Or;

the number of pulses per revolution is within the margin of error,
but a small error persists for a period of time (e.g. 4095 pulses per
rev are received continually). This will cause a picture clear.
Heading Marker Error
When the transceiver is in transmit an error alert is raised if a heading
marker has not been received for more than 10 seconds. If a heading
marker has not been received for more than 30 seconds the Master Display
automatically switches the connected transceiver to standby.
Pulse Length Error
An error alert is raised if, after a delay no greater than 4 seconds, the
display’s requested pulse length does not match the pulse length of its
connected transceiver.
Standby/Transmit Error
A Standby/Transmit error alert is raised if the state of the transceiver is
different to that requested by the display.
Transceiver BITE
A Transceiver BITE alert is raised when there are failed BITE parameters.
If the spark gap parameter fails, the Master display automatically switches
the connected transceiver to Standby. This indicates a fault in the
Transceiver which will require contacting your supplier or local dealer.
AFC Mode Error
An AFC Mode error alert is raised if the AFC mode of the transceiver does
not match that of the displays.