User Manual
Reference number: 4111A-RADAR4600-GBD-R1.1
Date: 27 February 2018
Page 95 of 149
3.7.8
System and Software faults
Type of faults which may be shown red coloured at display. They are separated into different categories:
Loss of NMEA sentences
Failure of external navigation devices
Priority
Category
NMEA: no position
No position received or invalid
Warning
B
NMEA: no time/date
No or invalid time&date from EPFS
Warning
B
NMEA: no WGS84 datum
No or invalid geodetic datum received;
Positon data will be marked as invalid
Warning
B
NMEA: no heading
No or invalid heading signal received
Warning
B
NMEA: no SOG
No or invalid speed over ground received
Warning
B
NMEA: no COG
No or invalid course over ground received
Warning
B
NMEA: no STW
No or invalid speed through water received
Warning
B
NMEA: no CTW
No or invalid course through water received Warning
B
Faults of Sperry Radar
Build-In-Self-Test of Radar transceiver
Priority
Category
PM active disabling sector
blanking
Only when Performance monitor active!
Warning
B
BIST Spark detected
Magnetron arcing;
Transceiver switched to STBY
Warning
B
BIST Comm Error
Control messages are corrupted
Warning
B
BIST Radar Error
Failure in the Turning Unit and Transceiver
assembly
Warning
B
TARGET Alerts
Description
Priority
Category
AIS target table almost full
AIS TGT > 95%
Caution
B
AIS target table full
AIS TGT full
Warning
A
CPA/TCPA alarm TGT#__ID__
CPA/TCPA limit exceeded
Alarm
A
Lost target #__ID__
Target is lost
Warning
A
System faults
Failure of Radar functionality
Priority
Category
Video lost
The video level has dropped below the minimum
threshold
Warning
B
Tune dropped
Tune of frequency response has dropped below the
minimum threshold
Warning
B
Trigger lost
The trigger level has dropped below the minimum
threshold
Warning
B
ACP suspicious
The number of azimuth clock pulses per revolution
has varied form its nominal value of 4096
Warning
B
ACP lost
No azimuth clock pulse has been received (4096
pulses per revolution; on revolution is appr. 2.3
seconds)
Warning
B
ARP lost
A heading marker has not been received for at least
10 seconds (1 heading marker pulse per
revolution;one revolution is appr. 2.3 seconds)
Warning
B
Communication error
No response from transceiver
Warning
B
Tracking failure
Software modules 'Tracking' + 'Target management'
have failed. No CPA/TCPA-alarms!