User's Manual

SBS-900 Shore Based Radar Systems
Chapter 10: Corrective maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 163 of 240
10.7.9 SharpEyen error messages
If a fault condition is detected within the SharpEye
TM
transceiver, a fault message is sent to the Radar
Distribution Unit and in certain conditions the unit switches to a degraded low power state of
operation.
The following is a list of possible alarm conditions that can occur within the SharpEye transceiver.
SharpEye
TM
error Message
Description
Rx sensitivity
If the minimum detectable signal rises above a pre-set level the transceiver
sends a receiver sensitivity warning message.
VSWR
If the VSWR on the RF output is worse than 1.4:1 the transceiver sends an
antenna VSWR warning message and switches to the degraded fiq jiq_l
state of operation.
If the VSWR on the RF output is worse than 2.0:1 the transceiver enters fault
mode and is shutdown.
SYNTH
The synthesiser has not initialised correctly; cycling the power may clear this
condition (emergency stop).
Tx power
If the RF output power falls below 100W the transceiver sends an RF Power
LOW warning message and switches to the degraded fiq jiq_l state of
operation.
Over temperature
If the temperature of the RF power transistors in the transceiver exceeds a
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Radar Distribution Unit and switches to the degraded fiq jiq_l state.
If the temperature exceeds a further pre-set limit the transceiver switches to
the fault state and transmission is stopped.
As the temperature returns to within the predetermined limits, the transceiver
returns to the degraded state and then to normal transmit operation.
Turning info lost
If the antenna stops rotating when not commanded to stop, a warning
message is sent to the display equipment and the transceiver switches to the
fault state and transmission is stopped.
ARP/HL not
detected
If an azimuth or heading line pulse is not detected, a message is sent to the
transceiver and for safety reasons transmission is stopped within 60 seconds.
Azimuth status
(1)
Antenna rotation is checked for clockwise rotation (viewed from above). If anti-
clockwise rotation is detected, a message is sent and transmission is stopped
within 60 seconds.
Azimuth status
(2)
If missing pulses between heading lines are detected, a message is sent and
transmission is stopped within 60 seconds.