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 226 of 240
RDU LCD
Message
System status Description
Tx power
Message received from SharpEye
TM
processor.
The transceiver will switch to Low
power mode (see below).
If the RF output power falls below 100W the
transceiver sends an RF Power LOW warning
g_mm[a_ [h^ mqcn]b_m ni nb_ ^_al[^_^ fiq jiq_l
state of operation.
Turning info lost
Message received from SharpEye
TM
processor.
Antenna rotation and system
transmission will have stopped.
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 (see below) and transmission is stopped.
VSWR
Message received from
SharpEye
TM
processor.
The transceiver will switch to Low
Power or Fault mode.
If the VSWR on the RF output is worse than 1.4:1
the transceiver sends an antenna VSWR warning
g_mm[a_ [h^ mqcn]b_m ni nb_ ^_al[^_^ fiq jiq_l
state of operation (see below).
If the VSWR on the RF output is worse than 2.0:1
the transceiver enters fault mode (see below) and
is shutdown.
This can be an indication of a problem with the
SharpEye
TM
processor, the connecting waveguide
or the antenna.
SharpEye
TM
modes
In some of the alarm conditions noted above, the SharpEye
TM
transceiver may enter one of the three
following states.
If any of these states is detected attempt a system reset. Should the fault condition persist please
contact Kelvin Hughes for further assistance.
Transceiver low
power mode
The transceiver continuously runs background performance checks on forward power,
reverse power, receiver sensitivity and temperature. If any of these parameters falls
outside predetermined levels a warning message is sent to the Radar Distribution Unit
indicating the nature of the fault.
The transceiver continues to operate, but with reduced performance and functionality.
Caution: As a result of reduced output power, range performance will be reduced and
the system may not meet the expected operational detection performance.
Transceiver fault
mode
If the performance or functionality is degraded such that the transceiver cannot operate
it enters the fault state and a fault message is sent to the display equipment.
The transceiver stops radiating RF and there is no video output to the Radar
Distribution Unit.
A spurious fault may be cleared by re-powering the equipment.
RDU to transceiver
communication
error
If communication is lost between the Radar Distribution Unit and the SharpEye
TM
, the
RDU reboots the SharpEye leading to a potential 60 second gap in coverage.