User's Manual
SBS-900 Shore Based Radar Systems
Chapter 6: Local operation instructions
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 44 of 240
6.4 Local control operational states
For the purposes of the following explanations, track extractor g_[hm nb_ om_lm ]igg[h^ [h^
display system or track extractor.
System
OFF
System
configuration
' Single and three-phase AC supplies to the RDU are available.
' Breakers within RDU are OFF.
' Antenna Rotation keyswitch & Man aloft switch both set to OFF.
' Remote/ Local & standby/ RUN switches on the RDU set to Remote &
standby.
' No commands being received from the Service Display.
System status
' AC power is present within the RDU but as the breakers are in the OFF
position, the dual redundant power supply is OFF and no DC rails are
being generated.
The Radar Distribution Unit is OFF.
' Single and three-phase mains voltages are NOT sent to the transceiver /
gearbox.
System
RUN
Safety
switches
OFF
System
configuration
' Single and three-phase AC supplies to the RDU are switched ON.
' The AC Breakers within RDU are ON.
' Antenna Rotation keyswitch OR Man Aloft switch set to OFF.
' Remote/ Local & standby/ RUN switches on the RDU set to Local &
Standby.
System status
' The RDU detects that the Antenna Rotation keyswitch OR Man Aloft
switches are in the OFF position. This breaks the safety switch current loop.
' The single and three-phase relays are opened and AC power to the
transceiver/ gearbox is switched OFF.
' Antenna rotation and transmission is not possible
' The Service Display has no control over the system.
System
standby
System
configuration
' Single and three-phase AC supplies to the RDU are available.
' The AC Breakers within RDU are ON.
' Antenna Rotation keyswitch & Man Aloft switch both set to FREE.
' Remote/ Local & standby/ RUN switches on the RDU set to Local &
Standby.
System status
' The RDU is switched ON. The software reads the condition of the Antenna
Rotation keyswitch and Man Aloft switch, detects these are in the FREE
position so makes relays within the breakers sending AC power to the
transceiver/ gearbox.
' The antenna commences rotation regardless of the RUN command
State.
Note
' The SharpEye transceiver switches ON and after a 30 to 40 second warm-
up time enters a standby state waiting for a RUN command from the RDU.
' System and BITE data from both the RDU and transceiver is available.
' The system is now in standby waiting commands from the Service Display.
System
RUN
System
configuration
' Single and three-phase AC supplies to the RDU are switched ON.
' The AC Breakers within RDU are ON.
' Antenna Rotation keyswitch & Man Aloft switch both set to FREE.
' Remote/ Local & standby/ RUN switches on the RDU set to Local & RUN.
System status
' The RDU detects that the RDU switches are set to Local and RUN.
' The RUN command is sent to the transceiver which commences
transmitting.
' Radar signals, ACP, ARP and heading line data is sent to the radar I/O
module within the RDU.
Note: Antenna rotation can be over-ridden in the Control Defaults menu.