User's Manual

SBS-900 Shore Based Radar Systems
Chapter 5: Technical overview
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 25 of 240
5.8 Standard antenna sub system
The standard antenna solution comprises a Kelvin Hughes manufactured gearbox and range of Low
Profile Antennas (LPA) that can be used on all variants of the SBS-900 range:
Antenna: The gearbox can be fitted with a range of X
or S-band Low Profile Antennas (LPA).
The antenna utilises polyrod technology
and a horizontally polarised end fed slotted
array enclosed in a polycarbonate plastic
case.
Example of a Kelvin Hughes X-band LPA
Single antenna: The waveguide feed from the antenna is connected to the rotating joint of
the gearbox.
Combined X & S band antenna: The waveguide from each antenna is connected to a
special dual waveguide connection at the rotating joint of the gearbox.
SBS system
Equipment colour
Signal white RAL9003 Silver grey RAL7001
X-band
SBS-900-1
SBS-900-2
SBS-900-3
LPA-A37 (3.7m)
or
LPA-A55 (5.5m)
LPA-A37-BAAA (3.7m)
or
LPA-A55-BAAA (5.5m)
S-band
SBS-900-51 LPA-A3 (3.9m) LPA-A3-BAAA (3.9m)
Combined
X & S-band
SBS-900-4
LPA-A455
(5.5m & 3.9m)
LPA-A455-BAAA
(5.5m & 3.9m)
Gearbox: The synchronous antenna motor is driven by a 3-phase voltage
which is supplied and controlled from an inverter within the RDU.
This inverter is configured to provide a soft start and a soft stop for
the Motor and adjustable antenna RPM.
Note
Three phase power is
connected via a junction box mounted on the motor.
A DC supply from the transceiver enclosure powers the ACP/ ARP
encoder within the gearbox enclosure. ACP and ARP signals are
connected to the transceiver enclosure by cables.
The gearbox has a removable service access door that allows easy access to the ACP/
ARP connections, the encoder and the RF coupling in S-and systems. There are no other
electronics within the unit.
SBS system
Equipment colour
Signal white RAL9003
Silver grey RAL7001
X-band
SBS-900-1
SBS-900-2
SBS-900-3
DTX-A3-AXZX DTX-A3-BXZX
S-band SBS-900-51 GTX-A11 GTX-A11-BAAA
Combined
X & S-band
SBS-900-4 DTX-A19 DTX-A19-BAAA
Specifications:Full specifications on the standard antenna and gearbox range can be found in the
installation and commissioning handbook (KH-1602-1).
Note: Antenna speeds/ RPM are factory configured.