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 26 of 240
5.9 Advanced antenna sub system
The advanced antenna solution comprises an X-band antenna and Antenna Turning Unit (ATU) that
can be used on with the SBS-900-1, SBS-900-2 and SBS-900-3 X-band systems.
Antenna: The advanced antenna sub system
comprises of a HI-gain 5.5 or 6.4m antenna
The antenna is rotated using a servo motor
at 1 RPM but can be configured during
setting to work only for speeds between 1
and 10 RPM.
Example of a 6.4m advanced antenna
The waveguide feed from the antenna is connected to the rotating joint of the Antenna
Turning Unit.
Antenna range Description
SBS-A55-10HW
10 RPM
5.5 m, Horizontal polarisation, white
SBS-A55-10CW 5.5 m, Circular polarisation, white
SBS-A64-10HW 6.4 m, Horizontal polarisation, white
SBS-A64-10CW 6.4 m, Circular polarisation, white
SBS-A55-20HW
20 RPM
5.5 m, Horizontal polarisation, white
SBS-A55-20CW 5.5 m, Circular polarisation, white
SBS-A64-20HW 6.4 m, Horizontal polarisation, white
SBS-A64-20CW 6.4 m, Circular polarisation, white
Note: White is according RAL 9016. For grey variants (RAL 7001) the above Kelvin Hughes part numbers
have suffix G instead of W.
Gearbox: Two Antenna Turning Units are available:
- ST1-F10 (10 RPM)
- ST1-F20 (20RPM)
Both are powered by a three-phase supply generated and controlled by a static inverter
mounted 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 within the Antenna Turning
Unit. The gearbox is fitted with an encoder giving 1024 @BOm [h^ 0 @QO [h^ m_lpi ginil-
A +5VDC supply from the transceiver enclosure powers the ACP/ ARP encoder within the
gearbox. ACP and ARP signals are connected to the transceiver enclosure by cables.
Handbook: The installation, termination, commissioning processes and requirements for the
advanced range of antennas and the ST1-F10 & ST1-F20 Antenna Turning Unit (ATU) are
not included in this section.
Note
Please refer to Annex B or to the handbooks provided with the equipment for full
installation details.
Note: Antenna speeds/ RPM are factory configured.