User's Manual

30 kW S-BAND/U ANTENNA GROUP
DESCRIPTION AND MAIN CHARACTERISTICS
1.4 Rev. C
1 .2 .3 Antenna Pe dest al S/ U
The Pedestal, which supports the 12’ S-Band Antenna, can assume the
configurations:
- 03R-039: equipped with a three-phase electrical motor and
an optical sensor for the Antenna position detection
1 .2 .3 .1 0 3 R- 0 3 9 Pede st al
The Pedestal (Chapter 9, Figure 9.1.4), consists mainly of:
- The Motor Group (pos. 1) - The Motor Group function is to
provide the necessary power generate to the antenna
rotation
- The Rotating Flange (pos. 2) - The Rotating Flange’s
function is to transfer to the antenna the motion provided by
the Driving Belt. Flange the 12’ antenna is mounted on the
Rotating; the antenna is fixed to the Rotating Flange by
means of studs and nuts (pos. 3 and 4)
- The S Band Rotating Joint (pos. 5) - The joint is rotating with
the antenna, and the lower part, called Cable with Connector
Assy, is fixed to the Pedestal structure through a proper bar.
The fixed part is connected with the cable from the
TRANSCEIVER which enters the Pedestal through a flange.
When the Pedestal is not connected, the hole is closed with
a cover provided with a gasket (pos. 8)
By loosing and removing four nuts (Chapter 9, Figure 9.1.4 pos. 7) it is possible
to remove the cover (Chapter 9, Figure 9.1.4 pos. 8) and to access to the inside
of the pedestal.
By referring to Chapter 9, Figure 9.1.5, the following components can be
localised in the pedestal:
- The Gear Reduction Group (pos. 1) - The Gear Reduction
Group’s function is to reduce the motor angular velocity
- The Driving Belt (pos. 2) - The Driving Belt function is to
transmit the motion provided by the Gear Reduction Group to
the antenna. As result, the antenna angular speed is greater
than 20 rpm for 50 Hz and for 60 Hz
- The Indicator Unit (pos. 3) - The Indicator Unit function is to
generate the Heading Line (HL) pulse and the pulses
indicating the antenna position (AZ)
- The Antisign Board (pos. 4) - The Board receives the pulses
from the Indicator Unit and sends them to the
TRANSCEIVER
- The Cable for the Signal - The Cable function is to connect
the antenna to the Transceiver equipment. The upper part of
the cable is the Rotating Joint (Chapter 9, Figure 9.1.4 pos.