Sea Tel 9711-92, Installation And Operation Manual

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9711-92 Ku-Band TXRX Antenna Specific Operation
15-1
15. Antenna Specific Operation
This antenna requires special operating instructions that are not included in the Antenna Control Unit manual. Please refer to
the information below.
The information below reflects normal operation of the antenna from the antenna control unit. It assumes that:
The antenna has been properly installed
Home Flag Offset, targeting trims & polarization have been optimized
Blockage zone(s) have been entered if necessary
The ACU is following the gyro compass correctly
The system is, in all respects, operating normally.
Simply selecting the desired band/reflector does not change the position of the pedestal, as it will stay where was previously
pointed until you target the desired satellite (whether it is the same satellite or a different one).
When switching bands/reflectors, you will need to select the correct reflector (in the ANTENNA menu), select the correct band
(in the TRACKING Menu) and change the tracking receiver settings (in the SAT Menu) to appropriate values for the satellite you
wish to target and then target the selected reflector to the desired satellite.
WARNING:
RF Radiation Hazard - This stabilized antenna system is designed to be used with
transmit/receive equipment manufactured by others. Refer to the documentation supplied by the
manufacturer which will describe potential hazards, including exposure to RF radiation, associated
with the improper use of the transmit/receive equipment. Note that the transmit/receive
equipment will operate independently of the stabilized antenna system.
The ultimate responsibility for safety rests with the facility operator and the individuals
who work on the system.
WARNING: RF Radiation Hazard - When the transmit/receive system is in operation, no one
should be allowed anywhere within the radiated beam being emitted from the reflector.
The ultimate responsibility for safety rests with the facility operator and the individuals
who work on the system.
15.1. System Power-up
Turn the Power switch on the louvered panel of the antenna pedestal ON. This will energize the antenna pedestal and
the associated RF equipment.
Turn the Antenna Control Unit (ACU) Power switch ON
15.2. Antenna Initialization
Turn the pedestal power supply ON. The brakes on the Elevation and Cross-Level motors will release. A brake release
power supply control circuit supplies 24 VDC to the brakes initially (5-10 seconds) and then reduces the voltage to
12VDC. The PCU will initialize the stabilized portion of the mass to be level with the horizon and at a prescribed
Azimuth and Elevation angles in the specific sequence of steps listed below.
Initialization is completed in the following phases, each phase must complete properly for the antenna to operate
properly (post-initialization). Observe the Initialization of the antenna pedestal.
Step 1. Elevation and Cross-Level axes activate simultaneously - Input from the Elevation sensor is used to
drive the Elevation of the equipment frame to 45.0 degrees in elevation. Input from the Cross-Level sensor is
used to drive Cross-Level of the equipment frame to bring it to level (this results in the tilt of the Cross-Level
Beam being level).
Step 2. Azimuth axis activates - Antenna drives CW in azimuth until the “Home Flag” signal is produced. This
signal is produced by a Proximity sensor in close proximity to a metal tab. After a short period of time (a total
of approximately 1-2 Minutes after power is initially applied to the antenna), the PCU will report its model
setting and software version number to the Antenna Control Unit (ACU).
This completes the phases of initialization. At this time the antenna elevation should 45.0 degrees and Relative
azimuth should be at home flag (home switch actuated).