Sea Tel 9797A-27, Инструкция по установке и эксплуатации

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9797A-27 C-Band TXRX Operation
2-1
2. Operation
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.
2.1. 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 Power switch on rear panel of the Antenna Control Unit (ACU) ON.
2.2. Antenna Initialization
A functional operation check can be made on the antenna stabilization system by observing its behavior
during the 4 phases of initialization.
Turn the pedestal power supply ON. The PCU will initialize the stabilized portion of the mass to be level with
the horizon and at a prescribed Azimuth and Elevation angles. The antenna will go through the specific
sequence of steps (listed below) to initialize the antenna. These phases initialize the level cage, elevation,
cross-level and azimuth to predetermined starting positions.
Initialization is completed in the following phases, each phase must complete properly for the antenna to
operate properly (post-initialization).
1
Level Cage is driven CCW, issuing extra steps to assure that the cage is all the way to the
mechanical stop. Then the Level cage will be driven exactly 45.0 degrees CW.
2
Elevation axis activates - Input from the LV axis of the tilt sensor is used to drive the Elevation of
the equipment frame to bring the tilt sensor LV axis to level (this results in the dish being at an
elevation angle of 45.0 degrees).
3
Cross-Level axis activates - Input from the CL axis of the tilt sensor is used to drive Cross-Level
of the equipment frame to bring the cross-level axis of the tilt sensor to level (this results in the
tilt of the Cross-Level Beam being level).
4
Azimuth axis activates - Antenna drives in azimuth until the “Home Flag” signal is produced.
This signal is produced by a Home Switch hitting a cam or by a Hall Effect sensor in close