Sea Tel 4006-23 IN A 60" RADOME Installation And Operation Manual Download

Page: 12 / 87

4006-23 Broadband At Sea

Operation

2-2

2.5.

Tracking Operation

Tracking optimizes the antenna pointing, in very fine step increments, to maximize the level of the
satellite signal being received. The mode of tracking used in this antenna is a variation of Conical
Scanning called DishScan. Tracking is controlled by the ACU. You can toggle Tracking ON/OFF from the
ACU.
DishScan continuously drives the antenna in a very small circular pattern at 60 RPM. The ACU evaluates
the received signal throughout each rotation to determine where the strongest signal level is (Up, Right,
Down or Left) and then issues the appropriate Azimuth and/or Elevation steps to move the antenna
toward where stronger signal is.
The pedestal cannot control tracking. Refer to the ACU manual for more Tracking information.

2.6.

Antenna Polarization Operation

Linear feeds are equipped with a polarization motor and potentiometer feedback and are controlled from
the Antenna Control Unit. Circular feeds do NOT require polarization adjustment.
Auto-Polarization mode is the default polarization mode of operation from the ACU. Polarization may be
operated manually from the ACU. Refer to the Antenna Control Unit manual for more operation
information.

2.7.

Low Noise Block Converter Operation

There are no operating instructions or controls applicable to the LNB. This unit is energized whenever
the matrix switch and satellite receiver(s) have AC power connected to them.
Satellite signals are linear polarized (fixed plane down from the satellite) and, therefore, the pedestal will
only receive linear polarized signals when a linear LNB is installed.

2.8.

RF Equipment

The RF Equipment is not operated or controlled by the antenna pedestal or Antenna Control Unit. Refer
to the vendor supplied manuals for the RF Equipment provided with your system.

2.9.

FCC TX Mute Function

FCC TX Mute function provides a transmit inhibit, or mute, signal to the Satellite Modem to disable
transmit whenever the antenna is blocked, searching, targeting or is mispointed 0.5 degrees from peak
satellite position. This function is provided by software in the ACU & PCU, hardware wiring connection
between the ACU and the Satellite Modem and proper setup of the ACU SYSTEM TYPE parameter.
After the function has been installed and setup correctly the FCC TX Mute function operation is
automatic, therefore, requires no operator intervention. Refer to the Installation and Setup chapters in
this manual and in your Antenna Control Unit manual.

2.10.

Radome Assembly Operation

When operating the system it is necessary that the radome access hatch (and/or side door) be closed
and secured in place at all times. This prevents rain, salt water and wind from entering the radome.
Water and excessive condensation promote rust & corrosion of the antenna pedestal. Wind gusts will
disturb the antenna pointing.
There are no other operating instructions applicable to the radome assembly by itself.