Sea Tel 9711 C, Installation And Operation Manual

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Setup – Ship’s Gyro Compass 9711 C & Ku-Band TXRX
5-2
Fixed mode is used when you do not have a gyro compass, but the ship/vessel/rig is stationary at a fixed
heading that you can manually enter for satellite targeting. This allows you to use a standard (small) search
pattern and acquire the satellite relatively quickly.
No gyro mode is used when you do not have a gyro compass, the ship does turn and you will use “Sky
Search” to initially acquire the satellite. The Sky Search drives the antenna to the calculated elevation angle
and then drives azimuth CW 360 degrees, steps elevation up and then drives azimuth CCW 360 degrees and
continues to alternately steps elevation up/down and drives azimuth alternately CW/CCW 360 degrees.
Because of this large search area, acquiring the satellite will take MUCH longer than if you have valid heading
input.
To change: Set the Scan Rate parameter to 5 deg/sec.
Turn on SAT REF Mode. (It must be turned on.)
This combination of settings will cause “No Gyro” Search pattern to be use to find the desired satellite (refer to the
setup – Searching lesson).