9711QOR-86 C & Ku-Band TXRX
Antenna Specific Operation
16-9
4.
Press ENTER again to access the SATELLITE – SAT
longitude entry window and set the satellite longitude
to 170.0W and press the ENTER key.
•
The ACU will now calculate the azimuth,
elevation and polarization angles for the
desired satellite (from the ships latitude &
longitude position). In this case, Azimuth
230.9 degrees and elevation 43.6 degrees are
sent to the antenna pedestal PCU. The PCU
knows that the Ku-Band reflector is currently
at an azimuth of 37.8 degrees.
•
The pedestal will now start to rotate CW
193.1 degrees (from 37.8) of relative azimuth
to orient the Ku-Band reflector to a true
azimuth of 230.9 degrees.
•
Polarization will start driving to the
appropriate mode and polarization angle.
•
Elevation of the Ku-Band reflector will initially
target 8 degrees higher than the calculated
elevation value of the satellite (51.6 degrees).
The PCU will pause there until azimuth &
polarization have completed driving and auto-
threshold has established a good OFF-satellite
AGC value. Then elevation will drive down to
the calculated angle (43.6 degrees).
•
If the antenna targeting is accurate enough,
the AGC will rise dramatically as the antenna
elevation drives down to the targeted
(calculated) value. When the AGC value
exceeds the Threshold value, Tracking will
take over and peak the pointing of the
reflector to maximize the satellite signal level.
•
If the antenna targeting is not quite accurate
enough for tracking to immediately take over,
the ACU will wait “Search Delay” number of
seconds and then start a search pattern to
find the satellite. During the search the AGC
value will rise dramatically as the antenna
nears the satellite. When the AGC value
exceeds the Threshold value, Tracking will
take over and peak the pointing of the
reflector to maximize the satellite signal level.
We are now tracking the Ku-Band satellite at 170W. The current
Azimuth of the Ku-Band reflector is 230.9 degrees and the
Elevation is at 43.6 degrees.
Summary of Contents for 9711QOR-86
Page 4: ......
Page 14: ...Table of Contents xiv This Page Intentionally Left Blank ...
Page 26: ...Site Survey 9711QOR 86 C Ku Band TXRX 2 8 This Page Intentionally Left Blank ...
Page 70: ...Installation 9711QOR 86 C Ku Band TXRX 3 44 This Page Intentionally Left Blank ...
Page 74: ...Basic Setup of the ACU 9711QOR 86 C Ku Band TXRX 4 4 This Page Intentionally Left Blank ...
Page 78: ...Setup Ships Gyro Compass 9711QOR 86 C Ku Band TXRX 6 2 This Page Intentionally Left Blank ...
Page 80: ...Setup Band Reflector Select 9711QOR 86 C Ku Band TXRX 7 2 This Page Intentionally Left Blank ...
Page 86: ...Setup Home Flag Offset 9711QOR 86 C Ku Band TXRX 9 4 This Page Intentionally Left Blank ...
Page 90: ...Setup Targeting 9711QOR 86 C Ku Band TXRX 10 4 This Page Intentionally Left Blank ...
Page 96: ...Setup Searching 9711QOR 86 C Ku Band TXRX 11 6 This Page Intentionally Left Blank ...
Page 122: ...Antenna Specific Operation 9711QOR 86 C Ku Band TXRX 16 12 This Page Intentionally Left Blank ...
Page 126: ...Functional Testing 9711QOR 86 C Ku Band TXRX 17 4 This Page Intentionally Left Blank ...
Page 190: ...Drawings 9711QOR 86 C Ku Band TXRX 23 2 This Page Intentionally Left Blank ...
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