Setup; Operator Settings; Optimizing Targeting (Auto Trim); Optimizing Targeting (Manually) - Sea Tel 9707D-70 C-BAND TX Installation And Operation Manual

9707D-70 C-Band TXRX
5.

Setup

Below are basic steps to guide you in setting up the ACU for your specific antenna pedestal. Assure that the Antenna Pedestal
(ADE) has been properly installed before proceeding. Refer to the Setup section of you ACU manual for additional parameter
setting details.
5.1.

Operator Settings

Refer to the Operation chapter of this manual to set the Ship information. Latitude and Longitude should
automatically update when the GPS engine mounted above decks triangulates an accurate location, but you may enter
this information manually to begin. If your gyro source is providing Heading information in any format other than
NMEA-0183 format, you will have to enter in the initial Ship's Heading position, the Gyro Compass will then keep the
ACU updated.
Set the Satellite information, for the satellite you will be using. The receiver settings are especially important. At this
point you should be able to target the desired satellite. Continue with the setup steps below to optimize the
parameters for your installation.
5.2.

Optimizing Targeting (Auto Trim)

The following feature requires your antenna have GSR2 minimum software versions installed. First, assure that all of
your Ship & Satellite settings in the ACU are correct. Target and, if required manually locate the desired satellite.
Allow 1 to 2 minutes for the antenna to "peak" on the signal. Verify positive satellite identification, in a TVRO system
verify either Receive NID or that at least one Television is producing video, in a VSAT system verify receive lock
indication on the satellite modem.
Access the ACU Setup Mode Parameter "AUTO TRIM", Press the UP arrow and then press Enter.
Drive the antenna completely off satellite (Target and Azimuth value of 0)
Retarget the satellite and verify the system peaks on satellite with positive satellite identification within 1 minute.
Access the ACU Setup Modes "SAVE NEW PARAMETERS", Press the UP arrow and then press Enter
5.3.

Optimizing Targeting (Manually)

First, assure that all of your Ship & Satellite settings in the ACU are correct. Target the desired satellite, immediately
turn Tracking OFF, and record the Azimuth and Elevation positions in the "ANTENNA" display of the ACU (these are
the Calculated positions). Turn Tracking ON, allow the antenna to "Search" for the targeted satellite and assure that it
has acquired (and peaks up on) the satellite that you targeted. Allow several minutes for the antenna to "peak" on the
signal, and then record the Azimuth and Elevation positions while peaked on satellite (these are the Peak positions).
Again, assure that it has acquired the satellite that you targeted!
Subtract the Peak Positions from the Calculated Positions to determine the amount of Trim which is required. Refer to
the ACU Setup information to key in the required value of Elevation Trim. Continue with Azimuth trim, then re-target
the satellite several times to verify that targeting is now driving the antenna to a position that is within +/- 1.0 degrees
of where the satellite signal is located.
EXAMPLE: The ACU targets to an Elevation position of 30.0 degrees and an Azimuth position of 180.2 (Calculated),
you find that Peak Elevation while ON your desired satellite is 31.5 degrees and Peak Azimuth is 178.0. You would
enter an EL TRIM value of –1.5 degrees and an AZ TRIM of +2.2 degrees. After these trims values had been set, your
peak on satellite Azimuth and Elevation displays would be very near 180.2 and 30.0 respectively.
5.4.

Optimizing Auto-Polarization TX/RX

This procedure optimizes the linear polarization of the feed, if your system is fitted with a circular feed you do not
need to optimize the polarity angle and can skip this procedure. At the ACU, turn tracking and DishScan Drive off.
Drive Elevation to horizon. Drive Azimuth to an angle that allows the above decks technician a clear view of the feed
assembly. Verify that Polang Type is set to 9 and POL OFFSET is set to 30. Access the POL sub menu (Antenna sub-
menu). At the ACU drive the feed assembly to pure vertical. At the antenna, disengage the POL Pot and as required
rotate the Pol Pot shaft until the displayed POL counts equal 120 and reengage the POL POT. Reset Polang Type to 72.
Re-enable DishScan Drive. Target and track your desired satellite. Assure that you are peak on satellite and then
access the Skew parameter (Located in the SAT sub-menu under the tracking parameters) Under guidance from the
NOC, enter in the intentional satellite skew of the current satellite beam, if any as a starting point.
5-1
Setup