Sea Tel 9497B-1 Installation And Operation Manual Download

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9497B-1 C/Ku-Band TVRO

Setup

5-1

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.

AUTO TRIM

The Auto Trim function will automatically calculate and set the required Azimuth and Elevation trim offset parameters
required to properly calibrate the antennas display to the mechanical angle of the antenna itself.
Refer to “Optimizing Targeting” in the Setup section of this manual for further details on the parameters set.
To enable this function, the Antenna MUST be actively tracking the satellite with positive SAT ID: After locating the
satellite wait at least 30 seconds before performing the AUTO TRIM feature, this will allow sufficient time for the
antenna to peak up on signal. It is equally important that you verify that the system is tracking the CORRECT satellite
(verify video is produced on the Televisions in a TVRO system or verify a RX lock indication on the satellite modem in a
VSAT system).
While in the AUTO TRIM sub-menu, press the LEFT arrow key to bring start the calibration procedure, the display
should read AUTO TRIM SETUP, press the ENTER key to submit. AUTO TRIM SAVED will be displayed, indicating the
proper AZ and EL trims were submitted to RAM. This does not save these parameters to NVRAM, in order to save to
memory, continue down through the setup mode parameters until the SETUP

SAVE NEW PARAMETERS

sub menu

is displayed. Press the RIGHT arrow and then press the ENTER key. The display should now report that the parameters
were saved.

NOTE:

The AUTO TRIM feature only will work if your system is actively tracking a satellite (AGC above threshold

and

positive SAT ID, internal NID match or external RX lock received, has been established). If any of the previous
conditions are not met, AUTO TRIM LOCKED will be displayed on the front panel, indicating that the AUTO TRIM
Feature is not enabled. From the AUTO TRIM SETUP screen, press any MODE key (DAC2302) or NEXT key (DAC2202)
without hitting ENTER to escape this screen without submitting the new AZ and EL Trim values.

5.3.

Manually Optimizing Targeting

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 /- 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.