Sea Tel COASTAL 18 Installation And Operation Manual Download

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Coastal 18 Ku-Band TVRO

Operation

2-5

re-install the radome top.

2.4.2. Setting polarization for a different satellite (changing satellites)

When changing from one satellite to another you may need to adjust the polarization of the LNB to be
able to acquire the satellite you want to switch to. This will only be required if the difference in
polarization angle of the two satellites is greater than ten degrees.

Assure that you have optimized the polarization for the satellite you are presently on using the
procedure in 2.4.1.

Compare the longitude of the satellite you are presently on to the longitude of the satellite you
will be switching to. Note the amount & direction of the difference in longitude position of the
two satellites. Adjust the polarization 10 degrees for each 10 degrees of longitude difference
between the two satellites. If the satellite you are switching to is further East from the present
satellite you will need to adjust polarization DOWN the appropriate number of degrees. If the
satellite you are switching to is West from the present satellite you will need to adjust
polarization UP the appropriate number of degrees. Examples:

Presently optimized on Astra 1 at 19.2E and want to switch to Hotbird at 13.0E.
Difference is less than 10 degrees, so no adjustment is necessary before searching for
the next satellite (step 4).

Presently optimized on Astra 1 at 19.2E and want to switch to Astra 2 at 28.2E.
Difference is about 10 degrees East. You need to rotate the LNB (POL DOWN) 10
degrees and then search for the next satellite (steps 3 & 4).

Presently optimized on Astra 1 at 19.2E and want to switch to Thor 1 at 0.8W. Difference
is about 20 degrees West. You need to rotate the LNB (POL UP) 20 degrees and then
search for the next satellite (steps 3 & 4).

Adjust polarization UP/DOWN the amount determined in step 2.

Press NEXT to search for the next satellite. If the next satellite found is not the desired satellite,
press NEXT to continue searching. Repeat searching until the desired satellite is found. Allow
the antenna to track the satellite for about two minutes.

Optimize polarization while on the new satellite using the procedure in 2.3.1.

If you will be changing satellites periodically to view different programming, note the polarization for each
of the satellites you will be using. It may also be helpful to record the elevation of the satellites you will be
using. Setting the elevation and polarization before searching for the next satellite will help shorten the
search process. Elevation of the satellite(s) may be entered & saved using SETUP Mode.

2.4.3. Setting polarization when you have changed geographic areas

If the boat is travelling a great distance it is recommended that you optimize the polarization using the
procedure in 2.4.1 after each 10 degree latitude or longitude change. If you have changed latitude and
longitude by a significant geographic distance, while the antenna has been turned off, it may be
necessary to adjust the polarization to find the desired satellite.

If you are able to find (and identify) a satellite, optimize the polarization and follow the procedure in
section 2.4.2 to change from the satellite you are presently on to the one you desire to be using. If you
are not able to find any satellites, adjust polarization up or down 10 degrees and press NEXT to search
for a (next) satellite signal. Continue adjusting polarization and searching, until a satellite signal is found
and you can follow the procedure in section 2.4.2 to change from the satellite you are presently on to the
one you desire to be using.

If after all polarization settings have been tried and no satellite signal can be found, refer to the
Troubleshooting section of this manual.