Specifications

Coastal 14E Ku-Band TVRO Maintenance
3-3
Figure 3-1 LNB rotation during polarization
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ustment
Antenna tracks well at the pier, but
loses the satellite when underway
1. Call dealer/agent for further assistance
Antenna does not stay on satellite
at pier, or underway
1. Check all coax cables for poor connection
2. Call dealer/agent for further assistance
3.5. Linear Polarization Adjustment
As the polarization is mis-adjusted, the signal level will degrade. If it is mis-adjusted far enough, the
signal will be completely lost.
Polarization is adjusted for a desired satellite when the system is initially installed. Subsequently it needs
only to be adjusted when changing from one satellite to another, or when the boat has traveled a
significant geographic distance. It should NOT need to be re-adjusted if the boat stays in the same
location and is operating on the same satellite.
Polarization of your Coastal 14E Series antenna must be accomplished manually. Each time you need to
adjust the polarization you will have to take the radome top off, loosen the LNB mounting set screws and
rotate the LNB. When you have optimized the polarity, tighten the set screws and put the radome top
back on.
Note: The polarization control from the Antenna Control Panel is NOT possible.
The antenna reports that it is tracking a good signal by displaying a steady (ON) TRACKING LED. If you
determine that the satellite signal is not the desired satellite, press the NEXT key to search for the NEXT
satellite signal. Continue repeating this procedure until the correct satellite is found. Once the correct
satellite has been found, allow the antenna to track for 4-6 minutes to update the satellite position
information.
3.5.1. Optimizing the polarization while on the desired satellite
This adjustment should be done while the boat is at the pier and antenna is tracking the desired
satellite. When the boat is
traveling to a different geographic
area the polarization may need to
be re-optimized if performance
appears to be degrading.
Select the “Signal Strength”
display of the satellite receiver
(refer to the satellite receiver
manual). While monitoring the
receivers’ signal strength, adjust
polarization up or down in one (or
two) degree increments, then
observe the receivers’ signal
strength for 10-15 seconds to
evaluate the change. If an
improvement is noted, continue
small adjustments in the same
direction until the highest signal strength is obtained. If the adjustment causes a decrease,
adjust polarization in the opposite direction to increase the signal strength. When the polarization
of the antenna is optimum, tighten the set screws and re-install the radome top.