MotoSAT J1 User And Installation Manual page 28

On initial Search the J1 will choose a Satellite Longitude equal to the GPS
Longitude (Reference Satellite). This causes the J1 to search for Satellites
near the top (apogee) of the Satellite Arc.
Setting the Search window narrower will reduce the total number of
Satellites that the Sat Table will ID. This reduces the ID time because the
J1 Controller will not have to test as many Satellite DVB Carriers. If the
Satellite Table is built efficiently this can reduce the Search Times.
If the Search Window value is set to a larger number this will allow more
Satellites to be identified during the search but will require more ID Time
on every unknown Satellite the system stops on.
Elevation Search Window (10)
The Elevation Search Window is the vertical search area of the Mount
after a Reference Satellite has been located. The J1 will determine the
calculated relative location of the Target Satellite from the Reference
Satellite Location. The J1 will begin a search for the Target Satellite in
the middle of the Elevation Search Window and continue to move the Dish
Elevation higher and lower from this location at the end of every Azimuth
pass until the total value set in this window has been searched. i.e. a value
of 10 in this window will allow the elevation to search 5 degrees above
and below the calculated Target location.
The Default value for Elevation Search Window is 10. This value can be
narrowed if the vehicle is always very level, but not recommended. If the
Mount/Dish is placed on a Skid or Pallet and the ground is not level
increasing this value may be necessary.
Minimum Search Angle
This is the lowest Satellite Look Angle allowed by the J1 Controller when
in search mode. From the factory the J1 is set with an angle of 17 degrees.
Once the Dish is mounted on a roof or platform this value can be changed
as necessary as long as full Azimuth Rotation will not cause the LNB to
hit objects in this rotation. Normally 17 degrees will work for most of the
US and Southern Canada.
Isolation Optimization
Isolation Optimization is used to set Cross Polarization (Cross Pol) of the
antenna Transmitter to an acceptable Isolation level.
(17)
(Low)
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