Ferguson Ariva 200 - Manual (Page 12)

The USALS function considerably simplifies configuration of the antenna. The Ferguson receiver
requires that you enter the geographical coordinates of the antenna in order to automatically
calculate the angle of revolution of the motor for individual satellites. The receiver activates the
positioner automatically and turns the antenna to the selected satellite. When a signal is locked
on, you should precisely adjust the antenna's elevation and azimuth settings in order to
optimise signal reception. When correcting the azimuth, the entire antenna assembly and
positioner revolve with respect to the mast. If initially the antenna was not directed precisely
south, you can correct this now. When you have finished with the first satellite, all other
satellites will be remembered automatically, provided that you have introduced their satellite
position values correctly.
Without the USALS function, programming of the system is much more difficult. To this end you
should use the DiSEqC 1.2 function, which turns the antenna to the selected satellite in a nearly
identical manner. Since, however, it does not take into consideration the local geographical
coordinates, the movement is effected on the basis of the prime meridian and the equator.
Therefore it is necessary to introduce corrections separately for each satellite. Due to these
difficulties, manufacturers of DiSEqC 1.2 positioners frequently provide useful software on their
websites, using which you can easily calculate the location of the satellite.
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