User manual

AutoPol function and the controller does not toggle the polarization position as
the H and V keys are depressed in MANUAL mode, the polarization positions
have probably been programmed at the same value. Other AutoPol problems
result from not having a ground wire connected between the satellite receiver and
the controller. Please refer to figures 3.2 and 3.3. The AutoPol system should not
be enabled when the controller is used with feeds that receive both polarizations
simultaneously.
WHEN A SATELLITE IS SELECTED VIA AUTO MODE THE
CONTROLLER DISPLAYS THE MESSAGE 'ENTRY SELECTED
HOLDS INVALID DATA'.
Before the controller executes an automatic move it checks to see if the azimuth,
elevation, horizontal polarization, and vertical polarization are within their
respective limits. If they are not, the error message is displayed. This error can
occur if the limits were reset after the satellite position was programmed into
memory via SETUP mode. This error can also occur if the state of the POL
Control? CONFIG mode item was changed after the satellite was programmed
into non-volatile memory.
Recovering From Unexpected Memory Upsets
The key to restoring the non-volatile memory is getting the azimuth and elevation
limits and position counts right. The position counts are initialized to 30 when
the azimuth counter-clockwise and down limits are set. If the antenna can be
unambiguously placed at the counter-clockwise and down limits, non-volatile
memory can be restored quite easily. It is probably a good idea to use a punch or
a waterproof magic marker to mark the antenna and mount assembly so that the
azimuth counter-clockwise and down limit positions can be identified. In
addition, it may useful to identify and mark other places on the mount where
slippage could occur. This would allow the mount to be restored to its original
configuration. The procedure for restoring non-volatile memory is outlined in
Appendix B Field Upgrading.
Note that the procedure for restoring non-volatile memory only works if the count
characteristics of the actuators are not changed. If the actuator count
characteristics are changed, the count values that correspond to the west and up
limit will change, as will the positions of all of the satellites