SITE TEST PROCEDURE
F - 12
FOUR AXIS SYSTEM
26. Drive the feed tube CCW until the soft limit stops the
movement of the feed tube. _______(Check)
27. Check the display for a SOFT LIMIT message. _______(Check)
28. Record the 4th Axis angle at which the limit occurred. ______(Record)
29. Drive the feed tube CW to check that the feed tube will
back out of the soft limit. _______(Check)
30. Drive the feed tube CW until the soft limit stops the
movement of the feed tube. _______(Check)
31. Check the display for a SOFT LIMIT message. _______(Check)
32. Record the 4th Axis angle at which the limit occurred. ______(Record)
33. Drive the feed tube CCW to check that the feed tube will
back out of the soft limit. _______(Check)
1.8 Steptrack Tests
1.8.1 Input Signal Variation
Accurate tracking is predicated on a stable reference tracking signal. Therefore, the
stability of the tracking signal must be established before system tracking accuracy
can be evaluated.
Observe the beacon level on the 7200 display with the antenna parked at beam
center for at least one minute and record the signal variation in the following table.
Signal Variation (dB)
If the observed variation is in excess of +/- 0.1 dB, evaluation of the system
tracking accuracy will be uncertain, limited by the amount of fluctuation present.
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