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22
RC1500B Single Axis Tracking Antenna Controller
Chapter 3
Installation/Setup
To check the polarity of the polarization motor, the rotating feed limits must be set so that
unrestricted movement of the feed is possible. To achieve this, the Rotating Feed CW Limit
CONFIG mode item must be set to 0, and the Rotating Feed CCW Limit must be set to 1023.
These items are accessed in a manner identical to that described in the previous step of this
procedure.
The polarization motor may be jogged in MANUAL mode. Jog the pol motor and make sure
that movement is in the proper direction - position count decreasing for CW movement, and
increasing for CCW movement. Note that once the rotating feed limits have been set as
described above, there are no limits on polarization movement. The user must be careful to not
move the motor past a limit.
Damage to the rotating feed, polarization motor, or potentiometer may occur if the limits are
exceeded. If the user attempts to jog the polarization motor and no movement is detected on
the position sense lines, or movement is detected in the wrong direction, the ANTENNA POL
alarm will activate. If a polarization alarm is active, an error message will flash on the bottom
row of the display, and the polarization drive will be disabled. The alarm can be de-activated
via RESET mode.
Once the polarity of the motor drive and sense lines have been verified, the pol limits may be
set. To set the limits, the pol motor is jogged to each position where it is desired to set a limit.
This is done from MANUAL mode (with the Rotating Feed CW Limit and CCW Limit
CONFIG mode items set as described above).
It is recommended that an assistant be stationed at the antenna to ensure that the polarization
motor's (or sensor's) mechanical limits are not exceeded. Record the count shown on the
display at each of these positions for CW and CCW limit. Return to CONFIG mode, and enter
these new limits for Rotating Feed CW Limit (the lower value) and Rotating Feed CCW limit
(the greater value).
Research Concepts, Inc.; 5420 Martindale; Shawnee, KS 66218
WWW.RESEARCHCONCEPTS.COM
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