Installation
4. Using the PMCU hold the EL AXIS CONTROL switch in the DOWN position and
drive the antenna into the EL DOWN limit. Verify that the downward movement
of the antenna stops and that upward motion is allowed. If UP and DOWN limits
are operating backward, switch wires on TB1-4 and TB1-6.
5. Using the PMCU hold the POL switch in the CW position and drive the feed
tube into the CW limit. Verify that the CW movement of the feed tube stops
and that CCW motion is allowed. If CW and CCW limits are operating
backward, switch wires on TB1-7 and TB1-9.
6. Using the PMCU hold the POL switch in the CCW position and drive the feed
tube into the CCW limit. Verify that the CCW movement of the feed tube stops
and that CW motion is allowed.
7. The 4-axis Systems have a 4th Axis that is part of the feed assembly. Since
many different versions of the feed arrangement exist, additional information
will be supplied as needed.
If any of the limit switches do not operate in the manner described above in steps
1 through 4, discontinue operation of the system until the problem is corrected.
Limit circuit problems can usually be traced to a wiring error between the switch
and drive cabinet.
After ensuring proper operation of all limits, set the limit stops for each axis to
ensure clearance of all obstructions while allowing only the necessary total antenna
travel in each axis.
4.4.1.5 AZ and EL Speed Adjustments
Low and high-speed drive rates for the AZ and EL axes are preset parameters
inside each drive.
4.4.2 ACU Power-Up and Initialization
The procedures that follow prepare the system for site acceptance tests.
Set the drive cabinet MAINT/REMOTE switch to REMOTE to transfer control to the
7200 ACU.
Refer to Section 5.0 of this manual for operation of the 7200 ACS, especially
Section 5.6, Power-Up Procedures.
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