Fine Balance And Monitoring Motor Drive Torque - Sea Tel 9797B-76 Installation And Operation Manual

9797B-76 C/Ku-Band TXRX
7.7.7.
The DacRemP DISPTC graph chart provides a means for monitoring torque commands required for each
motor for diagnostic purposes and verifying antenna balance. By observing each trace, the required drive of
the antenna via the motor driver PCB may be established.
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Fine Balance and Monitoring Motor Drive Torque

To view the Torque Commands, select the
This chart displays the Torque Command errors for each axis via three traces, CL (Cross Level), LV
(Elevation), and AZ (Azimuth), at a fixed 0.195amps/vertical division.
A normal trace display will be ± 1 divisions from the red reference line while under calm sea
conditions and with DishScan Drive turned off. See example below
The Cross Level display will decrease (plots below red line) as the antenna requires drive to the left
and increase (plots above red line) as the antenna requires to the right.
Example: The antenna pictured in the screen capture below is imbalanced so that it is "Right Heavy".
The CL trace is plotting above the red reference line (indicating that drive CCW is required to
maintain a 90°Cross-Level position).
Maintenance and Troubleshooting
7-17
graph chart.