Sea Tel 9711-92, Installation And Operation Manual

Page: 113 / 196

9711-92 Ku-Band TXRX Installation Troubleshooting
17-9
17.3.7. Fine Balance and Monitoring Motor Drive Torque
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.
•
To view the Torque Commands, select the graph chart.
•
This chart displays the Torque Command errors for each axis via three traces, CL (Cross Level),
LV (Elevation), and AZ (Azimuth), at a fixed 0.195 amps/vertical division.
•
In all axes, tracing centered on the reference line means that that axis is neutral. Tracing
above
the reference line means that that axis is driving CCW. Tracing
below
the reference line means
that that axis is driving CW.
•
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 displayed above the reference line indicates that CL is driving CCW (Left).
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 keep
the Cross-Level beam level (to the horizon).