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Sea Tel 2400 Dual Band C/Ku
Maintenance
16-5
EAR Controlled - ECCN EAR99
16.3.2.
Fine Balance and Monitoring Motor Drive Torque
The GRAPHS
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).
•
The Level display will plot below the reference line when the antenna requires CW drive (Up in
elevation).