Sea Tel DTV04, Installation And Operation Manual, Page: 45 / 68

DTV04 HD TVRO Antenna Troubleshooting and Maintenance
7-13
7.3.15.
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.
Fine Balance and Monitoring Motor Drive Torque
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 0.195amps/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).
The Level display should decrease (plots below red line) as the antenna requires drive forward (Up in
elevation) and increase (plots above red line) as the antenna requires drive back (Down in elevation).
Example: The antenna pictured in the screen capture below is imbalanced so that it is “Front Heavy”.
The LV trace is plotting above the red line (indicating that drive CW is required to maintain the
current elevation position).