9711-92 Ku-Band TXRX
Maintenance
18-3
bottom to the top
. Always move weight from one location on the equipment frame to the same
location on the opposite side of the equipment frame (ie from the top left of the reflector
mounting frame to the bottom left of the reflector mounting frame). Do NOT add counter-weight
during this step.
5.
When completed, the antenna will stay at any position it is pointed in for at least 5 minutes (with no
ship motion).
6.
Do NOT cycle antenna power to re-Initialize the antenna
. Return to the ACU, which is still in
REMOTE BALANCE mode, and press ENTER to exit Remote Balance Mode. When you exit Balance
Mode the antenna will be re-initialized, which turns DishScan®, Azimuth, Elevation and Cross-Level
drive ON.
18.3.2.
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).
Summary of Contents for 9711-92
Page 3: ......
Page 10: ...Table of Contents x 22 2 9711 GENERAL DRAWINGS 22 1 This Page Intentionally Left Blank ...
Page 22: ...Site Survey 9711 92 Ku Band TXRX 2 8 This Page Intentionally Left Blank ...
Page 62: ...Basic Setup of the ACU 9711 92 Ku Band TXRX 4 4 This Page Intentionally Left Blank ...
Page 64: ...Setup Ships Gyro Compass 9711 92 Ku Band TXRX 5 2 This Page Intentionally Left Blank ...
Page 66: ...Setup Band Select 9711 92 Ku Band TXRX 6 2 This Page Intentionally Left Blank ...
Page 72: ...Setup Home Flag Offset 9711 92 Ku Band TXRX 8 4 This Page Intentionally Left Blank ...
Page 80: ...Setup Searching 9711 92 Ku Band TXRX 10 6 This Page Intentionally Left Blank ...
Page 100: ...Antenna Specific Operation 9711 92 Ku Band TXRX 15 4 This Page Intentionally Left Blank ...
Page 104: ...Functional Testing 9711 92 Ku Band TXRX 16 4 This Page Intentionally Left Blank ...
Page 120: ...Installation Troubleshooting 9711 92 Ku Band TXRX 17 16 This Page Intentionally Left Blank ...
Page 142: ...Maintenance 9711 92 Ku Band TXRX 18 22 This Page Intentionally Left Blank ...
Page 160: ...Drawings 9711 92 Ku Band TXRX 22 2 This Page Intentionally Left Blank ...
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