Installation
9711QOR-86 C & Ku-Band TXRX
3-42
mounting frame). Do NOT add counter-weight during this step.
4.
Last, balance the antenna with the elevation pointed at, or near, zenith (referred to as top to bottom
balance) by moving existing counter-weights from the top to the bottom or from the
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.
3.15.5.
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 drive is neutral. Tracing
above the reference line means that that axis is being driven 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, as shown below.
•
The Cross Level displayed above the reference line indicates that the CL axis is being driven CCW
(Left in CL).
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 CCW drive is required to keep
the Cross-Level beam level to the horizon.
Summary of Contents for 9711QOR-86
Page 4: ......
Page 14: ...Table of Contents xiv This Page Intentionally Left Blank ...
Page 26: ...Site Survey 9711QOR 86 C Ku Band TXRX 2 8 This Page Intentionally Left Blank ...
Page 70: ...Installation 9711QOR 86 C Ku Band TXRX 3 44 This Page Intentionally Left Blank ...
Page 74: ...Basic Setup of the ACU 9711QOR 86 C Ku Band TXRX 4 4 This Page Intentionally Left Blank ...
Page 78: ...Setup Ships Gyro Compass 9711QOR 86 C Ku Band TXRX 6 2 This Page Intentionally Left Blank ...
Page 80: ...Setup Band Reflector Select 9711QOR 86 C Ku Band TXRX 7 2 This Page Intentionally Left Blank ...
Page 86: ...Setup Home Flag Offset 9711QOR 86 C Ku Band TXRX 9 4 This Page Intentionally Left Blank ...
Page 90: ...Setup Targeting 9711QOR 86 C Ku Band TXRX 10 4 This Page Intentionally Left Blank ...
Page 96: ...Setup Searching 9711QOR 86 C Ku Band TXRX 11 6 This Page Intentionally Left Blank ...
Page 122: ...Antenna Specific Operation 9711QOR 86 C Ku Band TXRX 16 12 This Page Intentionally Left Blank ...
Page 126: ...Functional Testing 9711QOR 86 C Ku Band TXRX 17 4 This Page Intentionally Left Blank ...
Page 190: ...Drawings 9711QOR 86 C Ku Band TXRX 23 2 This Page Intentionally Left Blank ...
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