Sea Tel ST88-21 C/Ku-Band TVRO, Installation And Operation Manual

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ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting
13-17
13.7.8. Open Loop Motor Test
The DacRemP
Comm Diagnostics
Window provides a means to enter in Remote Commands for driving
each individual torque motor to test that motors functionality. By driving each axis and observing the
resulting motion of the antenna, a coarse operational status of the motor and motor driver may be
established.
•
To manually drive the motors, select the “Comm Diagnostics” window under to the Tools
submenu or Press “CTRL + C”
•
Using the small field in the upper left hand corner of
the window, type in the remote command and verify
the motor appropriately drives in the direction
commanded.
•
To drive the cross level motor, key in
^
1064,
^
1128 or
^ 1192 and press ENTER to drive the Cross Level axis
LEFT, OFF or RIGHT respectively.
•
To drive the level motor, key in ^ 2064, ^ 2128 or ^ 2192
and press ENTER to drive the level axis FORWARD,
OFF or BACKWARD respectively.
•
To drive the azimuth motor, key in ^ 3064, ^ 3128 or
^ 3192 and press ENTER to drive the azimuth axis CW,
OFF or CCW.
13.7.9. To Disable/Enable DishScan®
Tracking optimizes the pointing of the antenna, in very fine step increments, to maximize the level of the
satellite signal being received. DishScan® is the
default
mode of tracking.
To toggle the ON/OFF state of DishScan®, select the remote parameter DISHSCAN. This remote parameter
allows you to view, or change, the DishScan® ON/OFF status.
1. Press UP arrow and ENTER to turn DishScan® ON.
2. Press DOWN arrow and ENTER to turn DishScan® OFF.
3. If you change this remote parameter, you must save the change using REMOTE PARAMETERS.
If DishScan® is
OFF
and the
Step Integral
parameter is set to
0000
, you will get a
constant
ERROR
0016
(DishScan® error) and you will see
zeros
flashing in the lower left of the Azimuth and Elevation ENTRY menu
displays. This is a visual indication that DishScan® is turned OFF.
When DishScan® is turned OFF, the system will NOT be able to properly track any satellite.
13.7.10. Satellite Reference Mode
The ships gyro compass input to the ACU may be accurate and stable in static conditions and yet may NOT
be accurate or stable enough in some underway dynamic conditions. If there is no gyro compass or if the