Sea Tel 9711-92 Installation And Operation Manual Download

Page: 95 / 196

9711-92 Ku-Band TXRX

Setup – Other Parameters

14-1

14.

Setup – Other Parameters

14.1.

SETUP Parameter display and entry menus.

Press and hold

BOTH the LEFT and the RIGHT arrow keys

for 6 seconds

to access to the

system setup parameters (at the

EL TRIM

selection).

Press

BOTH the LEFT and the RIGHT

arrow keys

momentarily

to access to the

SAVE NEW PARAMETERS

parameter.

Access is only required after installation or repairs of your antenna system. These parameters

should only be changed by an authorized service technician.

CAUTION:

Improper setting of these parameters will cause your system to not perform properly. Also refer to the

SETUP section of your Antenna manual.

14.2.

5V OFFSET & SCALE

Enter the calibration values for the Circular section of the fee in these parameters. See Circular Feed Calibration

Procedure.

14.3.

REMOTE COMMAND

This parameter was used to issue diagnostic commands to the PCU, but is superseded by the use of DacRemP

diagnostic software that your dealer will use when necessary.

14.4.

REMOTE MONITOR

This parameter was used to monitor the results of a diagnostic command which was sent to the PCU.

14.5.

To Disable/Enable DishScan®

When running a

beam pattern

test, a

programmed sweep

for NOC/Satellite Operator,

balancing

the antenna or

motor diagnostics

where you want the drives (AZ, EL & CL) not to be oscillating you will have to

disable

DishScan®.
Select the DISHSCAN® parameter window on the ACU:

Press the

RIGHT

arrow, then press the

arrow and last press the

ENTER

key to turn DishScan® mode ON.

Press the

RIGHT

arrow, then press the

DOWN

arrow and last press the

ENTER

key to turn DishScan® Mode

OFF.

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.
Always assure that you

turn DishScan® back ON

when returning to normal operation.

14.6.

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 input is corrupt,
not stable or not consistently accurate the tracking errors will become large enough to cause the antenna to be mis-

pointed off satellite.
Satellite Reference Mode will uncouple the gyro reference from the azimuth rate sensor control loop. When operating

in Satellite Reference Mode changes in ships gyro reading will not directly affect the azimuth control loop. The

Pedestal Control Unit will stabilize the antenna based entirely on the azimuth rate sensor loop and the tracking

information from DishScan®. This will keep the azimuth rate sensor position from eventually drifting away at a rate
faster than the tracking loop can correct by using the tracking errors to regulate the rate sensor bias.
Satellite Reference Mode can be used as a diagnostic mode to determine if tracking errors are caused by faulty gyro

inputs.
I t is normally

OFF

as long as you have good gyro compass input. It

MUST

OFF

when the elevation angle is

greater than 75 degrees.