To Adjust Tilt - Sea Tel 9707D-70 C-BAND TX Installation And Operation Manual

9707D-70 C-Band TXRX
8.
NOTE: If the feed does not allow a full 180 degree rotation to the CCW position, (CW looking into the
dish), move the feed as far as it will go and readjust the Polang potentiometer setting so the POL display
shows 30-32. Move the feed to the center position and note the new reading. Calculate the POL
OFFSET as the Center minus POL SCALE value and enter in the ACU parameter list.
9.
Polang Operation and Alignment
10. Set the POLANG for auto operation (POLANG TYPE = 72). Enter your longitude into SAT menu
11. Verify the system returns the feed to TX Port Horizontal Polarity.
12. Turn DishScan ON (Comm Diagnostic's window (CTRL+F) and click DishScan "Tg")
13. Select REMOTE PARAMETERS and press ► arrow key and then Enter key to save
14. Turn Tracking OFF. Set POLANG for manual operation (SETUP menu: POLANG TYPE = 9)
15. Determine optimize polarization by manually adjusting POLANG for the maximum tracking signal
To Optimized polarization, refer to setup chapter of this manual.
7.4.3.
A REMOTE TILT calibration is required to align the level cage assembly correctly so that all sensors will be
aligned accurately to the axis they relate to. The fluid filled tilt sensor provides a two dimensional horizon
reference. The system is not able to automatically calculate the exact center value, therefore it is necessary
to perform this procedure to manually enter any offset required to make sure the PCU receives a true
reference to the horizon. The procedures below describes the process of performing this calibration from
either the ACU front panel or DacRemP diagnostic software by connecting the ACU's RS-422 M&C Port to an
available serial port on a Laptop/Desktop computer using a standard 9 pin serial cable.
Step 1 Turn Off DishScan Drive.
Using the DAC2202 ACU Front Panel
Using DacRemP
(Steps 2-7 will require assistance to observe and operate antenna simultaneously)
Step 2: At Antenna, If not already installed, place a circular level bubble on top lid of level cage.
Rotate the feed CCW 180 degrees or as far as it will travel, viewed looking towards the satellite (CW
looking into the dish). If the feed allows full 180-degree rotation, the POL display will show 90
counts below the center reference value.
Select the POL TYPE parameter again and change the POL TYPE to 72 (64+8) to enable auto pol. If
the POL position is not optimum using auto pol, trim the POL position up or down by adjusting the
POL OFFSET parameter.
level on the spectrum analyzer or ACU AGC or under guidance of the NOC during a Cross-Pol
isolation test.

To Adjust Tilt:

Go to Remote Command window by pressing and holding the two LEFT & RIGHT arrows
1.
until the EL TRIM parameter is displayed.
Press and release both Left & Right arrow keys again. The "SAVE NEW PARAMETERS"
2.
window should now be displayed.
3. Press either the
TG" parameter is displayed.
4. Press the "RIGHT arrow to activate selection, then press the
state to OFF. Press the
generated when DishScan movement is off.)
:
1. Click on the
is turned off by clicking the Error LED on main display panel, there should be a check mark
next to Conscan/DishScan)
Maintenance and Troubleshooting
:
ENTER key or the
ENTER key (Note: You will see that an error code 16 is
icon in the Comm Diagnostics window. (Verify that DishScan
7-15
DOWN key until the "REMOTE DishScan
Up arrow to toggle