Sea Tel 9797A-27, Инструкция по установке и эксплуатации

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Maintenance and Troubleshooting 9797A-27 C-Band TXRX
7-8
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 DAC-97
parameter list.
5
Align the feed for optimum polarization with the UP/DOWN keys and note the POL display.
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.
7.4.3. To Adjust Tilt:
Select the REMOTE TILT window on the ACU and;
1
While at the Remote Tilt window, press the UP arrow.
2
Set a bubble (or bulls-eye) level on top of the Level Cage assembly.
3
Press the number 5 to zero the tilt sensor bias. NOTE: If the level cage is not within 4 degrees
of level fore/aft or left/right, replace the Level Cage assembly.
4
If the level cage is within 4 degrees, use the 2 and 8 key to adjust LV (fore/aft) until the level
cage is level in this axis.
5
If the level cage is within 4 degrees, use the 4 and 6 key to adjust CL (left/right) until the level
cage is level in this axis.
6
Once the level cage is level in both axes, wait for 30 seconds then press the DOWN arrow key
and then press the ENTER key.
7
Press MODE (or ENTER) to step the menu to REMOTE PARAMETERS.
8
Press the UP arrow key and then press the ENTER key to save the settings in the PCU.
This save the new tilt bias settings in the PCU. Reset or re-initialize the antenna to verify that the Level
cage is properly level with the new settings.
7.4.4. To Reset/Reinitialize the Antenna:
Select the REMOTE COMMAND window on the ACU and;
1
Key in .94 and then hit the ENTER key (note the decimal point) to access the utility commands.
" ^0000 " should appear in the command window.
2
Key in 90 and then hit the ENTER key.
This resets the PCU on the antenna. The antenna will reinitialize with this command (Performs a similar
function as a power reset of the antenna).
7.5. Pedestal Control Unit Configuration (xx97A & xx00)
The PCU is designed to be used with a variety of antenna pedestal configurations. The configuration
information that is unique to each pedestal type is stored in a Non Volatile Random Access Memory
(NVRAM) in the PCU enclosure. If the PCU is replaced or the NVRAM in the PCU should become corrupt,
the PCU must be re-configured to operate with the pedestal it is installed on. The default configuration for the
PCU is model xx97. In this configuration the PCU will not drive any of the three torque motors to prevent