User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD ATSC System Set-up
Transmitter/Regenerative Translator Procedure
Instruction Manual, Rev. 2 122
System Set Up Procedure
This system was aligned at the factory and should not require additional adjustments to
achieve normal operation.
This Innovator CX Series system is of a drawer design with multiple boards inside the
drawer. If a board fails, that board needs to be changed out with a replacement board.
The failed board can then be sent back to UBS-Axcera for repair.
NOTE: Contact UBS-Axcera Customer Service Department at 1-724-873-8100 or fax to 1-
724-873-8105, before sending in any board or module.
ALC Board Set-Up - Forward and Reflected Power Calibration
NOTE: If your system is a CU1TD/RD-1 or higher power with one or more external
amplifier drawers, refer to the next section for the forward and reflected power
calibration procedures.
The steps for calibrating the forward and reflected power using the ALC board are as
follows:
1. Locate (A4) the ALC Board (1315006).
2. Set the Overdrive Threshold potentiometer (R38) fully CW.
3. Set the Manual Adjust potentiometer (R62) fully CCW.
4. Set the ALC Adjust potentiometer(R75) fully CCW.
5. Switch S1 to Manual Gain.
6. Increase the output power to 100% using R62.
7. Calibrate the system output power for 100% using the Forward Calibration
potentiometer (R23) on the Output Detector Board - Refer to Figure 63.
8. Turn the output power down to 10% power using R62 on the ALC Board.
9. Remove the RF output connector from J2 on the drawer.
10. Calibrate the reflected power to 10%, using the Reflected Calibration
potentiometer (R7) on the Output Detector Board - refer to Figure 63.
11. Re-connect the RF output connector to the drawer.
12. Increase the power, in Manual gain mode, to 115% using R62 on the ALC Board.
13. Adjust the Overdrive pot (R38) on the ALC Board, CCW until the overdrive
threshold just trips and the Overdrive Fault LED DS4 lights.
14. Turn R38 slightly CW so that power comes back up and DS4 goes out.
15. Switch S1 on the ALC Board to ALC.
16. Turn the ALC Adjust potentiometer (R75) on the ALC Board until the power is
100%.
17. Switch S1 between ALC and Manual to verify smooth switching, with minimal
change in power. If necessary repeat the above procedure.
18. With the drawer in ALC, use the ALC Adjust potentiometer (R75) to decrease the
power to 10%.
19. Remove the RF output connector from the drawer.