User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD Appendix A: System &
ATSC Transmitter/Regenerative Translator Drawers Drawings and Parts List
Instruction Manual, Rev. 0 A-2
ALC Board Set-Up, Forward and Reflected Power Calibration for CU0TD/RD-1
thru CU0TD/RD-5 Systems
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.
Refer to Figure 16. Locate (A5) the ALC Board (1308570 & 1312207), preset the
Overdrive Threshold pot R38 full CW and set R62, Manual Adjust, and R75, ALC Adjust,
full CCW.
Switch S1 to Manual Gain, and increase the output power to 100% using R62. Calibrate
the system output power for 100% using R23, the Forward Calibration pot, on the Output
Detector Board. Refer to Figure 17.
Figure 17: (A7) Output Detector Board (1308685 & 1312207)
R23
FORWARD
CAL ADJ
R7
REFLECTED
CAL ADJ