Harris Maxiva ULX COFDM Series - Exciter a & B Threshold Settings

10/6/10 888-2629-200 5-23
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Maxiva ULX COFDM Series
Figure 5-11 Threshold Setting Screen
5.8.5.1 Exciter A & B Threshold Settings
Exciter A and B detector levels should be approximately 2.7V. This assumes a 100mW
(average) out.
Exciter A and B threshold levels can be set using the following steps:
STEP 1 Set the exciter to nominal output 100 mW (average).
STEP 2 Lower exciter output power to 50 mW (using the web browser).
STEP 3 Press the threshold Cal window and adjust the Cal value higher in
.1 V increments until the red fault LED on the TCU exciter switcher
card lights.
NOTE:
To view the LED on the exciter switcher card the front panel of the TCU must be
pivoted downward.
STEP 4 Lower the threshold Cal window value in .05 V increments until the
red LED on the exciter switcher card goes out.
STEP 5 Press done to accept this level.