HC3
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User Manual
Rev. 1.0L - 16/05/01
11. Calibration Procedures
11.1
Introduction
This chapter describes the calibration procedures that are necessary to do when
you have replaced some cards or some devices, or in case of a complete
replacement of the equipment into of a transmitter station.
All calibrations must be executed switching on all equipment at the minimum power.
11.2
CPU Assembly Adjustment
NOTE: This section describe the adjustment of the CPU group, in case of a
substitution if it is breakdown.
•
After changing the assembly, connect the amplifier as shown in the figure below.
•
Switch ON the HC3.
Temperature reading adjustment
•
Measure the temperature of the cooling fin with a thermometer.
•
Enter on the P.A. menu.
•
Adjust the trimmer TR6 to read on the display the same temperature measured
with the thermometer.
Mains reading adjustment
•
Measure the main voltage with a multimeter.
•
Enter on the P.A. menu.
•
Adjust the trimmer TR8 to read on the display the value of 100% (the main
voltage is visualizated as percentage variation and the value 100% representes
220V).
Trimmer TR7 adjustment
•
The trimmer TR7 must be turned completely counter-clockwise, to protect the
input channel to the CPU.
