R.V.R. Elettronica HC4, Руководство пользователя

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HC4
33 / 34 User Manual Rev. 1.0L - 01/04/02
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 HC4.
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).