User Guide

PAMS
Technical Documentation
NHB–3
Service Software Instructions
Original 26/97
Page 32
When signal data is received, distance to clipping signal level is shown as dBs
on the display. When either signal or noise measurement results are received,
”MEASURING” text is removed and the help line is on the display. When both
measurements (signal and noise) are done at least once, the signal to noise
relation and difference are also shown on the display.
When exit is performed, the next selections are set to the values which were
they selected before this adjustment.
– active unit
– operation mode
– AGC value
Compensation factors:
comp_factor1 = 4.64 dB (Compensation factor for 67.71 kHz signal,
because ASIC filter attenuates 67.71 kHz signal 4.64 dB)
comp_factor2 = 2.27 dB (Compensation factor for real and calculated
noise bandwidth difference. Real noise bandwidth is
80 kHz and calculated bandwidth is 135 kHz)