User's Manual

MASTR III Repeater Calibration Procedure 5/16/2011
Raytheon JPS Communications, Inc. 2-10
8/22/2011
2.2.3 Rx Calibration
2.2.3.1 Go to the Configure > Rx (Automatic) screen.
2.2.3.2 Set the generator to Analog Duplex Mode at the Receiver frequency; set
the modulation for a 1200Hz Sine with 2.83kHz deviation. With the
generator on and set to -70dBm, Check the Rx beam box and start the
oscilloscope on PCCT.
2.2.3.3 Adjust the Rx Offset so the mean of the observed sine wave is centered as
close as possible about zero. Adjust the Rx Gain so that the signal peaks
are slightly less than +17,000 and -17,000 but greater than +14,000 and -
14,000 (Figure 2-9).
Figure 2-9 Rx Gain and Offset Adjustment