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subject to change without notice.
August 2012
11
Revision E
4.3.1 Measurement of Gain
1. Equipment Required (or equivalent):
a)
Osilloscope - Tektronix T921
b)
Sweep/Generator - HP8601A
c)
Signal Generator - Exact Model 7060
d)
50 ohm Detector - Wavetek D151
e)
Attenuator, 30 dB, 500 Watts Bird
Figure 4-1. Gain Measurement
2. Connect the equipment as shown in Figure 4-1, then proceed as follows:
a)
Set the oscilloscope to DC, Time/cm to Ext. X, and gain to
l0mv/cm.
b)
Set the sweep generator to the video sweep mode with the start
frequency at 300 kHz and the sweep width to 35 MHz.
c)
Disconnect the A150 from the set-up and connect the
sweep/generator RF output directly to the 30 dB attenuator.
d)
Adjust the output level of the sweep/generator for full vertical
deflection on the oscilloscope face.
e)
Calibrate the scope face to show 3 dB in 1 dB steps by
attenuating the sweep/generator in 1 dB.
