The material contained in this document is the property of Electronics & Innovation Ltd., it is
subject to change without notice.
March 2007
11
Revision B
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 10 kHz and the sweep width to 5 MHz.
c)
Disconnect the 1040L 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.
f)
Return sweep/generator output level to full deflection. Rotate the
step attenuator (CCW) so that the output is reduced by 50 dB.
g)
Reconnect the 1040L into the test set-up of Figure 4-1.
