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subject to change without notice.
May 2016
10
Revision G
d)
50 ohm Detector - Wavetek D151
e)
Attenuator, 30 dB, 200 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 150 kHz and the sweep width to 150 MHz.
c)
Disconnect the 3100LA 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 steps.
f)
Return sweep/generator output level to full deflection. Rotate the
30 dB Attenuator
RF
Detector
Sweep Generator
RF Output
Sweep
Signal
Trigger
250 KHz
–150 MHz
Input
