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December 2015
9
Revision F
output.
f.
Observe the harmonic distortion of the output on a spectrum analyzer.
The harmonic components contributed by the amplifier should be
better than 20 dB down from the fundamental.
(a)
If the above items are found to be outside of the specification, check
the spectral content of the input signal. If this is a pure signal then
the unit needs to be returned to the factory for service.
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, 200 Watts Bird
Figure 4-1. Gain Measurement
30 dB Attenuator
RF
Detector
Sweep Generator
RF Output
Sweep
Signal
Trigger
250 KHz
– 150 MHz
Input
