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August 2012 Revision F
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step attenuator (CCW) so that the output is reduced by 53 dB.
g)
Reconnect the 1020L into the test set-up of Figure 4-1.
h)
Place the 1020L power switch to the "ON" position.
i)
Observe the gain versus frequency sweep on the oscilloscope.
The average gain should be greater 53 dB
The gain variation should be within the 3 dB as shown on the
oscilloscope.
4.4.2 Measurement of Harmonics
Figure 4-2.
1.) Equipment Required:
a)
Sweep/Signal Generator
b)
Calorimetric Power Meter HP434A
c)
Spectrum Analyzer.
d)
Attenuator (20dB)
e)
Attenuator (30dB)
f)
Coupler (30 dB)
2.) Connect the Equipment as shown in Figure 4-2, then
proceed as follows:
a)
Adjust the signal generator to a CW center frequency of 10 kHz, for an
indicated output of 200 watts on the power meter.
b)
Using the spectrum analyzer, check that the level of the carrier
harmonics is less than -15 dB with respect to the carrier while manually
30 dB
coupler