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February 2007
11
Revision B
g)
Reconnect the 240L into the test set-up of Figure 4-1.
h)
Place the 240L power switch to the "ON" position.
i)
Observe the gain versus frequency sweep on the oscilloscope.
•
The average gain should be greater 50 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 40 watts on the power meter.
b)
Using the spectrum analyzer, check that the level of the carrier
30 dB
coupler
