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March 2007
12
Revision B
h)
Place the 1040L power switch to the "ON" position.
i)
Observe the gain versus frequency sweep on the oscilloscope.
•
The average gain should be greater 55 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 HP435B
c)
Spectrum Analyzer.
d)
Attenuator (30dB)
e)
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 30 kHz, for an
indicated output of 400 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
