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5
Expanding Your Measurement Experience
Testing the Agilent 8663A Internal/External 10 MHz
5-24
E5500 Phase Noise Measurement System Version A.02.00
There are four different curves available for the this graph (for
more information about loop suppression verification, refer to
Chapter
16, "Advanced Software Features"):
a
"Measured" loop suppression curve - this is the result of the
loop suppression measurement performed by the E5500
system;
b
"Smoothed" measured suppression curve - this is a curve-fit
representation of the measured results, it is used to compare
with the "theoretical" loop suppression;
c
"Theoretical" suppression curve - this is the predicted loop
suppression based on the initial loop parameters
defined/selected for this particular measurement (kphi, kvco,
loop bandwidth, filters, gain, and others).
d
"Adjusted" theoretical suppression curve - this is the new
"adjusted" theoretical value of suppression for this
measurement - it is based on changing loop parameters (in
the theoretical response) to match the "smoothed" measured
curve as closely as possible;
When the measurement is complete, refer to
Your Measurement Results" for help in evaluating your measurement
results.
Figure 5-22
shows a typical phase noise curve for a RF Synthesizer.
Chapter
15, "Evaluating
Document Part No. E5500-90024 Ed. 1.0
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