Keysight Technologies N5511A User Manual page 315

Advanced Software Features
Phase-Lock-Loop Suppression
There are four different curves available for this graph:
a. "Measured" loop suppression curve
b. "Smoothed" measured suppression curve
c. "Theoretical" suppression curve
d. "Adjusted" theoretical suppression curve
N5511A Phase Noise Test System User's Guide
loop suppression measurement performed by the N5511A system.
representation of the measured results, it is used to compare with the
"theoretical" loop suppression.
suppression based on the initial loop parameters defined/selected for this
particular measurement (kphi, kvco, loop bandwidth, filters, gain, etc.).
15-9) —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.
(Figure 15-4)—this is the result of the
(Figure 15-5)—this is a curve-fit
(Figure 15-6)—this is the predicted loop
(Figure 15-7 through Figure
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