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Making the measurement
1
2
Figure 119 Selecting suppressions
There are four different curves for this graph. (For more information about
loop suppression verification, refer to
Features.")
Agilent E5505A User's Guide
Click the Continue button when you have completed the beatnote check
and are ready to make the measurement.
When the PLL Suppression Curve dialog box appears, select View
Measured Loop Suppression, View Smoothed Loop Suppression, and
View Adjusted Loop Suppression. See
e5505a_user_select_suppression.ai
rev2 10/21/03
"Measured" loop suppression curve—this is the result of the loop
a
suppression measurement performed by the E5505A 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, etc).
d
"Adjusted" theoretical suppression curve—this is the new "adjusted"
theoretical value of suppression for this measurement. It is based on
Absolute Measurement Examples
Figure
119.
Chapter
15, "Advanced Software
6
169
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