Agilent Technologies 4395A, Manual Change

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Measuring Phase Deviation
2.
Press
N
NNNNNNNNNNNNNNNN
DELAY .
3.
Press 4
Scale Ref
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AUTO SCALE .
The group delay format displays the phase deviation to the group delay aperture . Therefore ,
setting the group delay aperture aects the trace shape . Setting a wider aperture makes the
trace smoother . The aperture defaults to 1% of the span.
Setting the Group Delay Aperture .
1. Press 4 Bw/Avg 5 .
2.
Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
GROUP DELAY APERTURE .
3. Enter group delay aperture value as a percentage of the span.
The group delay aperture is based on the number of points , not the real aperture . F or example ,
if the number of points is 201, a 1% group delay aperture causes the 4395A to calculate the
group delay using the adjacent measurement points on both sides . Therefore , the group delay
trace may dier depending on the specied number of points .
Aperture 1% Aperture 5%
Figure 8-15. Setting Group Delay Aperture
8-30 Analyzing the Measurement Results