Group delay measurements can be made on linear frequency, log frequency, or list frequency
sweep types (not in CW or power sweep). Group delay aperture varies depending on the
frequency spacing and point density, therefore the aperture is not constant in log and list
frequency sweep modes. In list frequency mode, extra frequency points can be
deiined
to
ensure the desired aperture.
To obtain a readout of
aperture..values
at different points on the trace, turn on a marker. Then
press
m
~~~~~~~~~,~~~~~,
~.~..~...............
i
. . . . . . . .
/..A....:..:
..i
.:..:...:
..::::
.:::::
.:..:::...i;:
.*
Smoothing
apedme
becomes
the
adive
fun&ion,
and
a
the
aperture is varied its value in Hz is displayed below the active entry area.
640
Application and Operation Concepts