Jackson Labs PHASE STATION 53100A, User Manual, Page: 101 / 225

PhaseStation 53100A User’s Manual V1.04 25-Apr-2022 101
Mark spurs in noise traces ( Ctrl-m )
Suppress spurs in noise traces ( Ctrl-s )
For a detailed discussion of these commands and other aspects of spur detection and
rendering in phase noise and AM noise plots, see page 66.
Smooth noise traces ( Ctrl-w )
This command applies some light exponential smoothing to traces in the phase noise
and AM noise measurement views. Detected spurs are always removed from smoothed
traces. If enabled, smoothing is turned off automatically when the
Trace → Suppress
spurs in noise traces ( Ctrl-s ) command is used to toggle spur attenuation.
To obtain a smoother trace with cross-correlating analyzers such as the PhaseStation
53100A, TimePod 5330A and Symmetricom 512x models, it’s often better to let the
measurement run longer. As the trace converges on the true noise level its variance will
diminish, resulting in a more accurate measurement with less visible “grass.”
Show raw noise trace(s) (
Ctrl-r
)
This command displays the
raw phase noise or AM noise
spectrum from the ADCs in
both measurement channels
of the PhaseStation 53100A
and TimePod 5330A.
Figure 47: Trace smoothing
Figure 48: Viewing the raw ADC noise traces