Jackson Labs PHASE STATION 53100A, Руководство пользователя

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PhaseStation 53100A User’s Manual V1.04 25-Apr-2022 65
Integrated noise and jitter measurement
You can display various measures of integrated phase noise between two arbitrary
offsets by enabling any or all of the following fields in the
Legen d→Select menu:

Residual FM

RMS Integrated Noise (Degs)

RMS Integrated Noise (Rads)

RMS Time Jitter

SSB Carrier/Noise
When one or more of these
parameters is enabled for
display in the legend table,
two “spot cursors” will appear
in blue, as shown at right. You
can move these lower and
upper limit cursors with
Ctrl-
left click and Ctrl-right click ,
respectively.
TimeLab does not make a
distinction between random
and deterministic jitter, so any spurs in phase noise plots are “integrated” as if they
contained only random noise. Consequently, when viewing any of the RMS integrated
noise values, you should use either
Trace → Smooth noise traces (
Ctrl-w
)
or
Trace → Suppress spurs ( Ctrl-s ) to remove as much coherent energy as possible from the
phase noise trace. Otherwise, time jitter and integrated-noise readings may be
artificially exaggerated.
Along with many other sources, HP Application Note AN270-2 provides a concise
summary of the math behind phase-noise integration.
Figure 27: Measuring jitter with RMS noise integration, 20 Hz - 20 kHz