Jackson Labs PHASE STATION 53100A, User Manual

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PhaseStation 53100A User’s Manual V1.04 25-Apr-2022 32
bottom of the program’s main window as the software characterizes the device under test (DUT) and
reference input signals.
If all is well, the status bar message should soon change to “Acquisition in progress.” Measurement data
will now begin to appear in graphical form. Unless you’ve selected a different view from the
Measurement menu, you will see an Allan deviation (ADEV) plot for your DUT, rendered in real time at
100 points per second.
Unless you changed the Duration value, the measurement will run for three minutes. This will be long
enough to allow the ADEV trace to reach τ =one minute, and for the phase noise trace to reach 1 Hz. You
can try any of these suggested actions at any time, either during the measurement or after it finishes:
•
Left-click on the ADEV graph or any other log-log plot. Observe that the red
spot cursor
can
be placed at any vertical column. The graph’s Y value at the spot cursor will be displayed in
the
legend table beneath the graph area, updated in real time to reflect the latest reading.
At the same time, ADEV values at assorted tau periods should be displayed in a chart on the
right side of the graph.
•
Left-click and drag a box anywhere on the plot. When you release the left mouse button,
the view should zoom in to magnify the specified area. You can drag an edge (or a corner)
of the box slightly outside of the graph area to expand the plot in that direction. Right-click
to return to the unzoomed view.
•
Try selecting a few of the different graph types in the Measurement menu. Assuming you
didn’t uncheck any of the measurement options in the acquisition dialog, all of the different
graph types should be accessible, updating continuously in a “live” fashion as long as the
measurement is still in progress.
• Now is a good time to start picking up the keyboard shortcuts. Instead of selecting
Measurement → Frequency difference , try the f key. To return to the Allan deviation plot,
use a . Uppercase A selects AM noise, while uppercase P selects phase noise. (In some
cases, the TimeLab features and commands described in this manual will be referenced by
their hotkeys rather than their menu entry names, after the menu entries have been
introduced.)
• Save the measurement data to a .TIM file with File → Save image or .TIM file (s) . A .TIM file
is an ASCII text file that contains the data needed to recreate all of the available graphs
associated with a given measurement. This data includes the entire phase record, as well as
the FFT bins from the phase noise and AM noise plots. You don’t have to wait for the
measurement to end; at any time during a measurement, you can save the available data to
a .TIM file or load another .TIM file for display alongside the existing plot(s) that have been
loaded or acquired.