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26 Bode Plot
26.1 Overview
The T3DSO2000A supports an automatic bode plot function. This function provides a
frequency response curve of the device-under-test as well as the interface for output
sweep parameter control and data display settings. At this time, either the built-in
waveform generator or one of the T3AFG series of Function Generators are supported.
During the sweep, the oscilloscope configures the generator output frequency and
amplitude and then compares the input signal to the output of the DUT. Gain (G) and
phase (P) are measured at each frequency and plotted on the frequency response bode
plot. When the loop response analysis is complete, you can move the markers on the
chart to see the gain and phase values measured at each frequency point. You can also
adjust the scale and offset settings for the amplitude and phase plots.
Touch Analysis>Bode Plot to recall the bode plot dialog box:
A. Turn on/off the bode plot
B. Configure the bode plot (DUT, AWG connection, sweep
parameters)
C. Turn on/off the operation
D. Set display parameters. You can set the coordinate axis of
bode plot, trace visibility display, and cursors of bode plot
E. Data list. Open the data list of bode plot to view the curve data,
or save the data results to a U-disk or recall it from a U-disk
F. Set the measurement parameters. Parameter measurement of
scanning curve includes upper cut-off frequency (UF), lower
cut-off frequency (LF), bandwidth (BW), gain margin (GM) and
phase margin (PM)
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T3DSO2000A Manual. Page 162
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