Bode Plot
The 2560B 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 a BK Precision series arbitrary 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, the markers on the chart can be moved to see the gain and phase values measured at
each frequency point. The scale and offset settings can be adjusted for the amplitude and phase plots.
To enable the
Bode Plot
function:
1.
Touch
Analysis > Bode Plot
to display the bode plot menu.
2.
The
Bode Plot
menu will be displayed.
3.
Touch
Bode Plot
to toggle the bode plot on and off.
4.
Touch
Configure
to configure the bode plot.
–
The bode plot configuration includes the DUT, AWG connection, and
sweep parameters
5.
Touch
Operation
to toggle the bode plot operation on and off.
6.
Touch
Display
to configure the display parameters.
–
The display parameters include the coordinate axis of bode plot, trace
visibility display, and cursors of bode plot. (See section
for more details)
7.
Touch
Data
to open the data list of bode plot to view the curve data
–
Save the data results to a U-disk or recall it from a U-disk.
8.
Touch
Measure
to 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)
Figure 20.1
Bode Plot
Menu
