7 Test Sequence Application
346 Keysight U8903B User’s Guide
Stepped frequency sweep
Stepped sweep is an audio testing method where one parameter is swept across a range of
values while one or more other parameters are measured. The stepped frequency sweep
measurement provides a sine wave stimulus signal that is moved across a range of
frequencies in a specified number of points. The DUT output is acquired by the analyzer and
the results are displayed on an X-Y graph, with the generator frequency on the X-axis and
the measured results from the DUT on the Y-axis (AC Level, Gain, Phase, THD Ratio, THD
Level, THD+N Ratio, THD+N Level, and SINAD).
Refer to “Measurement Results” on page 399 for more information on the respective result
menu page. Auto ranging is not supported for the phase result. Use the arrow keys to
navigate through the respective tabs and to display the menu page.
Signal generation
The stepped frequency sweep signal generation settings menu page is displayed as shown
in Figure 7-37.
Figure 7-37 Stepped Frequency Sweep > Signal Generation settings menu page
This measurement requires a closed-loop configuration in which both the generator and
the analyzer are used in the test setup. If None is selected for the output configuration
channel, this measurement is unavailable.
The signal generation is disabled if None is selected for the output configuration channel.
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