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PMU and waveform capture test mode

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CuriousGeorge
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Joined: May 21st, 2011, 4:26 pm
Country: United States

PMU and waveform capture test mode

Post by CuriousGeorge » May 13th, 2020, 12:13 pm

From an ITM and the PMU, in waveform capture mode, the amount of data returned is less than the requested pulse period.
Also, the flat part of the pulse is not as long as as I request in the Width parameter. The rise time and fall times are the correct duration.
How do I make sense of what it is doing?

Andrea C
Keithley Applications
Keithley Applications
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Joined: October 15th, 2010, 10:35 am
Country: United States
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Re: PMU and waveform capture test mode

Post by Andrea C » May 22nd, 2020, 6:36 am

The Pulse Measure Unit (4225-PMU) uses full width half max pulse width definition method:
FWHM_pic1.PNG
FWHM_pic1.PNG (21.17 KiB) Viewed 166 times
ITM Settings:
FWHM_pic2.PNG
FWHM_pic2.PNG (22.74 KiB) Viewed 166 times
Results:
FWHM_pic3.PNG
FWHM_pic3.PNG (39.26 KiB) Viewed 166 times

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