A pulse occurs when modifying parameters ( frequency, duty cycle, etc. ) under burst mode of 33500B series function generator

Frequently Asked Questions (FAQs)

Summary

Explain why there is a pulse when modifying parameters ( frequency, duty cycle, etc. ) under burst mode of 33500B series function generator.

Question

Why is there a pulse when modifying parameters ( frequency, duty cycle, etc. ) under burst mode of 33500B series function generator?

Answer

When setting up a Burst measurement, there is a pipeline of setups that are created to generate the burst. These include all the parameters, such as Waveform characteristics (Frequency, Amplitude, Offset, etc.) as well as Burst characteristics (Count, Start Phase, etc.).   Once Burst is set up and waiting for a trigger, changing some of these parameters requires a re-configuration of the pipeline’s content, which will cause a temporary change in the output.  Changing Frequency and Duty Cycle are two of the main changes that will cause this to occur.
To mitigate this effect, the user could turn the output off, make changes to the waveform characteristics of frequency and duty cycle, then turn the output back on.