How is pulse mode useful in a noise generator?

[elroy]

Based on a recommendation, I'm looking at obtaining one of these broadband noise generators for use evaluating RF filters in conjunction with an SDR:

https://g8fek.com/noise-gen.html

Because I work with LF/VLF gear, my first thought was to go with the BBGen+ model, which covers down to 20 kHz.

The only thing I'm stuck on is that I see the BBGen-pulse model includes a 5 Hz pulse mode.

I doubt that I would need or use it, but how is a pulse mode useful in a noise generator? How is it typically used?

[tggzzz]

To distinguish noise from the noise source from other noise.

[elroy]

Thanks!