Agreed - I think Erik has covered noise pretty well and I'll be sure to follow his video and warnings (especially total power). This seems like the best approach using the Ultra.
Thanks for the note about a slow sweep and max hold. I hadn't thought of that.
I haven't gotten around to getting a nanoVNA yet. Maybe?it's time! It's definitely on my wish list.
Can the tinysa ultra be used with a tracking generator or in some other swept mode?
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I see the video for the tinysa. Also I see the ultra has an "LO" checkbox. Would one use that LO out to drive a mixer or does the ultra accept an external LO?
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I'm interested in sweeping a filter. I've seen the noise-generator based method so perhaps that's the best approach.