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Hi, Daniel,

My first post here also as I just found the list. I strongly recommend a tinySA or nanoVNA H4. Just make sure you don't get a clone. So check the [email protected] list for legit sellers. Erik designed both. They produce a square wave (Si5351), so you need a low pass filter for the band of interest. A 3 element Cauer will suppress all harmonics by -50 dBc or better.

The photo shows a pair of tinySAs, one as a sweeper and the other as an SA using peak hold. The filter was designed for 40 m. You can get similar results for filters using a nanoVNA H or one of the quality variants. Erik's nanoVNA H4 has the advantage that you can also load FW to do phase and frequency analysis and a larger screen.

The particular tests you want to make and your current T&M kit make a proper answer difficult. If you don't have a VNA, which I'd expect to be the case as you are seeking a sweeper without mentioning use case, you absolutely should buy a nanoVNA H or H4.