Reply To: SM200C noise at lower frequencies

Thank you for the sanity check. Tossing a 50ohm load on the antenna port shows a spectrum like one would expect (the lower band is much quieter and is just some noise like the rest of the spectrum).

I do want to investigate the pre-selector option you mention though, as I can still see an increased noise floor from DC to ~640MHz (maybe ~5dB).

Thanks