A FM Band stop Filter would be a good idea to test, VHF should be enough but I would test both options.
Jan | PE0SAT
Looks better with FM bandstop. Can set around 15 db gain in GQRX and get a lot of signals around 433 Mhz now. But still impossible to set any gain at 2m band. The initial noise floor is already very high. Is it possible to set two different gains for 2m and 70cm in docker satnogs-client? reception on 2m is fine at 0.0 to 0.9 db. I can receive local amateur radio and also packet radio and ACARS / VDL2. Thinking about a dual band stop for FM and DAB.
base on this obs, is the second signal is example of what you say as aliasing? i check the raw file and signal is not from terestrial, but same with main signal at center. or this error from rtl software? because the audio recorded is shorter than it should. (indicated by failed status). btw i use RTL-SDR v4, with samp-rate-rx: “3.2e6”
