Hi Maybe narrow band stuff like low data rate PSK
Bob On Sep 19, 2010, at 1:59 PM, jimlux wrote: > francesco messineo wrote: > >>>> It's hard to explain why to ones not familiar with weak signal >>>> operation between broadcasting signals, but really the noise floor >>>> raise a lot when you have some 5 or 6 broadcasts signals in 500 KHz of >>>> band (all with power levels of at least 10 dB more than the levels >>>> used in amateur radio, often +20 dB more) >>> I would need some more fundamental understanding of the system and needs >>> to be able to understand how you come up with the above noise level at >>> 100 Hz. >> as I said, if it's not possible or not practical, of course I'll take >> what I can get. The receiver will be limited by its phase noise and >> not for example by its IMD3. >> I think already -110 dBc/Hz at 100 Hz is better than any LO in >> commercial receivers (for ham radio at least). >> > > But why at 100 Hz offset. Are you looking for weak signals 100 Hz away from > the strong interferer? (and are worried about reciprocal mixing from the LO) > That would imply that the interferer has equally good phase noise, and that's > not particularly likely? > > If you want to be a good spectrum citizen and have a real clean > transmitter... (or you're doing some experiment where you are doing some > sort of radio science, and need a clean, clean tx) > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
