A signal at -30db of background is really quiet! That particular frequency must be really clean, or do you mean the noise at 7MHz?
Discussion
Look into QRP, alot of modulation protocols for extreme weak-signal
A signal at -30db of background is really quiet! That particular frequency must be really clean, or do you mean the noise at 7MHz?
Look into QRP, alot of modulation protocols for extreme weak-signal