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Comparing USB dongles. Sideband noise on 144 MHz.
Strong signal OFF Weak signal OFF RMS signal levels in 1 kHz bandwidth on 143.5 MHz about 550 kHz below the frequency of the strong signal. E4000 38.26 dB MSi001 24.34 dB R820T 41.67 dB FC0013 40.38 dB | |