S-points for frequencies below 30 MHz

Signal
strength
Relative
intensity
Received
voltage
Received power
(Zc = 50 Ω)
S1 –48 dB 0.20 μV –14 dBμV 790 aW –121 dBm
S2 –42 dB 0.40 μV –8 dBμV 3.2 fW –115 dBm
S3 –36 dB 0.79 μV –2 dBμV 13 fW –109 dBm
S4 –30 dB 1.6 μV 4 dBμV 50 fW –103 dBm
S5 –24 dB 3.2 μV 10 dBμV 200 fW –97 dBm
S6 –18 dB 6.3 μV 16 dBμV 790 fW –91 dBm
S7 –12 dB 13 μV 22 dBμV 3.2 pW –85 dBm
S8 –6 dB 25 μV 28 dBμV 13 pW –79 dBm
S9 0 dB 50 μV 34 dBμV 50 pW –73 dBm
S9+10 10 dB 160 μV 44 dBμV 500 pW –63 dBm
S9+20 20 dB 500 μV 54 dBμV 5.0 nW –53 dBm
S9+30 30 dB 1.6 mV 64 dBμV 50 nW –43 dBm
S9+40 40 dB 5.0 mV 74 dBμV 500 nW –33 dBm
S9+50 50 dB 16 mV 84 dBμV 5.0 μW –23 dBm
S9+60 60 dB 50 mV 94 dBμV 50 μW –13 dBm
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