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Would it be possible to set up the K3 so that we would have the availability to change the S meter calibration on 6 meters and the transverter bands to conform to the attached standards, it would be nice to have this user selectable in the menu. also it would have to be apply to the P3
Today two references values exist: for frequencies below 30 MHz, S9 is defined as a voltage of 50 uV over 50 Ohms at the receiver antenna connector; for frequencies above 30 MHz, S9 is defined as a voltage of 5 uV over 50 Ohms at the receiver antenna connector. This refers to an unmodulated carrier signal (N0N) that uses almost no bandwidth; in case of real signals using a given bandwidth, this definition may not be enough since a smaller receiver bandwidth allows a weaker minimum detectable signal, but S-points are still a good tool for comparing received signals.
S-points for frequencies below 30 MHz:
Signal
strength Relative
intensity Received
voltage Received power
(Zc = 50 Ohm)
S1 -48 dB 0.20 uV -14 dBuV 790 aW -121 dBm
S2 -42 dB 0.40 uV -8 dBuV 3.2 fW -115 dBm
S3 -36 dB 0.79 uV -2 dBuV 13 fW -109 dBm
S4 -30 dB 1.6 uV 4 dBuV 50 fW -103 dBm
S5 -24 dB 3.2 uV 10 dBuV 200 fW -97 dBm
S6 -18 dB 6.3 uV 16 dBuV 790 fW -91 dBm
S7 -12 dB 13 uV 22 dBuV 3.2 pW -85 dBm
S8 -6 dB 25 uV 28 dBuV 13 pW -79 dBm
S9 0 dB 50 uV 34 dBuV 50 pW -73 dBm
S9+10 10 dB 160 uV 44 dBuV 500 pW -63 dBm
S9+20 20 dB 500 uV 54 dBuV 5.0 nW -53 dBm
S9+30 30 dB 1.6 mV 64 dBuV 50 nW -43 dBm
S9+40 40 dB 5.0 mV 74 dBuV 500 nW -33 dBm
S9+50 50 dB 16 mV 84 dBuV 5.0 uW -23 dBm
S9+60 60 dB 50 mV 94 dBuV 50 uW -13 dBm
S-points for frequencies above 30 MHz:
Signal
strength Relative
intensity Received
voltage Received power
(Zc = 50 Ohm)
S1 -48 dB 20 nV -34 dBuV 7.9 aW -141 dBm
S2 -42 dB 40 nV -28 dBuV 32 aW -135 dBm
S3 -36 dB 79 nV -22 dBuV 130 aW -129 dBm
S4 -30 dB 160 nV -16 dBuV 500 aW -123 dBm
S5 -24 dB 320 nV -10 dBuV 2.0 fW -117 dBm
S6 -18 dB 630 nV -4 dBuV 7.9 fW -111 dBm
S7 -12 dB 1.3 uV 2 dBuV 32 fW -105 dBm
S8 -6 dB 2.5 uV 8 dBuV 130 fW -99 dBm
S9 0 dB 5.0 uV 14 dBuV 500 fW -93 dBm
S9+10 10 dB 16 uV 24 dBuV 5.0 pW -83 dBm
S9+20 20 dB 50 uV 34 dBuV 50 pW -73 dBm
S9+30 30 dB 160 uV 44 dBuV 500 pW -63 dBm
S9+40 40 dB 500 uV 54 dBuV 5.0 nW -53 dBm
S9+50 50 dB 1.6 mV 64 dBuV 50 nW -43 dBm
S9+60 60 dB 5.0 mV 74 dBuV 500 nW -33 dBm
Ed KD7PY ex K7WIA
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