What is the difference between calibration points on the S meter display?
VOAProp uses 6dB per S-point. The readings are converted from the received signal levels forecast by VOACAP, which are -150dbW for S1, to -100dbW for S9. Most amateur radio receivers, using an AGC feedback voltage derived S-meter, have meters that are very non-linear, often as little as 3dB per S-point in the S2 – S9 region.
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