> Well .. seems like the picture shows 48 dB makes S-9, or 5 1/3 dB per
> S Unit..... which as I seem to remember back when learning this stuff,
> that 5 point something dB was accepted as the S Unit, even though it
> could -- and would -- vary between manufactures.
Most manufacturers "tried" to use ~5dB as an S-unit, not six.
Six dB was NEVER an industry standard, as a matter of fact there
never was any industry standard by any sense of the true meaning of
Almost no receivers, except a few DSP based systems, are linear and
hold the same dB/S unit over the low end of the scale...although many
are reasonably close to 3-6dB per S-unit near the middle of the
73, Tom W8JI