David Yarnes wrote on Wednesday, June 11, 2008 4:42 PM
A readability "1" report clearly states that you are "unreadable".
Accordingly, I would assume that a strength "1" report is intended to
convey that signal strength is so low as to preclude any significant
degree of readability. In other words, real communications only occurs at
the "2" level for both reports.
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I believe that you are right if the signal strength report is not given in
terms of 'S' Units. On the other hand, assuming 6db per S unit and S9 being
50 uV input across 50 ohms, a S1 signal can usually be perfectly readable in
the absence of stronger QRM or QRN even on 40m. The use of 'S' units to
report received signal strength becomes of questionable value IMO in those
cases where good or perfect copy of a signal several db below a S1 noise
level is possible by using the filter between the ears.
73,
Geoff
GM4ESD
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