The S meter isn't intended for the guy at the other end. Band conditions and a whole host of other things will affect the signal strength. The S meter is for the operator, it gives him/her something to compare to other signals. Sharing that reading with the guy on the other end is only useful to him if the two (or more) talk on a regular basis or are making a comparison. "The band really sucks tonite, you're only an S7 where you're usually 20 over". "What's better, antenna A or antenna B?"
Vince - K8ZW.
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On 10/29/2020 10:59 AM, Jerry Gaffke via groups.io wrote:
Not that I would bother with an AD8307 on a simple transceiver for an
S-Meter.
Even if properly calibrated from uV at the antenna port, it doesn't
account for
your antenna system or local geography, and so is not that meaningful
for the
station at the far end.
May as well just pick a number somewhere between 9 and 1,
9 if it's the among the strongest signals, 1 if you can't hear it.
Or if you want to promote good feelings, just give everybody you can
copy a 9.
There are plenty of other design issues to obsess with first.
--
K8ZW
