Rich,
I guess I can understand why you would think this (excerp below), but
diversity is as useful for digital as voice/CW. The difference it
you don't copy digital with your ears - you see it on your monitor.
Probably most digital sw do not implement diversity reception but a
couple do: MAP65 implements dual-polarity reception using diversity
mode and very effectively resolves the correct polarity of the
received signal while peaking the signal to match (one other program
called Linrad can do this).
Benefit of diversity reception is not limited to one
bandwidth. MAP65 uses 90-KHz! Digital modes can do this because the
entire RF spectrum (limited by the roofing filter) is digitized by
the DSP in a SDR. DSP then applies digital bandwidth filters to
separate signals. In fact that is how the K3 and K3S do it. But
then later processing demodulates the mode desired (CW, SSB, AM, FM,
DATA). I don't think K3 firmware has implemented diversity Rx for
digital modes, but it could be done (if wanted). More likely it would
be accomplished by special sw in an external computer.
73, Ed - KL7UW
From: Richard Ferch <ve3...@storm.ca>
To: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net>
Subject: Re: [Elecraft] Sub-Rx Filters
----snip
Diversity mode is very useful in CW. It is not useful in digital modes
(unless someone can write software to emulate what the human brain does
with the inputs from two ears). I don't know how useful it would turn
out to be in wider bandwidth modes like SSB, AM and FM - never tried.
----snip
73,
Rich VE3KI
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com
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