Phil,
It just shows how effective DSP in the IF circuits can be. I'll bet it
doesn't work nearly as well in the audio chain.
Steve
----- Original Message -----
From: "Phil Scovell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, May 01, 2009 13:05
Subject: Another DSP Experience
> So the other night on 40 meters, the thunder storms over the planes were =
> killing the band. I often listen to a couple of high speed guys for =
> practice because when they are in contact, they normally run 45 to 60 =
> words per minute. They often hang out on 7032 if you are interested =
> using W4NPX and W6WXZ for call signs. This particular evening, both the =
> Florida station and the Californian were running strong 10 over S9 =
> signals but so was the peaks from the static crashes. At high speed CW, =
> fade, QSB, or sudden static, QRN, can take out two or three words so the =
> louder, the better. I was copying them both fine but the static crashes =
> were wiping out several letters and words at a time. Just for fun, I =
> snapped on the DSP. The static crashes were all but gone and I no =
> longer was missing anything as before. Years ago, when running a 2 =
> element 40 meter beam at 70 feet, summers, beaming east, were killers. =
> I soon learned, if I didn't want to listen to all those static crashes, =
> I could beam to the west, reducing the static crashing by about 20 DB, =
> and work western stations just fine. The DSP works, for CW signals at =
> any rate, way better that I thought it would.
>
> Phil.
> [log in to unmask]
>
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