I¡¯ve seen these band-munching monsters. On FT8, we have almost no way of telling offenders that their signals are bad.?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
On Sun, Mar 31, 2024 at 19:31, Jim Shorney <
jimNU0C@...> wrote:
That's a great picture Rob! I've seen signals like that (the square one) on the bands. I've also seen horrible signals. The FT8 segments are often awash in distortion products during busy times with good prop. When I hear something that sounds wide I go to great pains to make sure is is not my TR7 or R7A causing it. I have a fellow about a mile and a half from me who runs a Kiwi SDR that has good ears, plus I have bookmarked several, both Kiwi and other, around the country that hear fairly well. It is amazing what you see when you surf the bands.
73
-Jim
NU0C
On Sun, 31 Mar 2024 21:01:52 +0000
"Rob Sherwood" <rob@...> wrote:
> Hi Rick,
>
> Until the advent of direct sampling radios, or at least direct sampling band scopes (TS-890S), informing a station of his excessive transmit bandwidth was blamed on my receiver. Now what we see on the generic term SDR radios is reality whether the offending ham wants to believe it or not.
>
> If the signal to noise ratio is good enough, today we can easily see splatter or key clicks down 50 dB. That is where PureSignal or Icom DPD shines with signals that are virtually rectangles on both the scope and the waterfall. Here is an example of what PureSignal with an Apache looks like vs. a typical rig, in this case my TS-890S.
>
> [cid:image001.png@...]
>
> Rob, NC0B
