I believe it is the TX side. Here's why:
The SoftRock series of SDR kits are fun for looking at this. The
receiver is extremely wide, on the order of 50KHz to 100KHz, depending
on your version and sound card quality, so there really isn't anything
analogous to the filtering artifacts you might see (though of course you
can run out of dynamic range). At least I think this is the case.
I have a SoftRock 40 and the Rocky software (sadly Windows only) offers
a large waterfall display.
You can read the CW as it scrolls horizontally. I see some signals with
clicks, which show up as vertical bars on the CW signals, and some
without. The vertical axis is frequency extent, so you can see just how
wide they are, at a glance.
Recent versions of the Rocky software include a visual key-click filter,
which you can to turn on to clean up the waterfall.
Leigh/WA5ZNU
On Tue, 30 May 2006 8:09 am, Brendan Minish wrote:
On Tue, 2006-05-30 at 10:10 -0400, Darwin, Keith wrote:
Hey folks,
I noticed with one of these stations, I could
hear "clicks" up and down the band for +/- several KHz. I though he
had
key clicks. Then I found a 2nd signal that produced the same results.
Then a 3rd and a 4th. I suppose it is possible that all of them had
issues with key clicks but it is also possible that I've hit a limit
in
the K2's ability to handle strong signals close in.
Some popular rigs in use by contesters (in particular the 1000MP
series)
have very bad keyclicks unless modified
http://www.w8ji.com/keyclicks.htm
Unfortunately it is not uncommon at all to hear bad keyclicks during
major contests
The K2 receive performance is certainly up to contesting, I use my K2
in
preference to my 756PRO2 for CW contesting as it hears better
.brendan EI6IZ
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