Cathy,
With the K3, you can narrow down both the 1st I.F. (crystal roofing
filter) and the DSP (2nd I.F.). This makes for *very* nice CW copy,
even if there are humongous signals outside the passband. You simply
won't hear them.
We also have a CW decoder built in that will either copy and display
the characters on the LCD, or tell you the code speed in WPM. The
decoder also works for PSK31 and RTTY, and you can transmit in these
modes just by sending CW with the keyer paddle (or an attached
keyboard). This eliminates the computer entirely, should you be so
enclined.
73,
Wayne
N6KR
On May 2, 2007, at 8:47 PM, Cathy James wrote:
For relative newbies to CW such as myself, narrow filters
are a necessity. It's all that I can handle to copy code
at 18-20 WPM without the distraction of 2 or 3 other signals
in the passband banging away at my brain. I have noticed
that the real experts in my club often leave the filters
wide open and ignore the ones they aren't working, whereas
I have to narrow it down to at least 700 Hz to get clear
copy, 400 Hz is my default, and it drives me nuts when I go
down to 200 Hz and can *still* hear a second signal in the
passband!
Cathy
N5WVR
---
http://www.elecraft.com
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