[aprssig] FW: Tuning a TNC
Stephen H. Smith
wa8lmf2 at aol.com
Tue Aug 24 12:24:55 CDT 2010
On 8/24/2010 9:45 AM, Robert Bruninga wrote:
> With today's sound cards in every PC, surely there is a free
> O-Scope display. If so, then there is no excuse for any ham to
> not use this tool for cleaning up some of the trash we see on
There is a very simple and FREE app for this on my website.
Go to <http;//wa8lmf.net/miscinfo>
Scroll down the list of downloadable stuff and look for WaveTools.exe
Right-click and download this self-extracting archive of 4 audio applets for
your sound card.
Four separate small programs turn your sound card into a dual-trace audio scope
-or- a sine/triangle/square-wave audio generator -or- a volume-unit meter -or-
an audio spectrum analyzer switchable between a linear and log scale.
Note that the dual-trace scope function requires that you have a stereo input
sound system -- most computer MIC inputs are MONO. If the machine has a LINE
level input, it will be stereo. Or use the inexpensive USB-connected "iMic"
external audio system described here:
which provides a stereo low-level MIC input.
I've used WaveTools in the field with my mobile laptop connected to the
mini-DIN "data" jack output of my D700's discriminator output many many times
to troubleshoot packet audio issues.
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