[Scan-DC] Measuring one and two tones

[mike agner]

Yesterday, Alan wrote:
====================================================
There was a program that would decode the audio frequency.  I think it 
was counter.exe.

Maybe Mike Agner can help us with the link?  I couldn't find it.

Is there something better we can use to decode single and two-tone 
signaling?
=====================================================

Many folks that I know that want to measure tones use the free multi 
platform package Audacity. And AFAIK, some of the scanner groups on 
Yahoo have
counter.exe in their files area.

Anyway, this link into the RR Wiki should help

http://wiki.radioreference.com/index.php/Fire_Tone_Out

It's important to note 2 things;

a. Soundcards aren't particularly accurate as, say, a lab measurement 
instrument. Being consumer in nature, their alignment can and likely 
does vary from unit
to unit. If you can dig up the alignment procedure for your soundcard, 
it would certainly be a little more accurate, but keep in mind, we are 
dealing with a consumer
unit here. There will be a degree of error inherent in any such measurement.

b. Although Uniden scanners are the only ones set up to react to FTOs, 
any scanner or even a receiver (i.e. R7000, R2500) can be used to 
receive them and be
used as a signal source.

Mike