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Author Topic: Digital signal recognition  (Read 795 times)
K3DDX
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Posts: 18




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« on: October 25, 2000, 04:35:30 PM »

Does anyone know where I could find an audio tape of the various digital modes (with identification of mode) heard on HF.  Need this for discussion group with various local hams on signal recognition.
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KB9UMT
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Posts: 414


WWW

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« Reply #1 on: October 25, 2000, 10:16:25 PM »

Denny, not sure if there is a tape to buy (although you might check with the ARRL) but there are numerous websites with the sounds you can download or play on the computer to hear the different sounds of the different modes.  Here are a few you may want to look at and if you do not have a laptop you can take with you one might try to record these sounds from your computer on a regular tape recorder.  

http://det.bi.ehu.es/~jtpjatae/sound/wefax.wav
http://www.lerc.nasa.gov/WWW/MAEL/ag/soundact.htm
http://home.att.net/~k7szl/rtty.wav
http://www.geocities.com/CapeCanaveral/Cockpit/2800/digital/

Hope this helps you.  I have some of these wav files saved on my computer just to remember what sounds are what digital mode as I am scanning through the bands (there are so many anymore I forget at times what they sounded like!).  You may find a tape or maybe someone out there has made one they would lend you but I just use the internet as a "free" source of information and go from there.  73's and good luck on your project de KB9UMT Don
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K3DDX
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Posts: 18




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« Reply #2 on: October 26, 2000, 08:47:48 AM »

Don:  Many thanks, you have the answer. I can download and write to a CD (I have a CD writer) and take along a portable CD player.  Greatly appreciate your help.
73, Denny, K3DDX
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K3DDX
Member

Posts: 18




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« Reply #3 on: October 27, 2000, 06:01:47 PM »

Further to above:  These web sites were extremely helpful, but I still have some signals to find, i.e., PSK31, PACTOR, and AMSAT. I am grateful to Don for his help. Anyone else have any suggestions. Thanks.        -Denny, K3DDX
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KB9UMT
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Posts: 414


WWW

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« Reply #4 on: November 18, 2000, 12:33:24 AM »

I think this link had some more

http://www.teleport.com/~nb6z
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KA3JJZ
Member

Posts: 12




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« Reply #5 on: January 31, 2001, 01:01:13 PM »

 I'm not sure what a mode AMSAT is- typo, no doubt-
but the following link has several examples you
can listen to....except PSK31.  Just tune to
14070.15 anytime the band is open, you'll hear that
without a doubt.

 The URL is:
 http://www.wunclub.com/sounds/index.html

 73s  Mike  ka3jjz@erols.com
 
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K1CRU
Member

Posts: 10




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« Reply #6 on: April 21, 2006, 11:49:46 AM »

Even better, does anyone know of a piece of software that will recognize a digital mode as soon as you tune it on the waterfall?
I use MixW which is a great program, but doesn't auto recognize a mode. You have to select it from a drop down menu.
I'd like to see a piece of software that would flag the mode in a pop-up window when you tune it on the waterfall.
Sound files can be helpful, but the problem is that some modes have options which change their on the air sound (data rate, bandwidth, number of tones, etc).
Anyone know of anything currently available or in the works? I'd even PAY for a program like that!
Frank
K1CRU
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