Unusual pulsing signal on 20 meters

[KG0MN]

I found out what the mystery signals are. Ifr you download a program called EZPAL you will find out that it is a Slow Scan signal and you need the EZPAL program to decode it. It is rather odd since the waterfall displays you callsign before you see the finished product. Also the picture does not slowly appear it , it is only displayed after the picture is finished.


http://www.kc1cs.com/EasyPal-28-JAN-2012-Setup.exe

 

[Bison1]

I found out what the mystery signals are. Ifr you download a program called EZPAL you will find out that it is a Slow Scan signal and you need the EZPAL program to decode it. It is rather odd since the waterfall displays you callsign before you see the finished product. Also the picture does not slowly appear it , it is only displayed after the picture is finished.


http://www.kc1cs.com/EasyPal-28-JAN-2012-Setup.exe

Thanks for your response. I'd not heard of EZPAL before. It must be quite rare. Took a good deal of hunting to find a site with a wav file of the sounds such signals make over the air. I listened to this and found that the sound is a steady whirring, which is not surprising in a digital mode. These tend to give out noise-like sounds in their un-decoded forms. The signal I have been hearing on 14.320 MHz does not sound like this. It is a series of audio tone pulses, first in one consistent frequency for a time, then in another. I heard the signal again yesterday afternoon and looked at it on the O-scope. The tones each appear to be a simple sine wave. K3DCW has a wav file of an EZPAL signal at: http://www.k3dcw.net/index.php?p=1_4_Digital-Mode-Samples

 

[KG0MN]

EZPAL has numerous different sending modes and I am far to new at the program to know if that would cause a different audio tone to be generate or not I will hook my scope up the rig while I send a series of different modes and see if there is a pronounced difference in tones or wave forms sent with each one.

 

[Bison1]

None of the explanations offered so far, for the unidentified signal on 14.320 MHz seem to be a good fit for what has actually been heard. That, and the persistence of the signal over a period of at least 7 weeks seem to mark it out as something unusual. The signal now appears more likely to be heard from 22:30 to 01:15 UT, than at the earlier times noted before.

 

[hookedon6]

I found out what the mystery signals are. Ifr you download a program called EZPAL you will find out that it is a Slow Scan signal and you need the EZPAL program to decode it. It is rather odd since the waterfall displays you callsign before you see the finished product. Also the picture does not slowly appear it , it is only displayed after the picture is finished.


http://www.kc1cs.com/EasyPal-28-JAN-2012-Setup.exe

EASYPAL (correct spelling) is not "rare" at all, 14.233, 7.173, 3857 ect.

the waterfall display will also properly display on many FSK type programs, any good PSK program will also decode the waterfall info,

EASYPAL actually transmits "pictures" in numerous formats .mpg, .rs, .ect.

the waterfall is a .WAV file.

the easypal QRM being sent on 14.313 is being sent by the "crazy" guy in Kalamazoo^can not stand it^

 

[Bison1]

Listened on 14.233 MHz a good deal since yesterday afternoon. Heard the weird and wonderful variety of 'tweedling' and warbling sounds characteristic of most SSTV systems. Also occasionally heard the steady whir I now associate with the EasyPAL system. Heard nothing, though, that resembles the signal I and others have heard on 14.320 MHz