Unknown Signal Type Seen with Cocoa Modem

[N1RPN]

Hi, I'm N1RPN and I'm learning to run RTTY using Cocoa Modem 2.0 running on a Mac G4, and Icom 720a and a 40 meter dipole.

But I see in the Wideband RTTY waterfall display a signal that appears as 3 signals side by side and interesting Lissajous patterns in the tuning display. Any idea what this is?

73 N1RPN

[KG4NEL]

https://imgflip.com/s/meme/Ancient-Aliens.jpg

[NQ6U]

Post a screen shot--command-shift-3

[KC2UGV]

Post a screen shot--command-shift-3
^^^That

Kinda hard to tell from a verbal descript.

[N1RPN]

Does this help?

15044
`

[N1RPN]

And from the same transmission but later.

AA1OH doesn't recognize the sound and he's good.

15045

[KG4CGC]

Gibberish being caused by your connections between the radio and computer. Try ferrite beads and or better shielded cables to keep out interference.

[WØTKX]

The Lissajous Crown of Thorns

[N1RPN]

Nice watch you got there KG4CGC, but FWIW this is the system that I use to make RTTY contacts, read PSK and receive HF Weather Fax transmissions. This weekend past, after I screwed up my courage to put my hat on a stick, poke it around the corner and try a live CW contact, I used this system to tell me that buzzing I hear everywhere was 50 WPM CW evenly spaced about 1KHz apart. 73 N1RPN.

[KG4CGC]

Join us in general chat for a drink.

OK, if that's not it then that's all I got. I had a similar issues in psk and sorted it better interface cables.

[N1RPN]

Join us in general chat for a drink.

OK, if that's not it then that's all I got. I had a similar issues in psk and sorted it better interface cables.

That's FB KG4CGC. Thanks for the help. 73 N1RPN

[N8YX]

Have an audio clip of the transmission?

[N1RPN]

Strangely enough, yes I do. For an amateur radio forum you think there'd be a way to attach an audio file. But I can't find it.

So, here we go:

http://arts-attic.com/blog/?p=1532

[kb2vxa]

I don't think, I know, so I'm telling you how it's done. First make sure the file isn't too large (check limits when attaching file) and zip it. Click on "go advanced", click on "manage attachments" and upload it, easy peasy. Please don't ask how I got the file and processed it for uploading, if I tell you then I'd have to shoot you.

[KC2UGV]

Sounds like power supply noise to me.

[WØTKX]

Maybe. I'm wondering if it shows up on other frequencies. In other words, multiple spots.

Also wondering if it "crawls" slowly in frequency over time.

[N1RPN]

Maybe. I'm wondering if it shows up on other frequencies. In other words, multiple spots.

Also wondering if it "crawls" slowly in frequency over time.

This has been at 7.042 MHz for at least two weeks. I watched what I assume to be a QSO this afternoon trying to tape a good sample, but I kept missing the start tone and the audio tape with the end tone and a couple of back and forths came in at around 10 MB in length and I chose not to burn that much satellite time.

[WØTKX]

Strangely enough, yes I do. For an amateur radio forum you think there'd be a way to attach an audio file. But I can't find it.

So, here we go:

http://arts-attic.com/blog/?p=1532

http://www.udxf.nl/