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Thread: Unknown Signal Type Seen with Cocoa Modem

  1. #1
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    Unknown Signal Type Seen with Cocoa Modem

    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

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    Jim
    The machine does not isolate us from the great problems of nature but plunges us more deeply into them. - Antoine de Saint-Exupéry



  3. #3
    Pope Carlo l NQ6U's Avatar
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    Post a screen shot--command-shift-3
    All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.

  4. #4
    Orca Whisperer
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    Quote Originally Posted by K6BSO View Post
    Post a screen shot--command-shift-3
    ^^^That

    Kinda hard to tell from a verbal descript.
    Big Giant Meteor 2020 - We need to make Earth Great Again

    http://www.coreyreichle.com

  5. #5
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    Does this help?

    Good1.jpg
    `

  6. #6
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    And from the same transmission but later.

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

    Good3.jpg

  7. #7
    "Island Bartender" KG4CGC's Avatar
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    Gibberish being caused by your connections between the radio and computer. Try ferrite beads and or better shielded cables to keep out interference.

  8. #8
    Whacker Knot WØTKX's Avatar
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    The Lissajous Crown of Thorns
    "Where would we be without the agitators of the world to attach the electrodes
    of knowledge to the nipples of ignorance?" ~ Professor "Dick" Soloman



  9. #9
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    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.

  10. #10
    "Island Bartender" KG4CGC's Avatar
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    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.

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