 Do you hear that sound? That weird signal
that sounds sort of like a fish farting, sort of like the
Chevy when it wouldn't start. What the heck is that! They crop up all over the shortwave
spectrum. No sooner do we categorize and name them (not decode them, oh, no, not a
chance) than an entire new bunch rears up.They sometimes seem to outnumber the
recognizable digital signals.
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If you know of these systems,
or have mysteries of your own to be listed, please contact
me!
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Click on the frequency for the
analysis page
| Frequency
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General
Description |
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FSK, 125 Baud, 380 shift
(apparently not ARS-ARQ) |
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200 Baud FSK, in 3 channel widely
spaced FDM |
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Sounds like a high speed fax, but
what is it really? |
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MFSK, 4 tone, aggregate baud rate
195.5. |
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2400 Baud PSK, Phase plane image,
and others |
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Buzzing Sound, Probably a new type
of HF modem. Updated. |
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Sliding tone (similar to fax
signals). |
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The FACE OF ELVIS embedded in a
phase modulated signal!! |
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The Hoka Code30 was
used to perform analysis and receive these signals. Information is available at Hoka, and at Computer Aided Technologies.
Information on most digital signals can be found in the Digital Signals FAQ. |
 Luca Barbi, the president of the Italian Hoka dealership, has an
interesting site offering analysis of standard RTTY modes. The descriptions are in
Italian, but the images and data are easily understood by anyone who speaks
"RTTY." New!
Hidden PSK signals discovered on langwave! |
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