Unknown 446

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Unknown 446
Unknown446 Waterfall.jpg
Frequencies 446MHz446,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
446,000 kHzKiloHertz (kHz) 10^3 Hz
Frequency Range 446000000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).446,000 kHzKiloHertz (kHz) 10^3 Hz
446 MHzMegaHertz (MHz) 10^6 Hz
446000000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).446,000 kHzKiloHertz (kHz) 10^3 Hz
446 MHzMegaHertz (MHz) 10^6 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation
Bandwidth 0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description I've found a strange signal on 446 MHZ Band in Italy, it seems like a multi channel signal (maybe RTTYRadio TeleTYpe?). I'm attaching an image and a 2 seconds IQ sample.
I/Q Raw Recording
Audio Sample

Description[edit]

I've found a strange signal on 446 MHZ Band in Italy, it seems like a multi channel signal (maybe RTTYRadio TeleTYpe?). I'm attaching an image and a 2 seconds IQ sample.

Link to original IQ https://mega.co.nz/#!WphxFT6I!Mx9rv6tTnGARfFOebK2463phVY73ILOS5NfUB3vNSQk

Audio Sample[edit]

Sample recorded on USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) mode.

Hypothesis[edit]

Looks like it could be RTTYRadio TeleTYpe via NFMNarrowband Frequency Modulation (instead of the normal SSB mode). Note the carrier and multiple sidebands that are duplicates of each other.