Unknown 446
 | |
|---|---|
| Frequencies | 446 MHz |
| Frequency Range | 446 MHz - 446 MHz |
| Mode | USB |
| Modulation | — |
| ACF | — |
| Bandwidth | 0 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 RTTY?). 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 IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample.
Link to original IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. 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 SSBSingle-sideband modulation mode). Note the carrier and multiple sidebands that are duplicates of each other.
