Unknown 409

From Signal Identification Wiki
Jump to: navigation, search
Unknown 409
Unknown 409.jpg
Frequencies 409.6 MHzMegaHertz (MHz) 10^6 Hz409,600,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
409,600 kHzKiloHertz (kHz) 10^3 Hz
Frequency Range 409600000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).409,600 kHzKiloHertz (kHz) 10^3 Hz
409.6 MHzMegaHertz (MHz) 10^6 Hz
409600000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).409,600 kHzKiloHertz (kHz) 10^3 Hz
409.6 MHzMegaHertz (MHz) 10^6 Hz
Mode NFMNarrowband Frequency Modulation
Modulation PSKPhase-Shift Keying
Location Worldwide
Short Description Unknown chirping like sound. Has BPSKBinary Phase-Shift Keying (1 bit per symbol) modulation, ~600 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.
I/Q Raw Recording
Audio Sample

Description[edit]

Unknown chirping like sound. Has BPSKBinary Phase-Shift Keying (1 bit per symbol) modulation, ~600 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.

User suggests "Unknown 409 is probably APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area / AFSKAudio Frequency-Shift Keying decodeable with http://sourceforge.net/projects/qtmm/files/ at FMFrequency Modulation mode" Doubtable since PSKPhase-Shift Keying, but could try. --Cartoonman (talk) 08:50, 30 December 2015 (NZDT)

Link to IQ file: https://www.dropbox.com/s/xr1m8epuf1pt0nt/IQ%20files.rar