Unknown 405p822

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Unknown 405p822
Unknown 405p822 Waterfall.PNG
Frequencies 405.822 MHz
Frequency Range 405.822 MHz - 405.822 MHz
Mode FM
Modulation Unknown
ACF
Bandwidth 1.5 kHz
Location Brisbane, Australia
Short Description Obvious bursts, unknown modulation. Long burst heard every 5-10 seconds on average. IQ file in description. First thought is some kind of trunking, as it is very close to the band where trunking radio is usually seen.
I/Q Raw Recording
Audio Sample

Obvious bursts, unknown modulation. Long burst heard every 5-10 seconds on average. 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. file in description. First thought is some kind of trunking, as it is very close to the band where trunking radio is usually seen.

Modulation is not obvious when FMFrequency Modulation demodulated bursts viewed in Audacity.


Check http://www.sigidwiki.com/wiki/Digital_Mobile_Radio_(DMR), Half slot TDMATime Division Multiple Access sample.

EDIT: I haven't been able to get DMR to decode, and it doesn't seem as evenly spaced as slotted DMR.

slotted DMR

EDIT : Try tetra.


--Cartoonman (talk) 05:13, 22 January 2016 (NZDT)

















Samples[edit]


IQ File

Frequencies[edit]

Found on 405.822MHz.