Strange Digital Signal

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Strange Digital Signal
Waterfall451.4875.png
Frequencies 451.4875MHz451,487,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
451,487.5 kHzKiloHertz (kHz) 10^3 Hz
Frequency Range 451487500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).451,487.5 kHzKiloHertz (kHz) 10^3 Hz
451.488 MHzMegaHertz (MHz) 10^6 Hz
451487500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).451,487.5 kHzKiloHertz (kHz) 10^3 Hz
451.488 MHzMegaHertz (MHz) 10^6 Hz
Mode NFMNarrowband Frequency Modulation
Modulation
Bandwidth 10KHz10,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.01 MHzMegaHertz (MHz) 10^6 Hz
10 kHzKiloHertz (kHz) 10^3 Hz
0.01 MHzMegaHertz (MHz) 10^6 Hz
10 kHzKiloHertz (kHz) 10^3 Hz
0.01 MHzMegaHertz (MHz) 10^6 Hz
Location Halifax, Nova Scotia, Canada
Short Description
I/Q Raw Recording
Audio Sample

I'm identified your signal! Its DMR signal. The DMR repeater is "resting burst" then there is some voice or data transmission too.