Unknown Ringing

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Unknown Ringing
UnknownRinging Waterfall.jpg
Frequencies 154.646 MHzMegaHertz (MHz) 10^6 Hz154,646,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
154,646 kHzKiloHertz (kHz) 10^3 Hz
Frequency Range 154646000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).154,646 kHzKiloHertz (kHz) 10^3 Hz
154.646 MHzMegaHertz (MHz) 10^6 Hz
154646000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).154,646 kHzKiloHertz (kHz) 10^3 Hz
154.646 MHzMegaHertz (MHz) 10^6 Hz
Mode NFMNarrowband Frequency Modulation
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 Repeats every minute.
I/Q Raw Recording
Audio Sample

Description[edit]

Repeats every minute.

I've heard this where I live, the frequency here is listed as belonging to an agency using encrypted P25 Phase 1. --Distribute (talk) 03:16, 12 January 2016 (NZDT)

Could we get an 16-bit IQ sample of this? The ftt waterfall here is rather low and doesn't show the details of it. --Cartoonman (talk) 05:41, 12 January 2016 (NZDT)

I can detect this signal from Central Florida on 154.46375 MHzMegaHertz (MHz) 10^6 Hz. According to FCC License searches, the frequency is allocated to several power companies across the state. A Google search led me to this document: http://ipu.msu.edu/library/pdfs/publications/Energy%20and%20Communications%20in%20Transition%20(1981).pdf Starting on page 81 of that PDF it talks about using radio communications for electric grid load management, with the quote, "Currently, one frequency, 154.46375 MHzMegaHertz (MHz) 10^6 Hz, is authorized by the FCC exclusively for load management use." It also mentions that it's using FSKFrequency-Shift Keying modulation for encoding the data.

Here's a link to a 50MB zipped raw IQ: https://drive.google.com/file/d/0BxsZY02DGumYcDVPdTh0Y1lpZHM/view?usp=sharing

--Drunkatgt (talk) 05:22, 20 February 2016 (NZDT)