Unknown 18p880

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Unknown 18p880
Image.PNG
Frequencies 18.880MHz18,880,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
18,880 kHzKiloHertz (kHz) 10^3 Hz
Frequency Range 18880000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).18,880 kHzKiloHertz (kHz) 10^3 Hz
18.88 MHzMegaHertz (MHz) 10^6 Hz
18880000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).18,880 kHzKiloHertz (kHz) 10^3 Hz
18.88 MHzMegaHertz (MHz) 10^6 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation Unknown
Bandwidth 2700KHz2,700,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
2.7 MHzMegaHertz (MHz) 10^6 Hz
2,700 kHzKiloHertz (kHz) 10^3 Hz
2.7 MHzMegaHertz (MHz) 10^6 Hz
2,700 kHzKiloHertz (kHz) 10^3 Hz
2.7 MHzMegaHertz (MHz) 10^6 Hz
Location Brisbane, Australia
Short Description Obviously not data, but likely something. My guess would be something like a buoy.
I/Q Raw Recording
Audio Sample

Description[edit]

Obviously not data, but likely something. My guess would be something like a buoy.

Take a listen to it in LSBLower Side Band Modulation/AMAmplitude Modulation, the carrier next to it seems to suggest a possible ssb voice channel. Regardless, an odd signal to see and hear. reminded me of Distress Radiobeacon (Analog). --Cartoonman (talk) 05:37, 16 January 2016 (NZDT)

Pretty sure that was just a shortwave AMAmplitude Modulation station that was nearby, and was not part of the signal. The6P4C (talk) 22:34, 16 January 2016 (NZDT)

Hmm, I agree with you. Hard to tell what it is though, could very well be a buoy of some sort or even some rf noise made by a machine or device. --Cartoonman (talk) 13:53, 17 January 2016 (NZDT)

Looks to me like the Vietnamese siren jammer. See this recording on YouTube. --Kj6psg (talk) 20:46, 24 February 2016 (NZDT)

I have cross-checked this with your example and I can pretty confidently say that this is the Vietnamese siren. Thanks for your id Kj6psg. --Cartoonman (talk) 04:28, 26 April 2016 (NZST)

Samples[edit]

IQ File (HDSDR format)