Unknown 18p880

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Unknown 18p880
Image.PNG
Frequencies 18.88 MHz
Frequency Range 18.88 MHz - 18.88 MHz
Mode USB
Modulation Unknown
ACF
Bandwidth 2.7 MHz
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)