Noise over all HF bands

From Signal Identification Wiki
Jump to: navigation, search
Noise over all HFHigh Frequency (3-30 MHz) bands
Location Estonia, Viljandi
Short Description Strange noise that starts middle of a day and ends in the evening. All HFHigh Frequency (3-30 MHz) bands are almost covered ( after 17MHz it starts to fade) clearly are visible harmonics.
I/Q Raw Recording
Audio Sample
Deletion Request Abstained for the following reason: Currently we are piloting a category of RFRadio Frequency emissions called 'Interfering Emissions'. It's aimed at identifying sources of RFRadio Frequency interference, such as USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) clocks and machinery, and offering information on what frequencies they are found in, what they look like, and what causes them. It is duly noted that this doesn't constitute a 'signal' per say, and that's a back-end problem that I haven't gotten around to addressing. It is likely that in the future I will just remove these types of entries from the 'Signal' category and have them solely in their own 'Interfering Emissions' category. --Cartoonman (talk) 06:19, 4 April 2016 (NZST)

or possibly make a "recognizing and determining if signal is external interference guide" so that maybe less false positives and erroneous samples are submitted ?--Mbeam (talk) 06:41, 4 April 2016 (NZST)

I'm not entirely sure if such a guide would work since there are signals that don't transmit any data but are still man-made and are purposefully transmitted, such as radars and ionosondes. I'm not sure if i'd consider those as external interference (although radars often do interfere with normal communication signals). It's definitely something to debate. --Cartoonman (talk) 05:20, 6 April 2016 (NZST)

Possible Plasma TV Interference. --Cartoonman (talk) 16:56, 4 February 2016 (NZDT)