Talk:Weird moving signal

I had a similar signal but it was located at 1.15Ghz. I was able to trace it to a nearby desktop computer emitting this noise. I would check to see if it's RFRadio Frequency noise from a device.

This is what I had:

It may also be from a dead satellite or space debris given your QFH antenna.

Probably a parasitic signal.

Maybe this is an unwanted signal from a radio transmitter. Also this could be local noise from computer's internal components.

Probably a parasitic signal. - #2

I agree with the above, this must be a local noise from the computer. I was bothered by the same mystery and it just disappeared when I swapped my old PC for a new laptop. --94.254.242.154 23:32, 3 April 2016 (NZST)

Probably An Old Telemetry System.

This signal bears significant (near perfect) similarity to old-schoool telemetry signals and could be (probably is) from a seismic sensor that's been forgotten. Those old-school analog telemetrics units would generate a sine wave carrier and take, say an analog gauge like a pressure gauge, and use its pointer shaft to turn a variable resistor or capacitor that is part of the devices' VCO (or similar component). The result was a slowly varying sine wave, with the RXReceive unit calibrated to the frequency the TXTransmit unit would generate with no input set as "zero". I live in Toronto, Canada, and we have a number of these signals in the federal 402-430 MHzMegaHertz (MHz) 10^6 Hz band and more at 1.1-1.8 GHzGigaHertz (GHz) 10^9 Hz, they aren't a mystery here, we know that they are from these old units we find with RDF, they look like an oil drum half buried in the ground, a cable coming from it, with a solar panel and antenna up on a pole or on a tree nearby. Here on the SIGIDWIKI I've seen several people submit samples of these signals as "unknown" and people comment explaining the same thing I just did. These devices get forgotten about ALL the time around here. Toronto FMFrequency Modulation Society (A HAM radio group) has actually salvaged several forgotten units, they all have a label on them with a phone number of the agency/company/school who installed them, and sometimes they say to just take it if you want it because its no longer in use. These units were built decades ago with the simplest and most robust radio hardware available at the time, given that many were upgraded by adding a solar panel and deep-cycle SLAB storage batteries, most are still running, still sending out their slowly Frequency Modulating signals, but with nobody listening.. The modern units are much smaller, have satellite modems instead, and better solar panels and EDLC+Li-Ion energy storage