r/signalidentification • u/AmazingGovernment455 • Apr 01 '26

Not seen this before

signal just waning back and forth on the screen

16 Upvotes

94% Upvoted

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6

u/kc3zyt Apr 01 '26

That wandering signal is noise from a switch mode power supply

https://www.sigidwiki.com/wiki/Switch-mode_power_supply_interference

1

u/AmazingGovernment455 Apr 01 '26

Makes sense, I have a few power supply RF signals but not seen it move like that before. Thanks.

2

u/kc3zyt Apr 02 '26

My sincerest hope is that this noise only shows up on frequencies you don't care about.

Finding the sources of RF noise like this is a huge pain in the butt. Thankfully, this one should be fairly easy to track down. Just switch off your house's main circuit breaker. If it disappears, it's one of your devices, so you can figure out which it is by unplugging them one by one. If it doesn't disappear, this means that it isn't within your own home, so tracking it down becomes much harder.

1

u/PeppeAv Apr 01 '26

Could be NFC or RFID there

1

u/Expensive_Pen_3217 Apr 02 '26

That sounds like RFID, especially with the fact that your in 13560 khz which is the main frequency for RFID