Rf interference

[Ashfaq Juna]

Hello

(Posted on reading hackspace too)

All of a sudden,  the wireless remote controlled things at home have stopped working or malfunctioning with really reduced range

433 mhz band is affected for sure. Car keyfobs won't work unless very near the card.

I have a very basic handheld (pic attached ) ’spectrum analyser ’ covering  from  240mhz to 960mhz.  Not much use really as the bands are tedious to sweep through and very narrow.

The display however is jumping around more erratically  than ’usual ’ suggesting that the culprit is a spread spectrum type transmitter.

Any ideas of what to do and how to trace this?

Thank you