Strange RF issue with PC

[BoFan]

Hello all,

I am working on a SX1279 RF transceiver pair and I have observed a strange issue - whenever the transmitter is less than .5 meters from the PC a mirrored and stretched signal appears and the receiver can't demodulate the packet.

It took me a while to figure it out that the reason is the PC proximity which in normal use won't be a problem, but I am curious to what might be the reason for that?

Thanks

 

[G4BCH]

Probably a receiver overload. problem.