Yes, but the equipment which the OP is having trouble with is NOT wifi but rather a satellite TV receiver which does not operate at 2.4GHz. Moreover, the interference doesn't seem to be entering through the antenna (which is on the roof) or through the power line but by direct line of sight from the microwave since he can stop the interference by simply holding a metal sheet between the oven and the set-top box. I am not surprised that a microwave would interfere with 2.4GHz wifi - the oven is allowed to radiate a few 100 mW I think, so that would overpower the majority of wifi cards/routers and even access points. I am surprised, though, that 100mW or even 1W would be enough to interfere with a device operating on a different frequency band and whose antenna is not the entry point for the interference. Joe (OP), have you tried holding that metal shielding plate at various distances from the microwave but along the line of sight? It would be interesting to see if it still prevents the interference when you are holding it near the microwave oven instead of near the set-top box. Sean On Tue, Oct 12, 2010 at 1:34 PM, Marcel Duchamp wrote: > On 10/11/2010 11:48 PM, Sean Breheny wrote: >> >> Am I correct that all of the RF connections to the set top box are >> shielded cable? If so, this seems a bit scary - I wouldn't think that >> the box should be susceptible to such a small signal as can leak out >> of a properly-shielded microwave oven. Even if the IF input were right >> at 2.4GHz, there should be a continuous shield from the LNB to the set >> top box and it should take significant power to inject through this >> shielding. >> > > Where I work, the microwave oven would frequently knock out our 2.4 gig > wireless lan network. =A0It made me wonder the same thing... > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .