[GreenKeys] RF noise

[Craig Sawyers]

> Turned out to be one of those bulbs with the thin tubes
> looping up and down
> with a flourescent type illumination.

Indeed.  We're encouraged to use energy efficient bulbs - in fact in the UK
there are plans to phase out incandescent bulbs entirely - but there seems
to be no rules regarding the EM emissions from them.  I was trying to do
some fairly ordinary oscilloscope measurements and wondering where all the
rf fuzz was coming from.  Turned out to be the bulbs in my lab.  Just try
waving a scope probe around - anywhere within a metre of these bulbs you can
get hundreds of millivolts of rubbish.

I would have thought that bulbs would fall under EMC regulations that govern
everything else from the toaster to the coffee machine - but apparently not.

Craig