Robert Macy wrote: > > For measuring emissions per CISPR 22B what is the proper distance for > the placement of the antenna? > > Is it 3m? or 10m? > > [I'm running across reputable labs that claim there is nothing wrong > with measuring everything at 3m, just like FCC B.] > > - Robert - > [email protected] > AJM Electronics > > --- > ~ OLX 2.1 TD ~ You'd be surprised how much it costs to look this cheap.
Hi Robert, Personally, I prefer 3m testing to look for low frequency near field effects. 30 MHz near field begins to taper off at around 1.5 meters. But, that's strictly my own preference. I've had people tell me they prefer 10m testing because near field effects messed up their 3m testing - they failed at 3m, but passed at 10m. Last I knew for CISPR 22B, 3m or 10m was your choice. Regards, Doug
