I missed the first part of this, so sorry if some of this has already been said.
You cannot do immunity testing, even as low as 1 V/m, without a shielded enclosure - you will exceed the fcc limits, which are in the region of a miilivolt/m or less (dependant of standard and frequency.
Generally, precompliance testing is limited to a spectrum analyser and a calibrated antenna, as you are much more likely to fail Radiated Emissions that you are Radiated Susceptibility (in the commercial world anyway).
Last time I ran a commercial EMC lab, about 2/3rd of customers failed Radiated Emission first time through.
Regards,
Bill C
snipped-for-privacy@buffalo.com (qu1nn) wrote in news:417b2fd1.0306200904.5444a44
> @posting.google.com:
>
> > First Question:
> > you mention that broadband transmissions created in an unshielded
> > environment could block out services....
> > Living in NY state...
> > * what is max power that can be dissipated and NOT interfere?
> > * what is the max safe level for human exposure?
> >
> > ------------------------
> > Tems Cell:
> > I did some looking up on this and the EUT is larger than most of the
> > available equipment that is on the market. (need some 4' x 4' area)
> >
> > Also this is pre-compliance testing .. so I need to keep costs down.
> >
> > -----------------------
> >
> > Thanks for the Agilent reference, it led me to find many articles on
> > how to use near field probes at a lower power so as not to cause any
> > health / FCC issues. This method may provide me with additional
> > clues. ( This too would go along with the radiated emissions approach
> > that you mention)
> >
> > Qu1nn
> >
>
> Glad the Agilent reference was useful to you.
>
> If you want to know what are defined as safe linits for exposure, I can
> recommend the Narda site at
>formatting link
> This has a graphical representation of the recommended limits and links
> to the relevant safety autorities.
>
> As for what level will not cause interference,this would be the same
> levels specified in the emission levels for EMC conformance.
>
> Sorry the TEMS cell approach won't work for you, but with the size of EUT
> you have you would need a full screened room.
>
>
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