[SI-LIST] EMI--bare board vs. case

Dear List:

        Is there any expectation for EMI emissions of a bare board vs. an 
assembled
system?  Does anybody ever test a bare board for EMI...with the idea that a
case is expected to attenuate N dBuV and then it will be low enough to pass?
Or have a standard for noise on power/ground planes somehow correllated with
emissions?  Or, more pointedly...

        Is it as simple as:
  (M dB generated)
- (N dB attenuated)
__________________
 (P dB picked up by the FCC)   ?

Boris

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