I would say that if it came calibrated from the manufacturer and has not
suffered visible damage it should be okay.  It is easy to check a few spot
frequencies or use a spectrum analyzer with tracking generator or separate
sweeping sig gen to check performance.  Either way it is not a big deal.

on 11/28/01 4:15 PM, [email protected] at
[email protected] wrote:

> 
> We are in the process of setting up a pre-compliance EMC lab.  One of the
> tests that we will be performing is pre-compliance conducted emissions per
> EN 61326.
> 
> I realize that since we are only performing pre-compliance measurements
> that calibration of the LISN is not required.  However, do you recommend
> calibrating the LISN for pre-compliance measurements?  If so, why?
> 
> Your responses are appreciated
> 
> Regards
> 
> Joe Martin
> Applied Biosystems
> 
> 
> 
> 
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