There is nothing to "go bad" in a LISN if it hasn't been physically damaged, which should be obvious by inspection. If there is any concern, a spot check or insertion loss sweep with a tracking generator or a sig gen is perfectly okay for assessing LISN performance. And the analyzer/generator need not be calibrated either - the chance that all three devices are off by the same amount are vanishingly small.
on 11/29/01 6:40 AM, Sundstrom Michael (NMP-RD/Dallas) at [email protected] wrote: > > The only problem I see with not calibrating the LISN is you wouldn't > know if / or when it goes bad until you cross check it with a calibrated > LISN. > > I would suggest you run your precompliance lab just like the real lab. > This way you'll get the same results as the accredited lab you test > with. No surprises this way. > > Michael Sundstrom > NOKIA > TCC Dallas / EMC > ofc: (972) 374-1462 > cell: (817) 917-5021 > amateur call: KB5UKT > > > -----Original Message----- > From: ext Ken Javor [mailto:[email protected]] > Sent: Wednesday, November 28, 2001 9:06 PM > To: [email protected]; [email protected] > Subject: Re: LISN Calibration > > > > 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 >> >> >> >> >> ------------------------------------------- >> This message is from the IEEE EMC Society Product Safety >> Technical Committee emc-pstc discussion list. >> >> Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ >> >> To cancel your subscription, send mail to: >> [email protected] >> with the single line: >> unsubscribe emc-pstc >> >> For help, send mail to the list administrators: >> Michael Garretson: [email protected] >> Dave Heald [email protected] >> >> For policy questions, send mail to: >> Richard Nute: [email protected] >> Jim Bacher: [email protected] >> >> All emc-pstc postings are archived and searchable on the web at: >> No longer online until our new server is brought online and the old > messages >> are imported into the new server. >> > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the old > messages are imported into the new server. > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the old messages > are imported into the new server. > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
