Joe, For piece of mind. The LISN provides repeatable results for different line impedances. Making sure that the LISN impedance is what it is supposed to be and the insertion loss is satisfactory will give you a better comfort level when going to the test house.
If you have not already done so, I would recommend an isolation transformer. Many factories and office buildings have a great deal of ambient noise that will interfere with your measurements. If you have an s-parameter network analyzer (that works from 150 kHz to 30 MHz), the calibration is not too difficult to perform and there is a procedure outlined in ANSI C63.4 that is easy enough to follow (although for impedance it doesn't mention you need an RF splitter). Good Luck! Michael Peters mpet...@ieee.org -----Original Message----- From: marti...@appliedbiosystems.com [mailto:marti...@appliedbiosystems.com] Sent: Wednesday, November 28, 2001 7:16 PM To: emc-p...@majordomo.ieee.org Subject: LISN Calibration 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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.
