I seem to remember the caps were specified in an earlier version of the standard, and are no longer required (issue 2, rev 1 February 1999). My understanding is that the LISN is that used for CISPR measurements.
Dave Wilson Alidian Networks Inc. -----Original Message----- From: plaw...@west.net [mailto:plaw...@west.net] Sent: Thursday, June 15, 2000 10:35 AM To: EMC-PSTC; t...@world.std.com; nebs@world.std.com Subject: Bellcore GP-1089 emissions testing: LISN test setup I'm looking through Bellcore GR-1089 Issue 2 Revision 1 for details on the test setup for conducted emissions testing. I was under the impression that some of the measurements involved use of large RF bypass caps to ground, and the interference currents through the capacitor were measured. While I found spec limits and test setups for current probe-style measurements, all the figures simply display a power input network marked 'LISN', which I assume to be the standard 50 ohm network. I can't find a reference that explicitly discusses the use of an RF bypass cap. Could someone point me to the appropriate section? ---- Patrick Lawler plaw...@west.net