Muriel, Unless your spectrum analyzer is equipped with a tracking pre-selector, or a high pass filter, you run the risk of high level emissions at frequencies below 150 kHz desensitizing the front end. This will result in readings that are lower than the actual levels. I remember seeing this a number of years ago when testing to the old German standards that had us doing power line conducted emissions measurements down to 9 kHz. Two different labs claimed that a particular product passed, but when I tested it with a receiver, I failed it. Turns out they were using spectrum analyzers and when I repeated the measurement with a spectrum analyzer, I got the same results they did. I've used nothing but receivers for PLC testing ever since. A tracking pre-selector in front of a spectrum analyzer would work just as well, however.
Ghery Pettit Intel -----Original Message----- From: Muriel Bittencourt de Liz [mailto:[email protected]] Sent: Thursday, November 01, 2001 6:16 AM To: EMC-PSTC List Subject: Difference between SA and Receiver Hello Group, What are the differences that result using: 1. A Spectrum Analyzer (SA) or 2. A Receiver When I make measurements of conducted emissions of an equipment?? Best Regards Muriel ------------------------------------------- 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.
