Seems an attenuator COULD improve matching and VSWR if it then became a significant part of the load impedance; it isn't a given..... On the other hand, adding the attenuator should NOT cause the VSWR to become very high unless it is not a 50 ohm attenuator......
Mike Hopkins -----Original Message----- From: Colgan, Chris [mailto:chris.col...@tagmclaren.com] Sent: Wednesday, February 20, 2002 4:26 AM To: EMC Forum Subject: RE: EN61000-6-2 In my experience attenuators improve impedance matching and hence VSWR. There must be something wrong with your set up. Regards Chris Colgan Compliance Engineer TAG McLaren Audio Ltd The Summit, Latham Road Huntingdon, Cambs, PE29 6ZU *Tel: +44 (0)1480 415 627 *Fax: +44 (0)1480 52159 * Mailto:chris.col...@tagmclaren.com * http://www.tagmclaren.com > -----Original Message----- > From: Sam Wismer [SMTP:swis...@bellsouth.net] > Sent: 19 February 2002 16:52 > To: EMC Forum > Subject: EN61000-6-2 > > Hi Group, > > EN 61000-6-2 calls for severity level 3, or 10Vrms for conducted > disturbances. This equates to 37dBm which is 7dB higher than the upper > limit my receiver will handle (during calibration of the CDN). I've tried > to use an attenuator and compensate for it in my readings, but this > creates a high VSWR. Any ideas how to extend the dynamic range of my > receiver without causing high VSWR? > > > > > > Kind Regards, > > > > > > Sam Wismer > > Engineering Manager > > ACS, Inc. > > > > Phone: (770) 831-8048 > > Fax: (770) 831-8598 > > > > Web: www.acstestlab.com > > > ************************************************************** Please visit us at www.tagmclaren.com ************************************************************** The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. TAG McLaren Audio Ltd The Summit, 11 Latham Road Huntingdon, Cambs, PE29 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) ************************************************************** Please visit us at www.tagmclaren.com ************************************************************** ------------------------------------------- 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: Ron Pickard: emc-p...@hypercom.com 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: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- 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: Ron Pickard: emc-p...@hypercom.com 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: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
