You should definitely check with IEC 1000-4-6 . The usefulness of current probes is physically limited to 200 Mhz. The higher the frequency the smaller the probe needs to be and the lesser the interwinding capacitance is required. These are two restraints that cross each other in opposite direction. Somewhere at 200 Mhz it stops. Smaller probes get higher, but become too small to cover commercial cables. For immunity some power needs to be transferred , this requires large ferrite core, this also inhibits good performance.
Regards, Gert Gremmen Ing. == Ce-test, Qualified testing == Consultants in EMC, Electrical safety and Telecommunication Compliance tests for European standards and ce-marking Member of NEC/IEC voting committee for EMC. Our Web presence: http://www.cetest.nl List of current harmonized standards http://www.cetest.nl/emc-harm.htm 15 great tips for the EMC-designer http://www.cetest.nl/features01.htm -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Donald McElhearn Sent: dinsdag 24 november 1998 18:26 To: [email protected] Subject: Current Probes Could some of the more experienced member of this forum share there views and or experiences on the usefulness of current probes in carry out pre-compliance RF immunity testing. I am aware that there are limitation to this method of current injection to simulate true RF field immunity conditions. Short of a screened anechoic chamber can this method allow a manufactuer some means of evaluating what he/she may experience under real test conditions? Do the costs justify the benefits? Donald Mcelheran Product Development Co-ordinator --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
