Thank you for your quick response and you help. It is greatly appreciated. Max -----Original Message----- From: Sean Breheny To: PICLIST@MITVMA.MIT.EDU Date: Tuesday, September 15, 1998 1:58 PM Subject: Re: [OT]Simple emission tester with Scope >Hi all, > >At 08:14 PM 9/15/98 +0000, you wrote: >>The loop method tests only for current (especially if terminated as I >>advocate). For voltage (E field) a prod probe is more useful. This can be >>a unmodified scope probe set to x 10 with the clip-on gripper prolonged by >>a 25 mm piece of rigid wire, as antenna. The x10 setting is essential >>imho. The probe is "calibrated" in the same way as above. > >Maybe I m way off, but I don't see how it is possible to test only for >"current(B field)" or only for "voltage(E field)" Maxwell's equations >require that an EM wave in free space have the same E field strength as B >field strength. One determines the other. So, if you know the B field >strength, you know the E field strength. Of course, this only applies to >oscillating fields, if there is a steady state E or B field as well, then >that will be added into the solution, but that doesn't matter for EMC. > >Sean > >+--------------------------------+ >| Sean Breheny | >| Amateur Radio Callsign: KA3YXM | >| Electrical Engineering Student | >+--------------------------------+ >Save lives, please look at http://www.all.org >Personal page: http://www.people.cornell.edu/pages/shb7 >mailto:shb7@cornell.edu Phone(USA): (607) 253-0315 ICQ #: 3329174