Doug, Tegam, Fischer and Pearson all make what would be called a current clamp as did Stoddard and Empire Devices when they were around. Absorption clamps such as Rohde and Schwarz and Schwarzbeck are not the same as the above products in the sense that they are measuring radiated emisssions effects of cables as opposed to dealing with cables that can't be measured by conventional methods. To my knowledge Tegam, Fischer and Pearson all have web sites. I have experience in using a Pearson, a Stoddard/Empire Devices(which I believe Fischer and Tegam both base their products on) as well as a Rohde and Schwarz absorption clamp.
I hope this helps. Regards G. Rae Dulmage, B. Comm., President TelApprove Services Corporation 1+613 257 3015 POWELL, DOUG wrote: > > Hello Group, > > Some time ago (1996) in an email thread on absorbing clamps, Michael A. > Royer stated that CISPR 14 defines a method for using current clamps instead > of open area test sites. There was another thread for an on-site radiated > emissions test when in noisy environments that mentioned using clamp-on > probes. > > Additionally I recall and article in one of the trade magazines (Compliance > Engineering, ITEM, etc.) that described a method where a person could bundle > all of the service connections for a product into an RF current clamp-on > probe. The article also had information on converting the data on a > spectrum analyzer into equivalent open area test site numbers. > > I would like to perform a test like this but have been unable to find a > clamp-on probe that has at least a 100mm inner diameter and a frequency > range of 30 MHz to 1000 MHz, possibly this is limited by physics. > > Is there anyone out there who is able to point me to articles or websites > on: > > 1) RF current probe manufacturers. > 2) The article and/or mathematical algorithm on measuring radiated > emissions with current probe. > 3) Application information. > > Thank you for any help you can provide. > > ================================== > Doug Powell, Compliance Engineer > Advanced Energy Industries, Inc. > Fort Collins, Colorado USA > > [email protected] > www.advanced-energy.com > ================================== --------- 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).
