Hi Martin, If we want to measure the noises from the signal tracks, we are normally using a good quality (low loss) coaxial cable, one end attached to a resistor, the other end connect to the receiver/SA. The other end of the resistor can be poking to the signal tracks.
The other technique is using a good quality coaxial cable, one end connect to the receiver/SA, the other end are attached to a piece of insulated coating copper wire (via BNC) making into different shape/sizes depend on the application. We are using this technique to measure noise leakage and also noisy areas within the PCB. I hope you do find these information useful. Regards Vi Van Mitsubishi PC [email protected] > ---------- > From: > [email protected][SMTP:[email protected] > rg] on behalf of Martin Rowe[SMTP:[email protected]] > Sent: 16 July 1997 18:12 > To: [email protected] > Subject: Board-Level EMI Measurements > > Greetings, > > I'm thinking about writing an article on techniques for > board-level EMI measurements. For example, one person I > know uses a paper clip to measure radiated EMI from a > microprocessor chip. I'd like to include techniques for > measuring EMI anywhere within an enclosure, but not > outside an enclosure. That's the domain of regulations. > > If you have any techniques that you'd like to discuss, please > e-mail me. Be assured that I will not publish anyone's name > (or any company's name) without permission. Thanks for > your help. > > Martin Rowe > Technical Editor > Test & Measurement World > voice 617-558-4426 > fax 617-558-4470 > e-mail [email protected] > > >
