I'd be inclined to look at the design. Bandaids have a way of multiplying until your product looks like a mummy.
If it's a low-level power problem, make sure the EUT's regulator can respond to induced ripple. This may be as simple as exchanging a cheap electrolytic cap for one with better ESR, or you may have to redesign the regulator's filter loop. If the problem is unregulated power to a PA stage, try getting better balance in the stage; look at it as a CMR problem. Look for ground-loop problems; a shared return between a stage run from the injection point and a low-level amplifier will do what you report. And you might look for an unintended path. Active switches can be modulated, too. Good luck! Cortland ------------------------------------------- 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: Michael Garretson: pstc_ad...@garretson.org 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: No longer online until our new server is brought online and the old messages are imported into the new server.
