Technetters, how does one make impedance measurements on what I think is a grounded coplanar waveguide? The configuration is, in one plane, what appears to be a signal trace flanked by two much larger conductors. I have a Tektronix time domain reflectometer with P8018 (for single-ended impedance) and P80318 (for differential impedance) probes. I called Tektronix, from which I have gotten excellent information in the past on other matters, but the technical support could not advise on this matter. Thanks for any insight. Louis Hart Compunetics Monroeville, PA USA [log in to unmask]<mailto:[log in to unmask]> 412-858-1232 ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________