Contact AMS in Knoxville, Tenn website is ams-corp.com They have very highly specialized equipment for measuring impedances. We use them for testing RTDs in service, Triax cable verification, impedance-current-power demand measurements on inservice equipment. They may have equipment that performs what you need. pat -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Louis Hart Sent: Wednesday, July 18, 2012 2:20 PM To: [log in to unmask] Subject: [TN] Controlled Impedance measurements Technetters, I am trying to measure the impedance of some traces on a printed circuit board, traces that are 2.5 cm - 3.5 cm in length. They are too short for the TDR here to measure. Could a Vector Network Analyzer make impedance measurements on traces that short? If so, does anyone know of a lab that could make such measurements? 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] ______________________________________________________________________ ______________________________________________________________________ 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] ______________________________________________________________________