Robert, The following are publications dealing with High Speed Design and Manufacture. I have also included information on three equipment manufacturer's who provide equipment. If you have any questions, please do not hesitate to contact me as we provide test services as well. IPC-D-316 High Frequency Design Guide. IPC-D-317 Design Guidelines for Electronic Packaging Utilizing High-Speed Techniques. IPC-D-275 Design Standard for Rigid Printed Boards and Rigid Printed Board Assemblies. IPC-HF-318 Microwave End Product Board Inspection & Test Controlled Impedance Testing is Typically Performed by TDR (Time Domain Reflectometry) Equipment can be purchased from the following: ------------------------------------------------------------------------------ -- Tektronix, Wilsonville Oregon, 800-835-9433 11800 Series Digital Sampling Oscilloscope SD-24 TDR/Sampling Head SIU-800 Static Isolation Unit Misc Cables. ------------------------------------------------------------------------------ -- Hewlett Packard, Santa Clara, California, 800-452-4844 54120T Series High-Bandwidth Digitizing Oscilloscope With 20Ghz Four Channel Test Set Misc Cables ------------------------------------------------------------------------------ -- Polar Instruments, Guernsey, Channel Islands, U.K. +1(0481) 53081 U.S. West Coast Rep. (800) 328-0817 CITS100 Single Channel TDR System CITS200 Dual Channel TDR System Various Microstrip Probes. ------------------------------------------------------------------------------ - Bob Neves Director of Technical Services MICROTEK LABORATORIES (800) 878-6601 [log in to unmask]