Controlled impedance PCBs

Software for impedance calculation and test coupon design:
ICD Stackup Planner from In-Circuit Design Pty Ltd. (www.icd.com.au)

Controlled impedance measuring device:
Zmetrix ST300 from ZMetrix, Inc. (www.zmetrix.com)

Measurement according IPC-2141A (www.ipc.org)

Example of impedance calculation and test coupon design

Zmetrix controlled impedance workstation

Controlled impedance measurement

Zmetrix controlled impedance software

Example of controlled impedance test protocol

PCB with the controlled impedance test coupon