How to Measuring Impedance in PCB Manufacturing Process.

There were so many guys don’t know measuring impedance.

This paper we will discuss How to Measuring Impedance in PCB Manufacturing Process.

Measuring Impedance

Testing the impedance values within your PCB is not always easy.

Various factors such as accessibility, via connections, branches off tracks and length of traces can make getting an accurate reading difficult

Test Coupon: is manufactured on the same panel as your PCB and will contain the same trace characteristics as the traces requiring impedance control on your PCB.

A Time Domain Reflectometer (TDR) is the most common method of measuring impedance.

Basically this sends a signal along a line and then measures the part of the signal that is reflected back when an impedance mismatch occurs.