Leo Bodnar Video Signal Lag Tester

Measuring HDMI Input Lag

This page describes how to measure HDMI input lag with a Leo Bodnar video signal lag tester. Visit Measuring HDMI Video Latency for instructions on measuring video latency instead.


  1. Record the reported lag value at the center of the middle white block. This is the input lag.

If you’re using the 4K tester, you can also update the firmware to the latest version provided by Leo Bodnar.

Last updated on June 26th, 2022.