In this tutorial Dave describes what AC trigger coupling is on an oscilloscope and why it can be useful. Not only on old analog CRT oscilloscopes, but modern digital scopes as well. How and why is it different to AC channel input coupling? Also, use of the 50% trigger control, and how the venerable DS1052E is still more usable than the new DS1054Z. Previous video on Rigol DS1054Z and DS2000 Jitter Problem https://www.youtube.com/watch?v=kcOdzFaIYNE Forum: http://www.eevblog.com/forum/blog/eevblog-685-what-is-oscilloscope-ac-trigger-coupling/ EEVblog Main Web Site: http://www.eevblog.com/ The 2nd EEVblog Channel: null Support the EEVblog through Patreon! http://www.patreon.com/eevblog EEVblog Amazon Store (Dave gets a cut): http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/