This module explores the Rapid Trigger feature available on PicoScope 4000 series scopes, explaining how it differs from standard repeat trigger and why it matters for capturing ignition events.

Using a Honda Civic with a distributor ignition system, Tom demonstrates and quantifies the performance difference between repeat trigger and rapid trigger through timed capture tests at idle and raised RPM. The testing shows that repeat trigger misses roughly half of all ignition events, while rapid trigger captures every single one.

Key takeaways include:

• How to configure rapid trigger settings, including waveform count and sample rate
• Why rapid trigger is particularly valuable for diagnosing single-cylinder misfire events on coil-on-plug systems
• A practical demonstration of catching a brief, induced ignition failure that could easily be missed with repeat trigger