Probe compensation is one of those fundamentals that gets glossed over in most oscilloscope tutorials, yet it's the single most common source of measurement error for beginners and pros alike. A 10× probe with a mismatched compensation capacitor will distort every edge you look at — rounding off square waves, exaggerating overshoot, or flattening rise times — and you'll spend hours chasing a circuit "bug" that lives entirely inside your test equipment.

This short, focused video walks through the 30-second sanity check every engineer should run before trusting a scope reading on the Rigol DHO924S (the workflow translates to any scope with a built-in compensation square wave output). Expect to see the classic three states of the compensation square: under-compensated (rounded leading edges), over-compensated (sharp overshoot spikes), and properly tuned (clean, flat-topped square). The 10× attenuator setting is specifically called out because it's where the RC mismatch shows up most dramatically.

The channel has only 2 subscribers, so this is genuinely early-stage content, but the topic is evergreen and the framing — "is your probe lying to you?" — is exactly the right mental model to instill in anyone new to scope work. A worthwhile 30 seconds plus the habit it builds.