Getting The Most Out Of Your Oscilloscope: Trigger Delay

Figure 1: Pre-triggering, or trigger delay, is a useful tool for
debugging applications

Triggering is one of the most basic, yet most useful, tools your oscilloscope offers you. Say you want to see what led up to, and/or what follows, a trigger condition. You're looking at an interesting waveform such as that shown in Figure 1. You have the trigger's delay position set at 10% and 90%.