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3Ć32
Edge Triggering
An edge trigger event occurs when the trigger source passes through a
specified voltage level in a specified direction (the trigger slope). You will
likely use edge triggering for most of your measurements.
You can select the edge source, coupling, slope, level, and mode (auto or
normal).
The Trigger readout shows some key trigger parameters (Figure 3Ć18).
Main Time Base
Main Time Base Time/Div
Main Trigger
Source = Ch 1
Main Trigger
Slope = Rising Edge
Main Trigger
Level
Figure 3Ć18:ăEdge Trigger Readouts
The Edge Trigger menu lets you select the source, coupling, slope, trigger
level, mode, and holdoff.
To bring up the Edge Trigger menu:
Press TRIGGER MENU ➞ Type (main) ➞ Edge (popĆup) (see Figure 3Ć19).
Source
To select which source you want for the trigger:
Press TRIGGER MENU ➞ Type (main) ➞ Edge (popĆup) ➞
Source (main) ➞ Ch1, Ch2, Ch3 (Ax1 on the TDS 620A), Ch4 (Ax2 on the
TDS 620A), AC Line,orAuxiliary (side).
Edge Trigger
Readouts
Operation