Reference
3Ć34
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 3-18).
Main Time Base
Main Time Base Time/Div
Main Trigger
Source = Ch 1
Main Trigger
Slope = Rising Edge
Main Trigger
Level
Figure 3-18: Edge 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 (pop-up) (see Figure 3-19).
Source
To select which source you want for the trigger:
Press TRIGGER MENU ➞ Type (main) ➞ Edge (pop-up) ➞
Source (main) ➞ Ch1, Ch2, Ch3 (Ax1 on the TDS 620A & TDS 524A), Ch4
(Ax2 on the TDS 620A & TDS 524A), AC Line, or Auxiliary (TDS 640A &
TDS 644A) (side).
Edge Trigger
Readouts
Operation
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