Rigol DS1104B [141/168] Example 3 capture a single shot signal

RIGOL

User’s Guide for DS1000B Series

3-3

Example 3: Capture a Single-Shot Signal

To capture a single event, it needs to gather some pre-test knowledge of the signal

in order to set up the trigger level and slope correctly. For example, if the event is

derived from TTL logic, a trigger level of 2 volts should work on a rising edge.

The following steps show how to use the oscilloscope to capture a single event.

1. Set the probe and the channel attenuations to 10X.

2. Set up the trigger.

(1) Press the MENU button in the Trigger control area to display the menu.

(2) Press Edge to select the trigger mode.

Press Slope to select .

Press Source to select CH1.

Press Sweep to select Single.

Press Set Up→Coupling to select DC.

(3) Turn the vertical and horizontal knobs to adjust the Volts/Div and

the Time base in a proper range for the signal.

(4) Turn the

knob to adjust trigger level.

(5) Press Run/Stop button to start capturing. When the trigger conditions are met,

data appears on the display representing the data points that the oscilloscope

obtained with one acquisition.

This function helps to capture the occurrence easily, such as the noise with

large amplitude; and set the trigger level higher a little above the normal level

and press Run/Stop and wait. When noise occurs, the instrument will record the

waveform before and after the trigger. Adjust the knob in the

horizontal control area and change the level of the trigger position, will get the

inverted delay trigger. It is useful to observe the waveform before the

occurrence of the noise.