User manual

WaveSurfer 3000/3000z Oscilloscopes Operator's Manual
Trigger Set Up
To open the Trigger dialog, press the front panel Trigger Setup button or touch the Trigger descriptor box.
Different controls will appear depending on the Trigger Type selected (e.g., Slope for Edge triggers).
Complete the settings shown after making your selection.
The trigger condition is summarized in a preview window at the far right of the Trigger dialog. Refer to this
to confirm your selections are producing the trigger you want.
Source
For most triggers, the Source is the analog channel or digital line to inspect for the trigger conditions.
Pattern triggers may utilize multiple sources (such as a mix of analog and digital signals).
Coupling
For analog triggers, specify the type of signal Coupling at the input:
l DC - Frequency components are coupled to the trigger circuit for high frequency bursts, or where the
use of AC coupling would shift the effective trigger level.
l AC - Capacitively coupled. DC levels are rejected, and frequencies below 50 Hz are attenuated.
l LFREJ - Coupled through a capacitive high-pass filter network, DC is rejected and signal frequencies
below 50 kHz are attenuated. For stable triggering on medium to high frequency signals.
l HFREJ - DC coupled to the trigger circuit, and a low-pass filter network attenuates frequencies above
50 kHz (used for triggering on low frequencies).
Slope/Polarity
For some triggers, such as Edge, you will be asked to select the waveform Slope (rising vs. falling) on which
the triggering event may occur.
For others, such as Width, the equivalent selection will be Polarity (positive vs. negative).
Level
For analog triggers, enter the voltage Level at which the triggering condition must occur. Use the Find
Level button to set the level to the signal mean.
Trigger types that require multiple crossings to define the triggering condition—such as Window, SlewRate
and Runt— will have Upper Level and Lower Level fields.
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