User manual

Operator's Manual
Pattern Trigger
Pattern is the default trigger when the digital leadset is connected to the oscilloscope, as these users
generally wish to find and trigger upon digital logic patterns.
However, a Pattern trigger can also be set on a user-defined pattern of High or Low voltage levels in analog
channels (including the External Trigger input), or a combination of digital and analog patterns when Mixed
Signal capabilities are available.
On the Trigger dialog, select Pattern trigger type. Open the Digital Pattern dialog to display the controls.
DIGITAL PATTERN
1. Open the Digital Pattern dialog.
2. To apply a digital logic pattern, either:
l Enter the hexadecimal value of the pattern in Hex. Lines will take a logical 1, 0, or X ("Don't Care")
according to the pattern.
l Touch the Dx button for each active line, and select whether it must be High or Low compared to
the logic threshold. Depending on your selection, a logical 1 (High) or 0 (Low) now appears on the
dialog. Leave X selected for any line you wish to exclude from the pattern. Use the Left and Right
Arrow buttons to display lines in other digital banks.
NOTE: As an alternative to a digital logic pattern, you may set edge conditions on any line. Touch the Dx
button and choose the edge. Edge conditions always assume a logical OR in the overall trigger criteria.
TIP: As you work, the checkboxes along the bottom of the dialog will change to show the pattern. You can
also use these checkboxes to make selections.
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