User manual

WaveSurfer 3000 Oscilloscopes
3. If you have not already set a logic threshold, open the Levels dialog and select a Logic Family for each
digital bank from which you've selected lines. To set a custom logic threshold, choose Logic Family User
Defined, then enter the Threshold voltage and Hysteresis.
NOTE: Digital lines inherit the Logic Setup made when defining digital groups. However, you can change
the logic threshold on the Levels dialog, as well. The two settings are linked; they will always reflect
whatever was last selected on either dialog. Logic thresholds can only be set per lead bank, not
individual line.
ANALOG PATTERN
Mixed Signal Dialogs
On oscilloscopes with the MSO option, you can use the Digital Pattern dialog to set an analog pattern, as
well.
1. To add the analog pattern to the digital pattern, leave your digital pattern as is and skip to step 2.
To create an analog-only pattern, touch Set All To... and select Don't Care. This will eliminate any
meaningful digital pattern and activate all the Boolean operators.
2. Touch the Left Arrow button until the C1-EXT group of inputs is displayed in the main section of the
dialog.
3. Touch the Cx button for each input to be included in the pattern, and select whether it must be High or
Low compared to the threshold Level you will set.
Depending on your selection, a logical 1 (High) or 0 (Low) now appears on the dialog. Leave Don't Care
("X") selected for any input you wish to exclude.
4. Select the Boolean operator (AND, NAND, OR, or NOR) that describes the relationship among inputs (e.g.,
C1 must be High AND C2 must be Low).
NOTE:Only the AND operator is available when combining analog and digital patterns. In the example
above, all digital lines have been set to Don't Care ("X"), so all operators are available.
5. Open the Levels dialog and enter the voltage threshold for each input included in the trigger.
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