Delta MS250 Návod k obsluze stáhnout pdf (Strana 24)

Operator's Manual

1. Open the Digital Pattern dialog.

2. At the far right of the dialog, choose either Logic Bus or Logic.

3. Optionally, deselect Filter Out Unstable Conditions. This default filter ignores short

glitches in logic state triggers that last less than 3.5 ns.

4. If using Logic Bus, touch Source and select the digital group. Any lines that are not in

this group will now be disabled.

5. To apply a digital logic pattern, either:

l Enter the hexadecimal value of the pattern (in Hex or Value). Lines will take a

logical 1, 0, or X ("Don't Care") according to the pattern. Disabled lines will remain

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.

6. 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.

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Delta MS250 Návod k obsluze Strana 24