140 6000 Series Oscilloscope User’s Guide
4 Triggering the Oscilloscope
set the threshold level (TTL, CMOS, ECL, or user defined) for
the selected digital channel group. The threshold value is
displayed in the upper-right corner of the display.
When Ext (External Trigger) is selected, its level can be adjusted
using the Level knob in the Trigger section of the front panel.
The trigger level is displayed in the upper right corner of the
display.
The line trigger level is not adjustable. This trigger is
synchronized with the power line supplied to the oscilloscope.
To use Pulse Width triggering
Pulse Width (glitch) triggering sets the oscilloscope to trigger on
a positive or negative pulse of a specified width. If you want to
trigger on a specific timeout value, use Duration trigger in the
Trigger More menu.
1 Press the Pulse Width key in the Trigger section of the front
panel to display the Pulse Width trigger menu.
2 Press the Source softkey (or rotate the Entry knob on
mixed-signal oscilloscopes) to select a channel source for the
trigger.
Source
Pulse
polarity
Qualifier Qualifier time set
Trigger level
or threshold
Trigger
source
Polarity
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