Keithley 2601 Reference Manual page 240

Section 10: Digital I/O and Triggering
NOTE To have direct control of the line state, use the Bypass trigger mode.
Falling Edge trigger mode
The Falling Edge trigger mode generates low pulses and detects all falling edges.
illustrates the characteristics of the falling edge input trigger.
Figure 10-6: Falling Edge input trigger
Input characteristics:
• Detects all falling edges as input triggers
Figure 10-7: Falling Edge output trigger
Output characteristics
• The trigger.assert command generates a low pulse for the programmed pulse
duration
10-16
Series 2600 System SourceMeter® Instruments Reference Manual
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Figure 10-6
2600S-901-01 Rev. C / January 2008