Keithley 2601B Reference Manual page 195

Section 3: Functions and features
Output characteristics:
•
In addition to trigger events from other trigger objects, the digio.trigger[N].assert() and
tsplink.trigger[N].assert() commands generate a low pulse that is similar to the falling
edge trigger mode.
Either edge trigger mode
The either edge trigger mode generates a low pulse and detects both rising and falling edges.
Input characteristics:
•
All rising or falling edges generate an input trigger event.
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Series 2600B System SourceMeter® Instrument Reference Manual
Figure 76: RisingA output trigger
Figure 77: Either edge input trigger
2600BS-901-01 Rev. B / May 2013