Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 3: Functions and features
2651A-901-01 Rev. A / March 2011 3-63
Output characteristics:
• In addition to trigger events from other trigger objects, the digio.trigger[N].assert() and
tsplink.trigger[N].assert() functions release the line if the line is latched low. The pulse
width is not used.
• The physical line state does not change until all drives (internal and external) release the line.
• Action overruns occur if the internal drive is not latched low and a source event is received.
Figure 62: SynchronousA output trigger
External Drive
Internal Drive
Physical Line State
Event
Stimulus Event
Action Overrun
Output Trigger
Synchronous trigger mode
The synchronous trigger mode is a combination of SynchronousA and SynchronousM trigger modes.
Use the Synchronous trigger mode for compatibility with older Keithley Instruments products.
NOTE
Keithley Instruments recommends using SynchronousA and SynchronousM modes only.
Input characteristics:
• The falling edge generates an input event and latches the internal drive low.
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