Keithley 2651A Reference Manual page 169

Section 3: Functions and features
Synchronous acceptor trigger mode (SynchronousA)
Use the synchronous acceptor trigger mode (SynchronousA) in conjunction with the SynchronousM
trigger mode. The role of the internal and external drives are reversed in the SynchronousA trigger
mode.
Input characteristics:
•
The falling edge is detected as the external drive pulses the line low, and the internal drive
latches the line low.
3-62
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Figure 60: SynchronousM output trigger
External Drive
Internal Drive
Physical Line State
Event
Stimulus Event
Action Overrun
Figure 61: SynchronousA input trigger
External Drive
Internal Drive
Physical Line State
Event
Stimulus Event
Action Overrun
Pulse Duration
Output Trigger
Input Trigger
2651A-901-01 Rev. A / March 2011