Understanding Synchronous Triggering Modes - Keithley 3700A Series Reference Manual

Series 3700A System Switch/Multimeter Reference Manual
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.
•
An action overrun occurs if the physical line state is low while a stimulus event occurs.

Understanding synchronous triggering modes

Use the synchronous triggering modes to implement bidirectional triggering, to wait for one node, or
to wait for a collection of nodes to complete all triggered actions.
All non-Keithley instrumentation must have a trigger mode that functions similar to the SynchronousA
or SynchronousM trigger modes.
To use synchronous triggering, configure the triggering master to the SynchronousM trigger mode or
the non-Keithley equivalent. Configure all other nodes in the test system to SynchronousA trigger
mode or a non-Keithley equivalent.
Synchronous master trigger mode (SynchronousM)
Use the synchronous master trigger mode (SynchronousM) to generate falling edge output triggers,
to detect the rising edge input triggers, and to initiate an action on one or more external nodes with
the same trigger line.
In this mode, the output trigger consists of a low pulse. All non-Keithley instruments attached to the
synchronization line in a trigger mode equivalent to SynchronousA must latch the line low during the
pulse duration.
To use the SynchronousM trigger mode, configure the triggering master as SynchronousM and then
configure all other nodes in the test system as Synchronous, SynchronousA, or to the non-Keithley
Instruments equivalent.
Use the SynchronousM trigger mode to receive notification when the triggered action on all nodes is
complete.
3700AS-901-01 Rev. D/June 2018
Figure 91: Either edge output trigger
Section 5: Switching and scanning
5-35