Hardware Trigger Modes - Keithley 2601 Reference Manual

Series 2600 System SourceMeter® Instruments Reference Manual

Hardware trigger modes

Use the hardware trigger modes to integrate Keithley Instruments and non-Keithley instruments
into an efficient test system. The hardware synchronization lines are classic trigger lines. The
Series 2600 contains 14 digital I/O lines and three TSP-Link synchronization lines that you can use
for input or output triggering.
Table 10-5
Hardware trigger mode summary
Trigger mode
Bypass
Either Edge
Falling Edge
Rising Edge
Rising A
RisingM
Synchronous
SynchronousA
SynchronousM
Each trigger mode controls the input trigger detection and output trigger generation. The input
detector monitors for and detects all edges, even if the node that generates the output trigger
causes the edge.
A trigger overrun generates if an input trigger is received before the previous input trigger
processes. To determine if a trigger overrun has occurred, reference the trigger overrun attributes.
For additional information on the hardware trigger modes,
page 12-1 for more information.
2600S-901-01 Rev. C / January 2008
Table 10-5
Output
Unasserted Asserted
N/A N/A
High Low
High Low
N/A N/A
High Low
Low High
High
Low
latching
High
High
latching
High Low
Return to Section Topics
provides a summary for each hardware trigger mode.
Input
Detects
Use the writebit and
writeport commands for direct
N/A
line control (Version 1.4.0 and
higher).
Short input pulses can cause a
Either
trigger overrun.
Falling
• The programmed state of the line
determines if the behavior is
similar to RisingA or RisingM
N/A
•High similar to RisingA
•Low similar to RisingM
Rising
None
• Behaves similar to
SynchronousA
• Trigger overrun detection is
disabled
Falling
• To mirror the SynchronousA
trigger mode, set the pulse
duration to 1µs or any small
nonzero value
Falling
Ignores the pulse duration.
Rising
see "Instrument Control Library" on
Section 10: Digital I/O and Triggering
Notes
10-15