Keithley 2635 Reference Manual

2600S-901-01 Rev. C / January 2008 Return to Section Topics 12-21
Series 2600 System SourceMeter® Instruments Reference Manual Section 12: Instrument Control Library
digio.trigger[N].overrun
Replace N with the number of the digital I/O trigger line: 1 to
14
Attribute Use this attribute to read the trigger overrun status.
Usage overrun = digio.trigger[N].overrun
overrun The trigger overrun state.
Remarks • A read only attribute.
• Indicates an event was ignored because the event detector was in the detect state when
the event was detected.
digio.trigger[N].pulsewidth
Replace N with the number of the digital I/O trigger line: 1 to
14.
Attribute The length of time that the trigger line will be asserted for output triggers.
Usage width = digio.trigger[N].pulsewidth Reads pulse width.
digio.trigger[N].pulsewidth = width Writes pulse width.
width The pulse width length (seconds).
Remarks • Setting pulsewidth to 0 (seconds) asserts the trigger indefinitely.
• The default pulsewidth time is 10µs.
Details See “Controlling digital I/O lines” in Section 10.
Also see digio.trigger[N].release
Example -- Sets the pulse width for trigger line 4 to 20µs:
digio.trigger[4].pulsewidth = 20e-6
digio.trigger[N].release
Replace N with the number of the digital I/O trigger line: 1 to
14.
Function Releases an indefinite length or latched trigger.
Usage digio.trigger[N].release()
Remarks Releases a trigger that was asserted with an indefinite pulse width, as well as a trigger that
was latched in response to receiving a synchronous mode trigger.
Details See “Controlling digital I/O lines” in Section 10.
Also see digio.trigger[N].pulsewidth
Example Releases trigger line 4:
digio.trigger[4].release()
digio.trigger[N].wait
Replace N with the number of the digital I/O trigger line: 1 to
14.
Function Waits for a trigger.
Usage triggered = digio.trigger[N].wait(timeout)
timeout Specifies the time-out value in seconds.
triggered A customized variable that stores the value true if a
trigger is detected, or false if a trigger is not
detected during the time-out period.
Remarks This function waits up to the timeout value in seconds for an input trigger. If one or more
trigger events are detected since the last t
ime digio.trigger[N].wait or
digio.trigger[N].clear was called, this function immediately returns. After waiting
for a trigger with this function, the event detector is automatically reset and rearmed. This is
true regardless of the number of events detected.
Details See “Controlling digital I/O lines” in Section 10.
Also see digio.trigger[N].clear

Keithley 2635 Specifications

General

Brand	Keithley
Model	2635
Category	Measuring Instruments
Language	English