Keithley 2651A Reference Manual page 661

Model 2651A High Power System SourceMeter® Instrument Reference Manual
The setting for mode can be one of the following values:
Mode
tsplink.TRIG_BYPASS
tsplink.TRIG_FALLING
tsplink.TRIG_RISING
tsplink.TRIG_EITHER
tsplink.TRIG_SYNCHRONOUSA
tsplink.TRIG_SYNCHRONOUS
tsplink.TRIG_SYNCHRONOUSM
tsplink.TRIG_RISINGA
tsplink.TRIG_RISINGM
When programmed to any other mode, the output state of the I/O line is controlled by the trigger logic, and the
user-specified output state of the line is ignored.
When the trigger mode is set to tsplink.TRIG_RISING, the user-specified output state of the line will be
examined. If the output state selected when the mode is changed is high, the actual mode used will be
tsplink.TRIG_RISINGA. If the output state selected when the mode is changed is low, the actual mode used
will be tsplink.TRIG_RISINGM.
The custom variable mode stores the trigger mode as a numeric value when the attribute is read.
To control the line state, use the tsplink.TRIG_BYPASS mode with the tsplink.writebit() and the
tsplink.writeport() commands.
Example
tsplink.trigger[3].mode =
tsplink.TRIG_RISINGM
2651A-901-01 Rev. A / March 2011
Number Description
value
Allows direct control of the line as a digital I/O line.
0
Detects falling-edge triggers as input. Asserts a TTL-low pulse
1
for output.
If the programmed state of the line is high, the
2
tsplink.TRIG_RISING mode behaves similar to
tsplink.TRIG_RISINGA. If the programmed state of the line
is low, the tsplink.TRIG_RISING mode behaves similar to
tsplink.TRIG_RISINGM. Use tsplink.TRIG_RISINGA if
the line is in the high output state. Use
tsplink.TRIG_RISINGM if the line is in the low output state.
Detects rising- or falling-edge triggers as input. Asserts a
3
TTL-low pulse for output.
Detects the falling-edge input triggers and automatically
4
latches and drives the trigger line low.
Detects the falling-edge input triggers and automatically
5
latches and drives the trigger line low. Asserts a TTL-low pulse
as an output trigger.
Detects rising-edge triggers as an input. Asserts a TTL-low
6
pulse for output.
Detects rising-edge triggers as input. Asserts a TTL-low pulse
7
for output.
Edge detection as an input is not available. Generates a
8
TTL-high pulse as an output trigger.
Section 7: Command reference
Sets the trigger mode for the
synchronization Line 3 to
tsplink.TRIG_RISINGM.
7-353