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Section 4: Triggering Series 2600B System SourceMeter® instrument Reference Manual

4-6 2600BS-901-01 Rev. F/August 2021

Each section of the trigger model performs a function:

Idle state

If a sweep is not in process, the SMU is in the idle state. Use the

smuX.trigger.initiate() function to move the SMU from the idle state to the arm

layer.

Arm layer

Begins a sweep. Each sweep starts and ends in the arm layer.

Trigger layer

All source, measurement, and pulse actions occur in the trigger layer.

▪ Source: Outputs the programmed voltage or current source value.

▪ Measurement: Where the current, voltage, resistance, and power

measurements occur.

▪ End pulse: The end pulse action sources the idle (or bias) level if the pulse mode

is enabled.

The remote trigger model dictates the sequence of operation for the SMU when it is configured to

perform a sweep. When the SMU comes to an event detector, it suspends operation and waits for the

event you have assigned to the stimulus input. If no event is assigned, the SMU continues

uninterrupted past the event detector and through the trigger model. When the SMU comes to an

action block, it performs the appropriate action, if enabled. The SMU loops through the arm and

trigger layers until the programmed arm and trigger counts are satisfied.

Configuring source and measure actions

You can configure the source action using any of the following functions:

smuX.trigger.source.linearY()

smuX.trigger.source.logY()

smuX.trigger.source.listY()

Where:

Y = Source function (v = voltage, i = current)

Source functions cannot be changed within a sweep.

To enable the source action, set the smuX.trigger.source.action attribute to smuX.ENABLE.

The source-measure unit (SMU) can be configured to perform any or all available measurements

during a sweep using the smuX.trigger.measure.Y() function. To enable the measure action for

a simple synchronous sweep, set the smuX.trigger.measure.action attribute to smuX.ENABLE.

To enable the measure action for an asynchronous sweep, set the

smuX.trigger.measure.action attribute to smuX.ASYNC.

In asynchronous mode, trigger your measurements before the source completes the sweep (before

the end sweep action occurs). If the source loop has completed its end sweep action, the measure

loop terminates unless the measure action block is actively measuring. If this is the case, the active

measurement is allowed to complete before returning to the arm layer.

Tektronix KEITHLEY 2600B Series User Manual

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