Details
Use this attribute to perform extended operating area pulse mode sweeps.
If this attribute is set to smuX.LIMIT_AUTO (or 0), the SMU uses the normal limit setting during
sweeping. If this attribute is set to any other numeric value, the SMU switches in this limit at the start
of the source action and returns to the normal limit setting at the end of the end pulse action.
Normally, the limit range is automatically adjusted in accordance with the limit value. During
sweeping, however, the limit range is fixed to avoid the delays associated with changing range. This
fixed limit range is determined by the maximum limit value needed during the sweep; that is, the
greater of either the normal limit value (as specified by smuX.source.limitY) or the sweep limit
value (as specified by smuX.trigger.source.limitY). The minimum limit value that can be
enforced during the sweep is equal to 10% of the full-scale value of the fixed limit range. If the smaller
limit value (normal or sweep) falls below this 10% threshold, the 10% value is enforced instead.
Likewise, if the limit value falls below the 10% threshold as a result of power compliance, the 10%
value is enforced instead.
When using the extended operating area, the SMU automatically starts the end pulse action if the
SMU is not triggered before its maximum pulse width. It also delays the source action if necessary to
limit the pulse duty cycle to stay within the capabilities of the SMU.
Example
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