Section 7: TSP command reference
2606B System SourceMeter® Instrument Reference Manual
7-242
2606B-901-01 Rev. B / May 2018
smuX.trigger.source.limitY
This attribute sets the sweep source limit.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
SMU reset
Instrument reset
Recall setup
Not saved
0 (smuX.LIMIT_AUTO)
Usage
sweepSourceLimit
= smu
X
.trigger.source.limit
Y
smu
X
.trigger.source.limit
Y
=
sweepSourceLimit
sweepSourceLimit
The source limit that is used during triggered operation; set to:
A user-defined value
smu
X
.LIMIT_AUTO
smu
X
.LIMIT_OFF
(for
smu
X
.trigger.source.limiti
)
X
Source-measure unit (SMU) channel (for example,
smua.trigger.source.limitv
applies to SMU channel A)
Y
SMU output function (
v
= voltage,
i
= current)
Details
If this attribute is set to
smu
X
.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
smu
X.
source.limit
Y
) or the sweep limit
value (as specified by
smu
X
.trigger.source.limit
Y
). Note that 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.
To disable the source current limit during triggered operation, set the
smu
X
.trigger.source.limiti
attribute equal to
smu
X
.LIMIT_OFF
(or "
off
").
Example
smua.trigger.source.limitv = 10
Sets the voltage sweep limit
of SMU channel A to 10 V.
Also see
Configuring and running sweeps
(on page 3-27)
(on page 7-218)
(on page 3-30)
