Keithley 2657A, Reference Manual, Page: 551 / 805

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-238 2657A-901-01 Rev. B/December 2012
smuX.trigger.measure.Y()
This function configures the measurements that are to be made in a subsequent sweep.
Type TSP-Link accessible
Affected by Where saved Default value
Function
Yes
Usage
smu
X
.trigger.measure.
Y
(
rbuffer
)
smu
X
.trigger.measure.iv(
ibuffer
,
vbuffer
)
X
Source-measure unit (SMU) channel (for example,
smua.trigger.measure.v()
applies to SMU channel A)
Y
SMU measurement type (
v
= voltage,
i
= current,
r
= resistance,
p
= power)
rbuffer
A reading buffer object where the readings will be stored
ibuffer
A reading buffer object where current readings will be stored
vbuffer
A reading buffer object where voltage readings will be stored
Details
As measurements are made, they are stored in a reading buffer. If the instrument is configured to return multiple
readings where one is requested, the readings will be available as they are made. Measurements are in the
following units of measure:
v
= volts,
i
= amperes,
r
= ohms,
p
= watts.
The
smu
X
.trigger.measure.iv()
function stores current readings in
ibuffer
and voltage readings in
vbuffer
.
If a given reading buffer contains any data, it is cleared before making any measurements, unless the reading
buffer has been configured to append data.
The SMU only retains the last call to any one of these functions and only that measurement action is performed.
After configuring the measurements to make with this function, remember to enable the measurement action by
setting
smu
X
.trigger.measure.action
=
smu
X
.ENABLE
.
Example
smua.trigger.measure.v(vbuffername)
smua.trigger.measure.action = smua.ENABLE Stores voltage readings during the
sweep for SMU channel A in buffer
vbuffername
.
Also see
Reading buffers (on page 3-6)
smuX.measure.Y() (on page 7-208)
smuX.nvbufferY (on page 7-210)
smuX.trigger.measure.action (on page 7-235)
Sweep Operation (on page 3-19)
Triggering (on page 3-31)
waitcomplete() (on page 7-371)
smuX.trigger.MEASURE_COMPLETE_EVENT_ID
This constant contains the measurement complete event number.
Type TSP-Link accessible Affected by Where saved Default value
Constant Yes