Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 6:
SCPI command reference
2461-901-01 A/November 2015 6-157
Details
This command returns the number of readings stored in the buffer.
Example
TRACe:MAKE "testData", 200
COUN 10
MEASure:CURRent? "testData"
Creates 200 element reading buffer named testData.
Set the measurement count to 10.
Set the measurement function to current. Make readings, and
store the readings in testData. Returns the 10
th
measurement reading after taking all 10 readings.
:TRACe:ACTual?
Returns the number of readings in defbuffer1.
Example output:
850
:TRACe:ACTual? "testData"
Returns the number of readings in the buffer testData.
Example output:
10
Also see
Reading buffers (on page 3-2)
Remote buffer operation (on page 3-23)
:TRACe:MAKE (on page 6-165)
:TRACe:ACTual:END?
This command indicates the last index in a reading buffer.
Type Affected by Where saved Default value
Query only
Recall settings
Instrument reset
Power cycle
Not applicable Not applicable
Usage
:TRACe:ACTual:END?
:TRACe:ACTual:END? "<bufferName>"
<bufferName>
A string that indicates the reading buffer; the default buffers (defbuffer1 or
defbuffer2) or the name of a user-defined buffer; if no buffer is specified,
defbuffer1 is used
Details
Use this command to find the ending index in a reading buffer.

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV