S-901-01 Rev. C / January - Keithley 2601 Reference Manual

Series 2600 System SourceMeter® Instruments Reference Manual
6. Turn output ON.
7. Range or function is altered.
8. Turn output OFF.
Source Range Change Rate
This test uses the previous setup to alternate between two source ranges.
The following shows how the results are obtained in Visual Basic. TestScript() is the setup script.
tstart = Timer
TransmitBuffer = "TestScript()" & CRLF
ReceiveBuffer = ""
VisaStatus = viWrite(VisaSession, TransmitBuffer, Len(TransmitBuffer), ReturnCount)
VisaStatus = viRead(VisaSession, ReceiveBuffer, MAX_ BUFFER, ReturnCount)
tstop = Timer
Result = NumPoints/ (tstop – start)
Measure Range Change Rate
This test method is the same as the Source Range Change Rate test, but this test alternates
between two measurement ranges.
Function Change Rate
This test method is the same as the Source Range Change Rate test, but this test alternates
between voltages and current.
Command Processing
This test has the following setup:
1. Set the source range to 1V, turning autorange off.
2. Set the source function to volts.
3. Turn output ON.
4. A series of smua.source.levelv() commands are sent out to alternate the smu voltage level
between 1V and 0V.
5. Time is recorded on the scope measuring the period between the time the GPIB ATN line
stops moving and when the output of the smu begins to change.
6. Turn output OFF.

2600S-901-01 Rev. C / January 2008

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Appendix E: Speed Specification Test Conditions
' NumPoints is the number of samples taken
E-7