E-2 Speed Specification Test Conditions Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006 Return to Appendix E topics
Introduction
The purpose of this appendix is to provide a general procedure for obtaining
speed results similar to those listed in the Series 2600 Specifications in
Appendix A. Tests were performed using Visual Basic and VISA calls.
Test system used
PC Hardware: Pentium IV 2.4 GHz, 512MB RAM, National Instruments
PCI-GPIB
Series 2600 Unit: Model 2602 (test runs on smuA only)
Software: Microsoft Windows 2000, Microsoft Visual Basic 6.0,
VISA version 3.1
Drivers: (PCI-GPIB) NI-488.2 version 2.2
Overview
Speed tests are separated into four categories: Sweep Operation Rates, Single
Operation Rates, Function/Range Change Rates, and Command Processing.
More detail on the tests is provided in the following paragraphs.
Sweep Operation Rate tests use a script to set up the instrument to record a large
number of measurements. The script sends a single print command at the end of
the test to signal the test program when it is done. Single Operation Rate tests
also use a script to send out measure commands. Samples are received one at a
time from the test program instead of collected inside a script. Function/Range
Change Rate tests measure the time it takes to change either a function or range.
Command Processing tests measure the time it takes to receive and process a
command.
Sweep Operation Rates
The procedure for Sweep Operation Rates test is listed below:
1. Short pins 1 and 2 of the digital I/O connector and power on the unit. Tests
involving the digital I/O include time to receive a trigger from pin 2 to pin 1.
2. A script puts the Series 2600 into a known test state, maximizing
performance of the instrument. It is sent to the instrument but not yet
executed. A large number of samples are taken once the script is run. This
is necessary to minimize error due to resolution of the Timer() function in
Visual Basic.
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