Section 5
Capturing high power pulse waveforms
In this section:
Introduction to capturing waveforms ........................................ 5-1
Equipment needed for this example......................................... 5-1
Set up communication.............................................................. 5-1
Device connections .................................................................. 5-2
Configuring the trigger model ................................................... 5-2
Example program code ............................................................ 5-4
Example program usage .......................................................... 5-9
Introduction to capturing waveforms
The Model 2651A High Power System SourceMeter
®
Instrument offers a unique feature. In addition to
a traditional integrating ADC, the Model 2651A also features a fast-sampling ADC. The fast ADC of
the Model 2651A allows the instrument to take measurements at high speed, with capabilities similar
to an oscilloscope. This allows you to capture data at up to one million samples per second with more
than 5000 readings in a single burst. This feature allows simultaneous current and voltage
measurements without any additional hardware, and offers 18-bit resolution providing for high
accuracy, even at high speed. The fast ADC of the Model 2651A allows this instrument to be used in
a broad range of applications, such as negative bias temperature instability (NBTI) testing and
transient thermal analysis.
In this example, we will demonstrate how to use the fast ADC of the Model 2651A to capture both the
current and voltage waveforms of high power pulses.
Equipment needed for this example
To run this test, you will need the following equipment:
•
Model 2651A High Power System SourceMeter
®
Instrument
•
GPIB cable or Ethernet cable to connect the Model 2651A to a computer
•
Additional cable and connector assemblies as required to make connections to the device under
test (DUT) (for example, Model 2651A-KIT); see
(on page 5-2) for a
schematic of required connections
Set up communication
The communication setup is illustrated in the following diagram. GPIB is used as an example, but this
application can be run using any of the supported communication interfaces for the instrument.
