Model 2651A High Power System SourceMeter® Instrument User's Manual
Section 6: Characterization of power discretes
Configuring the trigger model
Correctly configuring the trigger model allows you to achieve pulsed measurements with precise
timing and current levels up to 50 A on the Model 2651A. The following figure illustrates this test's
overall trigger model configuration, including the interactions between the Model 2651A and the
Series 2600A instrument. Refer to the
(on page 6-10) for an implementation
of this trigger model.
In this example, the trigger model of each instrument is configured to perform a linear sweep.
The Series 2600A is configured to sweep the voltage applied to the gate of the device.
The Model 2651A is configured to sweep the voltage across the drain (or collector) of the device. The
Model 2651A is configured to repeat its sweep and will do so as many times as there are steps in the
sweep of the Series 2600A.
For example, if the Model 2651A instrument’s sweep contains four points and the Series 2600A
instrument’s sweep contains three points, the Model 2651A instrument’s sweep will run three times,
for a total of 12 points. To synchronize the sweeps between instruments, the trigger lines of the TSP-
Link
®
interface are used. The following figure illustrates the 12-point sweep example.
Figure 18: SMU output from configured trigger model
Gate
(Series 26xxA)
Drain
or Collector
(Model 2651A)
4V
0V
4V
0V
2651A-900-01 Rev. A / March 2011
6-5
