The power limit check is performed in both ITMs and UTMs. In ITMs, exceeding the power limit will
display a message similar to the one shown in the following figure when configuring PMU.
Figure 81: ITM maximum power exceeded message
For UTMs, the message appears in the Clarius Messages pane.
Pulse source-measure concepts
Ultra-fast I-V sourcing and measurement have become increasingly important capabilities for many
technologies, including compound semiconductors, medium-power devices, nonvolatile memory,
microelectromechanical systems (MEMs), nanodevices, solar cells, and CMOS devices. Using pulsed
I-V signals to characterize devices rather than DC signals makes it possible to study or reduce the
effects of self-heating (joule heating) or to minimize current drift or degradation in measurements due
to trapped charge. Transient I-V measurements allow scientists and engineers to capture ultra
high-speed current or voltage waveforms in the time domain or to study dynamic test circuits. Pulsed
sourcing can be used to stress test a device using an AC signal during reliability cycling or in a
multi-level waveform mode to program or erase memory devices. The 4225-PMU Ultra-Fast I-V
Module for the 4200A-SCS supports many of these high-speed sourcing and measurement
applications.