In this section:
Models 4220-PGU and 4225-PMU ........................................... 1-1
Models 4220-PGU and 4225-PMU
The 4220-PGU High Voltage Pulse Generator Unit and 4225-PMU Ultra-Fast Pulse Measure Unit are
high-speed pulse-generator cards for the 4200A-SCS. The 4220-PGU provides pulse output only.
The 4225-PMU provides both pulse output and pulse measurement. The PGU and PMU have similar
pulse output characteristics.
The 4225-PMU can be paired with one or two 4225-RPM Remote Preamplifier/Switch Modules. The
RPM is a remote amplifier and automatic switch. When the RPM is used as a preamplifier for the
PMU, it provides additional low-current measurement ranges. When the RPM is used as a switch, it
switches between the PMU, SMUs, and CVUs.
LPT functions that pertain to the PGU and PMU are documented in “LPT commands for PGUs and
PMUs” in Model 4200A-SCS LPT Library Programming.
To do quick tests with minimal interaction with other 4200A-SCS test resources, you can use the
Keithley Pulse Application (KPulse). KPulse is a nonprogramming alternative that you can use to
configure and control the installed Keithley pulse cards. Refer to KPulse (on page 5-1
) for additional
information.
The simplified circuits of the 4220-PGU and 4225-PMU pulse generators are shown in the
following figure.
Section 1
Introduction
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