Tektronix Keithley 4225-PMU - PMU Block Diagram

Section
4: Pulse card concepts Model 4200A-SCS Pulse Card (PGU and PMU)
User's Manual
4-2 4200A-PMU-900-01 Rev. B March 2023
The simplified circuits of the 4220-PGU and 4225-PMU pulse generators are shown in the
following figure.
Figure 76: Simplified circuits of the PGU and PMU
PMU block diagram
The following figure shows the block diagram of the PMU. Each channel has two dedicated A/D
converters to simultaneously measure current and voltage. The PMU controller controls the two
output channels and any RPMs connected to it. The solid-state relays (SSRs) are high-speed and are
used to test flash memory. The mechanical output relays are low-leakage. The block diagram for the
PGU is similar, except it does not have measure capability and does not have the RPM connectors.
Figure 77: 4225-PMU block diagram