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Introduction .............................................................................................................. 1-1

Models 4220-PGU and 4225-PMU ...................................................................................... 1-1

Connections ............................................................................................................. 2-1

Introduction .......................................................................................................................... 2-1

Connection guidelines .......................................................................................................... 2-1

PMU common connections ....................................................................................................... 2-2

Shield connections .................................................................................................................... 2-2

Cable length .............................................................................................................................. 2-3

High frequency connections ...................................................................................................... 2-3

Prober chuck connections ......................................................................................................... 2-4

PGU and PMU connectors ................................................................................................... 2-4

Model 4225-RPM ................................................................................................................. 2-5

RPM input, output, and top panels ............................................................................................ 2-5

Connecting the RPM to the PMU .............................................................................................. 2-6

Mounting the RPM .................................................................................................................... 2-8

RPM diagrams for local and remote sensing............................................................................. 2-8

Using the RPM as a switch ....................................................................................................... 2-9

Two-terminal device connections ....................................................................................... 2-10

Three-terminal device connections .................................................................................... 2-12

Four-terminal device connections ...................................................................................... 2-13

Pulse source-measure connections ................................................................................... 2-15

Pulse generator connections ................................................................................................... 2-15

Using an adapter cable to connect pulse card to DUT ...................................................... 2-16

Connections to prober or test fixture bulkhead connectors ............................................... 2-16

RPM connections to DUT................................................................................................... 2-17

Two-terminal test connections ................................................................................................. 2-17

Remote sensing using RPM connections to a prober ............................................................. 2-18

PMU connection compensation ......................................................................................... 2-20

Short compensation ................................................................................................................ 2-20

Offset current compensation ................................................................................................... 2-21

Perform connection compensation .......................................................................................... 2-21

Enabling connection compensation ......................................................................................... 2-22

Load-line effect compensation (LLEC) for the PMU .......................................................... 2-24

Methods to compensate for load-line effect............................................................................. 2-25

How LLEC adjusts pulse output to the target levels ................................................................ 2-25

Coping with the load-line effect ............................................................................................... 2-27

LLEC maintains even voltage spacing .................................................................................... 2-27

Test considerations ................................................................................................................. 2-28

LPT functions used to configure LLEC .................................................................................... 2-29

Enable LLEC ........................................................................................................................... 2-29

Disable LLEC and set the output impedance .......................................................................... 2-30

Setting up PMUs and PGUs in Clarius .................................................................... 3-1

Introduction .......................................................................................................................... 3-1

Table of contents

Brand	Tektronix
Model	Keithley 4225-PMU
Category	Computer Hardware
Language	English

Tektronix Keithley 4225-PMU User Manual

Table of Contents

Questions and Answers:

Tektronix Keithley 4225-PMU Specifications