Keithley 4200A-SCS - Default Chapter; Table of Contents

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 ......................................................................................................... 2-3
PGU and PMU connectors ................................................................................................... 2-4
Model 4225-RPM ................................................................................................................. 2-4
RPM input, output, and top panels ............................................................................................ 2-4
Connecting the RPM to the PMU .............................................................................................. 2-6
RPM diagrams for local and remote sensing............................................................................. 2-7
Using the RPM as a switch ....................................................................................................... 2-8
Two-terminal device connections ......................................................................................... 2-9
Three-terminal device connections .................................................................................... 2-11
Four-terminal device connections ...................................................................................... 2-12
Pulse source-measure connections ................................................................................... 2-13
Pulse generator connections ................................................................................................... 2-13
Using an adapter cable to connect pulse card to DUT ...................................................... 2-14
Connections to prober or test fixture bulkhead connectors ............................................... 2-14
RPM connections to DUT................................................................................................... 2-15
Local sensing .......................................................................................................................... 2-15
RPM connections to a prober .................................................................................................. 2-16
PMU connection compensation ......................................................................................... 2-18
Short compensation ................................................................................................................ 2-18
Offset current compensation ................................................................................................... 2-19
Perform connection compensation .......................................................................................... 2-19
Enabling connection compensation ......................................................................................... 2-20
Load-line effect compensation (LLEC) for the PMU .......................................................... 2-21
Methods to compensate for load-line effect............................................................................. 2-22
How LLEC adjusts pulse output to the target levels ................................................................ 2-22
Coping with the load-line effect ............................................................................................... 2-24
LLEC maintains even voltage spacing .................................................................................... 2-25
Test considerations ................................................................................................................. 2-26
LPT functions used to configure LLEC .................................................................................... 2-26
Enable LLEC ........................................................................................................................... 2-27
Disable LLEC and set the output impedance .......................................................................... 2-28
Setting up PMUs and PGUs in Clarius .................................................................... 3-1
Introduction .......................................................................................................................... 3-1
Table of contents