Guard Connections - Keithley 4200-SCS Reference Manual

Section 5: Source-Measure Concepts

Guard connections

GUARD is available at the inner shield of the FORCE and SENSE triax connectors for both the
SMU and the preamp, as shown in
DUT. Note that GUARD is not connected in this example, but it can be routed internally to a test
fixture as covered in
Figure 5-1

GUARD connections

FORCE
GUARD
COMMON
Triax
Cable
Conductors
5-4
Figure
Test fixture guarding
SMU or PreAmp Triax Connectors
FORCE
A. Connectors
FORCE or SENSE
GUARD
COMMON
B. Cable Connections
Return to Section Topics
5-1A. Figure 5-1B shows triax cable connections to the
later in this section.
SENSE
SENSE
COMMON
Model 4200-SCS Reference Manual
GUARD
DUT
4200-901-01 Rev. S / May 2017