Model 4200A-SCS Parameter Analyzer Reference Manual
Section 3: Source-measure hardware
4200A-901-01 Rev. C / February 2017
3-21
Figure 53: Full-Kelvin preamp - ground unit connections
Ground unit terminals and connectors
Refer to the
(on page 2-8) for the locations and configuration of the GNDU
terminals. Basic information about these connectors is summarized below. Refer to the
(on page 2-1) for additional information regarding ground unit signal
connections.
The maximum allowed voltage between circuit COMMON and chassis ground is ±32 VDC.
FORCE terminal
The FORCE terminal is a standard triaxial connector used as a return path for the SMU or
preamplifier FORCE current. The center pin is FORCE, the inner shield is GUARD, and the outer
shield is circuit COMMON.
The ground unit FORCE and GUARD signal terminals are connected to circuit COMMON.
SENSE terminal
The SENSE terminal is a standard triaxial connector used to apply the ground unit SENSE signal to
the DUT in a remote sense application. The center pin is SENSE, the inner shield is GUARD, and the
outer shield is circuit COMMON. When the ground unit SENSE signal is connected to a DUT, all
SMU/preamplifier measurements will be made relative to this DUT connection.
