4200-900-01 Rev. K / February 2017 Return to Section Topics 1-13
Model 4200-SCS User’s Manual Section 1: Getting Started
SENSE terminal
The SENSE terminal is a miniature triaxial connector used to apply the SMU SENSE signal to the
DUT in a remote sense application when the preamp is not being used.
• The center pin is SENSE
• The inner shield is GUARD
• The outer shield is circuit COMMON
Nominal internal auto-sense resistance appears between SENSE and FORCE.
NOTE The SENSE terminal does not need to be connected to the DUT for the SMU to
operate correctly. Remote sensing is automatic. If SENSE is connected to the DUT,
errors due to voltage drops in the FORCE path between the SMU and the DUT will be
eliminated; and, the SMU will sense locally.
SENSE LO terminal
The SENSE LO terminal is a miniature triaxial connector used to apply the SMU SENSE LO signal
to the DUT in a full-Kelvin remote sense application.
• The center pin is SENSE LO
• The inner shield is SENSE GUARD
• The outer shield is circuit COMMON
Nominal internal auto-sense resistance appears between SENSE LO GUARD and COMMON.
NOTE The remote sense capability of the ground unit should be used instead of the SENSE
LO of a SMU. If you need to use the SENSE LO terminal of a SMU, the SENSE LO
terminals of all SMUs being used in that 4200-SCS should be connected to the DUT.
PA CNTRL connector
The PA CNTRL (preamp control) terminal is a 15-pin D connector that provides both power and
signal connections to the 4200-PA remote preamp. The preamp can either be mounted and
connected directly to the SMU, or it can be connected to the SMU using a cable (4200-RPC-X)
when mounted remotely. Refer to SMU with Model 4200-PA overview for more information about
the preamp.
SMU with Model 4200-PA overview
Basic SMU/preamp circuit configuration is shown in Figure 1-10. This configuration is similar to the
SMU configuration discussed earlier, exception the preamp, which adds low-current
source-measure capabilities.
NOTE The preamp FORCE terminal is connected to DUT HI, while DUT LO is connected to
COMMON.
See the Reference Manual, Basic source-measure connections, page 4-3, and Reference Manual,
Source-Measure Concepts, page 5-1, for more source-measure details.
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