2: Connections and configuration Model 4200A-SCS Parameter Analyzer
2-18 4200A-901-01 Rev. C / February 2017
Recommended connecting cables
To ensure accurate, reliable connections, use only quality, low-noise triaxial cables such as those
supplied with the SMU (4200-MTRX-X) and preamplifier (4200-TRX-X) for all source-measure signal
connections.
Refer to “Triaxial cables” in the 4200A-SCS User’s Manual for a complete description of
recommended triaxial cables. Refer to Pulse measure and pulse generator units (on page 5-1
) and
4210-CVU connections (on page 4-5) for connection information.
For optimum measurement accuracy, noise immunity, and settling time keep cables as short as
possible.
Test fixture and device under test (DUT) connections
The next table summarizes recommended Keithley Instruments test fixtures.
Test fixture Description DUT/fixture connections
Semiconductor test fixture
Component test fixture optimized for
device testing up to 200 V/1 A
Asserting the interlock allows the SMU and preamplifier terminals to become hazardous,
exposing the user to possible electrical shock that could result in personal injury or death.
SMU and preamplifier terminals should be considered hazardous even if the outputs are
programmed to be low voltage. Precautions must be taken to prevent a shock hazard by
surrounding the test device and any unprotected leads (wiring) with double insulation for
250 V, Category O.
Test fixtures
There are two types of test fixtures for the 4200A-SCS:
• Low-voltage fixtures (less than ±20 V).
• High-voltage fixtures (greater than ±20 V), which require extra precautions to ensure there are no
dangerous shock hazards.
To avoid high voltage exposure that could result in personal injury or death, whenever the
interlock of the 4200A-SCS is asserted, the FORCE and GUARD terminals of the SMUs and
preamplifier should be considered to be at high voltage, even if they are programmed to a
non-hazardous voltage current.
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