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4-14 Agilent E5250A User’s Guide, Edition 9
Setting up Measurement Environment
Mounting Connectors Directly
For highly accurate current forcing and measurements while minimizing leakage,
surround all force and sense lines from SMU by a guard as far as possible, and make
cables stable by taping.
For reducing capacitance measurement error, tape the cables to any grounded
materials such as shielding box. If you use probe card, grounding the probe card also
reduces capacitance measurement error.
NOTE Low-Noise Coaxial Cable
When you make a SMU output connection by using low-noise coaxial cable
(Agilent part number: 8121-1191), shave the Conductive layer and the Insulator
(clear) by knife so that the Center Conductor is insulated from the Conductive layer.
Refer to following figure.
Insulator (black)
Outer conductor
(for Guard signal)
Insulator (clear)
Conductive layer (black)
Center conductor
(for Force/Sense signal)
approx. 10 to 15 mm
min 2 mm
Cover here using sleeve