Keysight Technologies B1500A Self-Paced Training Manual page 87

Module 2
Basic Measurement
Above 1 nA guarding is of little use. Cable capacitance has a negligible effect on the bias port. Use
the floating guard triax(m) to BNC(f) adapter at the B1500A rear panel. Then use standard coax
BNC cables. Use sense to minimize series resistance error. 100 mV errors can occur in bias voltages
if remote sensing is not used.
Some recent bias tees from Keysight Technologies are specially designed to mate easily to triax
SMU ports.
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