Agilent Technologies B1500A Training Manual page 81

Class Exercise
Measurements Near Zero fA
You will be able to answer the following questions:
What does a sweep into an open SMU port look like?
What is the time per meas using PLC integration?
Add a 1.5 m cable during a sweep...how long to settle?
Move and bend the cable...how much current flows?
To Get Started:
Use the next several pages as your guide
Remove any cable attached to SMU4
Measure SMU4 noise level using the setup shown
The following pages lead you step-by-step through the "ZERO CHECK" class exercise. This is the
logical place to start if you are debugging a "noisy" test environment.
You will create an algorithm to look at the low level measurement capability of a SMU. On the next
page you will see the expected curve when looking into an open at the rear panel.
6-9
Module 6
Low Current Measurement