Agilent 4155B/4156B Quick Start Guide, Edition 2 2-11
Making a Measurement
Step 4. Define the user functions
The above screen defines the following two user functions:
SQID = ÖId
DSQID = ¶SQID / ¶Vg = ¶ÖId / ¶Vg
Where, Id is drain current and Vg is gate voltage.
