Specifications

3-6 Agilent 4155B/4156B Quick Start Guide, Edition 2
Analyzing the Results
7. Select LINE secondary softkey so that ON appears on the softkey. The LINE
softkey is highlighted, and a vertical line appears in the center of the plotting
area.
8. Select TANGENT MODE secondary softkey. The line becomes tangent to the o
marker of the Y1 curve.
Read the X-axis intercept value of the tangent line. This is the threshold voltage
(Vth). In the example above, Vth is 935 mV.