Keithley 2601B Reference Manual page 159

Section 3: Functions and features Series 2600B System SourceMeter® Instrument Reference Manual
The asymptote is used to change the inflection of the sweep curve and allow it to sweep through
zero. Both of the following figures depict the effect of the asymptote on the inflection of the sweep
curve. The following two figures show sample sweeps.
Figure 56: Increasing logarithmic sweep
Figure 57: Decreasing logarithmic sweep
3-24 2600BS-901-01 Rev. B / May 2013