Keithley 4200A-SCS Reference Manual page 729

Section 9: Keithley External Control Interface (KXCI) Model 4200A-SCS Parameter Analyzer Reference Manual
When VAR1 is a selected source function, it does a sweep that is synchronized to the steps of the
VAR2 step function. The VAR1 sweep is repeated whenever VAR2 goes to a new step value, as
shown in the following figure.
Figure 465: Synchronized VAR1 sweeps and VAR2 steps
9-18 4200A-901-01 Rev. C / February 2017