Keithley 2450 Reference Manual page 199

Section 3: Functions and features
Front-panel sweep options
Option
Type
Start
Stop
Definition
Step
Points
Source Delay
Count
3-54
Model 2450 Interactive SourceMeter® Instrument Reference Manual
Description
You can select one of the following options:
Linear: Sets up a linear staircase sweep.
•
Logarithmic: Sets up a logarithmic staircase sweep.
•
Linear Dual: Sets up a linear staircase sweep that runs from the start
•
source value to the stop source value, then runs from the stop value to the
start value.
Log Dual: Sets up a logarithmic staircase sweep that runs from the start
•
source value to the stop source value, then runs from the stop value to the
start value.
The voltage or current source level at which the sweep starts:
Current: -1.05 to 1.05
•
Voltage: -210 to 210
•
To set up an increasing sweep, set start level to be less than the stop level. To
set up a decreasing sweep, set the start level to be more than the stop level.
The voltage or current at which the sweep stops:
Current: -1.05 to 1.05
•
Voltage: -210 to 210
•
Determines if the sweeps is set up for a certain number of points or by a specific
step size. Select one of the following options:
Number of Points: When this option is selected, the instrument calculates
•
the number of source-measure points in the sweep using the following
formula:
Points = [(Stop - Start) / Step] + 1
Step Size: When this option is selected, the source level changes in equal
•
steps from the start level to the stop level. A measurement is performed at
each source step (including the start and stop levels).
To calculate the number of source-measure points in a sweep, use one of
the following formulas.
Linear sweep:
Logarithmic sweep:
Displayed if the sweep definition is set to Step Size.
Set the size that each step should be.
Displayed if the sweep definition is set to Number of Points.
Select the number of points that you want to measure in the sweep.
Sets the delay (settling time) for the source function.
How many times the sweep should repeat. You can select one of the following
options:
Finite: Set a specific number of times to repeat.
•
Infinite: The sweep will repeat until is it aborted.
•
2450-901-01 Rev. B/September 2013