Logarithmic Staircase Sweep; Setting Up A Sweep - Keithley 2450 Reference Manual

Section 3: Functions and features

Logarithmic staircase sweep

A logarithmic staircase sweep is similar to a linear staircase sweep. The only difference is that the
steps are scaled logarithmically.
The steps in a logarithmic staircase sweep increase or decrease geometrically, beginning with a start
voltage or current and ending with a stop voltage or current. The figure below shows an increasing
logarithmic staircase sweep.

Setting up a sweep

Defining and generating a sweep creates a new trigger model that will replace an existing trigger
model. If you want to preserve the existing trigger model, save a user-saved setup. See
setups (on page 2-112) for information on saving an existing trigger model as part of a user-saved
setup.
Before setting up the sweep, set up the instrument for the test you will run. Typical settings you can
set for a sweep include:
•
The source function
•
The measure function
•
Current or voltage limit
•
Source readback
•
Voltage protection limits
•
2-wire or 4-wire sense mode
•
Front or rear terminal selection
If you change settings after you set up a sweep, those changes will also affect the sweep the next
time it is initiated.
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Model 2450 Interactive SourceMeter® Instrument Reference Manual
Figure 88: Logarithmic staircase sweep
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2450-901-01 Rev. B/September 2013