Keithley 2450 Reference Manual page 399

Section 6: SCPI command reference
Details
When the sweep is started, the instrument sources a specific voltage or current value to the device under test
(DUT). A measurement is made for each point of the sweep.
When the sweep command is sent, it creates a source configuration list and populates the trigger model. To run
the sweep, initiate the trigger model.
The sweep continues until the source outputs the specified stop level. At this level, the instrument performs
another measurement and then stops the sweep.
When you specify a delay, a delay block is added to the sweep trigger model. This delay is added to any source
delay you may have set. For example, if you set 10 ms for the source delay and 25 ms for the delay in the for the
log sweep command, the actual delay is 35 ms.
The range type specifies the source range that is used for the sweep. You can select the following options:
• Best fixed: The instrument selects a single fixed source range that accommodates all the source levels
in the sweep. This avoids overshoots during sweeps.
• Auto: The instrument automatically goes to the most sensitive source range for each source level in the
sweep.
• Fixed: The source remains on the range that is set when the sweep is started. If a sweep point that
exceeds the capability of the source range, the source outputs the maximum level for that range.
Example
*RST
SOUR:FUNC VOLT
SOUR:VOLT:RANG 20
SENS:FUNC "CURR"
SENS:CURR:RANG 100e-6
SOUR:SWE:VOLT:LIN 0, 10, 20, 1e-3, 1, FIXED
INIT
Also see
Sweep operation
6-82
Model 2450 Interactive SourceMeter® Instrument Reference Manual
(on page 3-51)
Reset the instrument to its
defaults.
Set the source function to voltage.
Set the source range to 20 V. Set
the measure function to current
with a range of 100 µA.
Set up a linear sweep that sweeps
from 0 to 10 volts in 20 points with
a source delay of 1 ms, a sweep
count of 1, and a fixed source
range.
Start the sweep.
2450-901-01 Rev. B/September 2013