Keithley 6482, Reference Manual

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9-4 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 9: Measurement Concepts Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Figure 9-3
Basic sweep waveform types
Typical sweep applications
Typical applications for staircase sweeps include I-V curves. The custom sweep can be used to
configure a pulse sweep with a 50 percent duty cycle. For example, a 10 V pulse sweep can be
configured by programming the odd numbered points for 10 V and the even numbered points for 0
V. When the sweep is run, the output will alternate between 10 V and 0 V.
Sweep data storage
For a sweep that has a finite sweep count, the data will be automatically stored in the buffer. This
data can be accessed from the front panel or sent to a computer (remote operation) for evaluation
(plotting). Statistical information on readings stored in the buffer are also available from the front
panel or over a remote interface.
Bias source operating boundaries
Limit lines
Figure 9-4 shows the operating boundaries (limit lines) for the voltage bias sources in the first
quadrant (both voltage and current positive). Operation in the third quadrant (both voltage and
current negative) is similar. Note that each voltage bias source can output a maximum of ±30 V at
±20 mA. Although the voltage value can be set over a range of ±30 V, the current compliance is
fixed at 20 mA.
Linear staircase sweep
Logarithmic staircase sweep
Custom sweep
Bias
Start
Stop
Bias
First point Last point
Bias
Start
10
1
0.1
Stop
Logarithmic scale
shown for staircase steps.