Sweeps; Sweep Overview; Linear Staircase Sweep - Keithley 6220 DC User Manual

4-2

Sweeps

Sweep overview

As shown in
of DC current sweeps.
NOTE User setups cannot be saved or recalled while a sweep is

Linear staircase sweep

With this sweep type, the current increases or decreases in specific steps, begin-
ning with a start current and ending with a stop current.
increasing linear staircase sweep from a 1mA start current to a 5mA stop current
in 1mA steps. The bias current is the fixed current setting just prior to the start of
the sweep. The current output will remain at the last point in the sweep after com-
pletion.
Logarithmic staircase sweep
In this case, the current increases or decreases logarithmically, beginning with a
start current and ending with a stop current.
staircase sweep from a 0.1mA start current to a 100mA stop current with logarith-
mic steps. Again, the bias current is the fixed current setting just prior to the start
of the sweep. The current output will remain at the last point in the sweep after
completion.
Custom sweep
The custom sweep allows you to program arbitrary sweep steps anywhere within
the output current range of the Model 622x.
sweep with arbitrary steps. As with the other two sweep types, the bias current is
the fixed current setting just prior to the start of the sweep. The current output will
remain at the last point in the sweep after completion.
NOTE A custom sweep cannot be saved as a user setup.
Figure 4-1, the Model 622x Current Source can generate three types
armed or running. Attempting to do so will generate error
+413 Not allowed with mode arm.
Attempting to do so will generate error +528 Cannot save
CUSTOM sweep setup.
Return to Section 4 topics
Model 6220/6221 User's Manual
Figure 4-1A shows an
Figure 4-1B shows an increasing log
Figure 4-1C shows a typical custom