Keithley 6482, Справочное руководство

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7-4 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 7: Sweep Operation Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
When this sweep is triggered to start, the output will go from the bias level to the start source level
(1 V) and sweep through the symmetrical logarithmic points. With trigger delay set to zero, the
time duration at each step is determined by the source delay and the time it takes to perform the
measurement (NPLC setting).
Custom sweep
This sweep type lets you configure a customized sweep. Programmable parameters include the
number of measurement points in the sweep and the voltage source level at each point.
When this sweep is started, the output goes from the bias level to the first voltage bias and
measure point in the sweep. The sweep will continue through the points in the order they were
programmed and stop after the last voltage bias and measure point. With trigger delay set to
zero (0), the time duration at each step is determined by the source delay and the time it takes to
perform the measurement (NPLC setting). This delay is the same for all sweep points.
Custom sweep examples
The custom sweep can be configured to provide a 50 percent duty cycle pulse sweep. Figure 7-3
shows a pulse sweep that provides three 1 V pulses on a 0 V bias level. This pulse sweep is
configured by specifying six points for the custom sweep. The specified voltage levels at points P0,
P2, and P4 are 1 V, and the specified voltage levels at points P1, P3, and P5 are 0 V. Six
measurements are performed for this sweep: Three at 1 V and three at 0 V.
Figure 7-3
Custom pulse sweep
Table 7-1
Logarithmic sweep points
Measure point
Logarithmic
step
Bias level (volts)
Point 1
Point 2
Point 3
Point 4
Point 5 0
0.25
0.50
0.75
1.0 1
1.7783
3.1623
5.6234
10
Delay
P1
Measure
#1
P0
Measure
#2
Delay
Measure
#3
Measure
#4
Measure
#5
Measure
#6
Bias 0 V
1V
Delay Delay
P3
Delay
P5
Delay
P2 P4
X
X
X
X
X
X