Keithley 2600a series - Figure

9-6 Return to Section Topics 2600AS-901-01 Rev. B / September 2008
Section 9: Sweep Operation Series 2600A System SourceMeter® Instruments Reference Manual
Figure 9-4
Decreasing logarithmic sweep
Solving for k and b provides the following formulas:
k = V
start
- A
Where: V
end
is the source value at the end point.
V
start
is the source value at the start point.
N is the number of points in the sweep.
A is the asymptote value.
NOTE The number of points in a sweep is one greater than the number of
steps in the sweep.
Figure 9-5 is an example of a 5-point log sweep from 1V to 10V.
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
12345678
Point
8 to 2 with A = 0
8 to 2 with A = 1.8
8 to 2 with A = 8.5
b 10
log10(V
end
A)– log10(V
start
A)––
N 1–
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