Keithley 2600a series - Figure

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 9-7
Series 2600A System SourceMeter® Instruments Reference Manual Section 9: Sweep Operation
Figure 9-5
Logarithmic staircase sweep (1V to 10V, five steps)
In this example:
A = 0, V
start
= 1, V
end
= 10, N = 5
Using the formula above k = 1
Step size (b) for the sweep in Figure 9-5 is calculated as follows:
Therefore, b = 10
(log step size)
= 1.7783
The five log steps for this sweep are listed in Table 9-1.
Delay
Delay
Delay
Delay
Stop
(10)
Measure
#1
Measure
#2
Measure
#3
Measure
#5
X = Measurement Point
X
X
X
X
Delay
X
Measure
#4
Log Points = 5
1
10
5.6234
3.1623
1.7783
Volts
Log
Scale
Start
Log Step Size
log10(stop-0) log10(start-0)–
Points 1–
-----------------------------------------------------------------------------=
log10(10) log10(1)–
51–
-----------------------------------------------------=
10–()
4
-----------------=
0.25=
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