Logarithmic Sweep - Keithley 2500 User Manual

Models 2500 and 2502 User's Manual

Logarithmic sweep

Logarithmic sweep from 10V to 100V in 20 points:
*RST
SOUR1:SWE:SPAC LOG
SOUR1:VOLT:STAR 1
SOUR1:VOLT:STOP 100
SOUR1:SWE:POIN 20
TRIG:COUN 20
SOUR1:VOLT:MODE SWE
OUTP1 ON
INIT
To determine the source values that will be generated:
Start: 10
Stop: 100
LogStep = (Log
Now add the LogStep value to Log
a list of Log
values:
Value#
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Log (Start): 1
10
Log (Stop): 2
10
(Start) - Log
10 10
= (2-1) / (20 - 1)
= 1/ 19
= 0.105263
values. Next take the anti-log of each Log
10
Log Value
10
1 1.0000000
2 1.0526316
3 1.1052632
4 1.1578948
5 1.2105263
6 1.2631579
7 13157895
8 1.3684211
9 1.4210527
10 1.4736842
11 1.5263158
12 1.5789474
13 1.6315790
14 1.6842105
15 1.7368421
16 1.7894737
17 1.8421053
18 1.8947369
19 1.9473684
20 2.0000000
SCPI Command Reference
(Stop)) / (SWE:POIN -1)
(Start) and to each subsequent result. This will create
10
Sweep Value (V)
10.000000
11.288379
12.742751
14.384501
16.237767
18.329807
20.691382
23.357217
26.366513
29.763514
33.598184
37.926905
42.813329
48.329299
54.555947
61.584823
69.519286
78.476007
88.586675
100.00000
value to get the actual sweep
10
17-73