Model 4200A-SCS Parameter Analyzer Reference Manual
Section 9: Keithley External Control Interface (KXCI)
4200A-901-01 Rev. C / February 2017
9-23
FS
This command sets the offset value when
VAR1'
is a selected source function.
Usage
FS ±
AAA.A
FS ±
AAA.A
,
B
AAA.A
Offset value:
−
210 to 210
B
Available SMU channel (1 to 9); if this parameter is not included, offset applies to all
channels that are configured to
VAR1'
.
Details
When
VAR1'
is a selected source function, it does the
VAR1
sweep with each step scaled by the ratio
(RT) value and offset (FS) value as follows:
VAR1'
sweep step = (
VAR1
sweep step x RT) + FS
The VAR1 sweep shown in the example in
(on page 9-17) has five steps: 1 V, 2 V, 3 V,
4 V, and 5 V. The corresponding
VAR'
sweep has the following steps when RT=3 and FS = 2:
VAR1'
step 1 = (1 V
×
3) + 2 = 5 V
VAR1'
step 2 = (2 V
×
3) + 2 = 8 V
VAR1'
step 3 = (3 V
×
3) + 2 = 11 V
VAR1'
step 4 = (4 V
×
3) + 2 = 14 V
VAR1'
step 5 = (5 V
×
3) + 2 = 17 V
This
VAR1'
sweep (not drawn to scale) is shown in the following figure.
Figure 467: VAR' sweep when ratio = 3 and full-scale = 2
You can assign a unique offset value to any available SMU channel in the system.
Example
RT +3,2
Ratio
FS +2,2
Offset
These command strings set up the
VAR1'
sweep shown in the figure in the Details (ratio = 3, offset = 2).
The above commands set up
VAR1'
for SMU Channel 2. When Channel 2 is defined for a
VAR1'
sweep,
ratio is set to 3 and offset is set to 2.
Also see
None
