Section 13: LPT library function reference
Model 4200A-SCS Parameter Analyzer Reference Manual
13-174
4200A-901-01 Rev. C / February 2017
dsweepv
This command performs a dual linear staircase voltage sweep.
Usage
int dsweepv(int
instr_id
, double
startv
, double
stopv
, long
numSteps
, double
delaytime
);
instr_id
The instrument identification code of the 4210-CVU:
CVU1
startv
Initial force value for the sweep (
−
30 V to 30 V)
stopv
Final force value for the first sweep (
−
30 V to 30 V)
numSteps
Sets the number of points in the sweep (1 to 4096); see
Details
delaytime
Delay before each measurement (0 to 999 s)
Details
This command is used to perform a dual staircase sweep (see the figure below). The linear step size
to sweep is set using the
startv
,
stopv
, and
NumSteps
parameters. The linear step size for the
sweep is then calculated as follows:
StepSize (in volts) = (
stopv
–
startv
) / (
numSteps
)
numSteps
describes the first half of the sweep. For example, to do a dual sweep from 1 V to 10 V
and back down in 1 V steps, set
numSteps
to 10. The result is a 20-point sweep (10 up and 10
down).
The first sweep can step forward (low voltage to high voltage) or it can step in reverse (high voltage to
low voltage). After performing the first sweep, the second sweep will repeat in the reverse direction.
For example, if configured to sweep from 1 V to 10 V, the second sweep will start at 10 V and step
down to 1 V.
The
delayTime
parameter sets the delay that occurs before each measurement. Note that there is
an inherent system overhead delay on each step of the sweep.
Use the
setfreq
and
setlevel
commands to set the AC drive frequency and voltage for the
sweep.
Use the
sweepv
command to perform a single linear staircase voltage sweep.
Example
