Model 4200A-SCS Parameter Analyzer Reference Manual
Section 13: LPT library function reference
4200A-901-01 Rev. C / February 2017
13-179
Details
This command makes a single impedance measurement.
Before calling
measz
, use the
forcev
command to set the DC bias level, the
setfreq
command to
set the AC drive frequency, and the
setlevel
command to set the AC drive voltage.
The parameter values for the measurement
model
are listed in the following table.
Measurement model parameter values
Measurement model
Parameter value
ZTH
Impedance (Z) and phase (
θ in degrees)
KI_CVU_TYPE_ZTH
or
0
RjX
Resistance and reactance
KI_CVU_TYPE_RJX
or
1
CpGp
Parallel capacitance and conductance
KI_CVU_TYPE_CPGP
or
2
CsRs
Series capacitance and resistance
KI_CVU_TYPE_CSRS
or
3
CpD
Parallel capacitance and dissipation factor
KI_CVU_TYPE_CPD
or
4
CsD
Series capacitance and dissipation factor
KI_CVU_TYPE_CSD
or
5
Use the
smeasz
or
smeaszRT
command to measure and return the impedance readings for a
sweep.
Also see
(on page 13-175)
(on page 13-181)
(on page 13-182)
(on page 13-182)
(on page 13-189)
(on page 13-191)
rangei
This command selects an impedance measurement range.
Usage
int rangei(int
instr_id
, double
range
);
instr_id
The instrument identification code of the 4210-CVU:
CVU1
range
Impedance measure range (0, 1 µA, 30 µA, or 1 mA)
Details
Use this command to set the 4210-CVU to a current measure range for impedance measurements.
Setting
range
to 0 selects auto range. The CVU automatically goes to the most sensitive (optimum)
range to make the measurement. This is the same as calling the
setauto
command.
The other
range
parameter values select a fixed measure range. The CVU remains on the fixed
range until auto range is enabled or the CVU is reset (
devint
called).
