Model 4200A-SCS Parameter Analyzer Reference Manual
Section 13: LPT library function reference
4200A-901-01 Rev. C / February 2017
13-181
Details
This command sets the 4210-CVU for auto range measurements. When
setauto
is called, the CVU
goes to the most sensitive range to make the measurement. Calling
devint
also selects autorange.
You can also use the
rangei
command to enable autorange, or select a fixed measurement range.
Autorange remains enabled until a fixed range is selected.
Example
(on page 13-194) 2 through 5 use auto range for impedance measurements.
Also see
(on page 13-13)
(on page 13-179)
setfreq
This command sets the frequency for the AC drive.
Usage
int setfreq(int
instr_id
, double
frequency
);
instr_id
The instrument identification code of the 4210-CVU:
CVU1
frequency
Frequency of the AC drive
Details
This command sets the frequency of the AC drive. The 4210-CVU provides test frequencies from
1 kHz to 10 MHz in the following steps:
•
1 kHz through 10 kHz in 1 kHz steps
•
10 kHz to 100 kHz in 10 kHz steps
•
100 kHz to 1 MHz in 100 kHz steps
•
1 MHz to 10 MHz in 1 MHz steps
If an entered value is not a supported frequency, the closest supported frequency is selected (for
example, 15 kHz input selects 20 kHz). You can use the
getstatus
command to retrieve the
selected frequency value.
AC drive (AC voltage level and frequency) does not turn on until a measurement is made. AC drive
turns off after the measurement is completed. The DC voltage source stays on for the whole test.
Example
(on page 13-194) 1, 2, 4 and 5 use the
setfreq
command to set the AC
drive frequency.
Also see
(on page 13-176)
(on page 13-182)
