Keysight Technologies 3458A Guide D'utilisation page 93

Configuring for Measurements 3
specify 10 PLCs, the integration time is 200 msec. In the power-on state,
integration time is set to 10 PLCs. In the PRESET NORM state, integration time is
set to 1 PLC. To set the integration time for the fastest measurements (with the
lowest accuracy, lowest resolution. and no NMR), send:
OUTPUT 722; "NPLC 0"
To specify the most accuracy, highest resolution, and 80 dB of NMR for DC or
ohms measurements (with the slowest measurement speed), send:
OUTPUT 722;"NPLC 1000"
You can specify power line cycles in the following ranges:
– 0 - 1 PLC (in .000006 PLC steps for 60 Hz ref. frequency or .000005 PLC steps
for 50 Hz ref. frequency)
– 1- 10 PLC in 1 PLC steps
– 10 - 1000 PLCs in 10 PLC steps
For integration times greater than 10 PLCs, the multimeter averages a number of
NOTE
readings made using 10 PLCs of integration time. For example, if you specify
60 PLCs, the multimeter averages six 10 PLC readings.
The wide range of PLC settings provides flexibility in the selection of measurement
speed. accuracy, resolution, and NMR. Typically, you should select the integration
time that provides adequate speed while maintaining an acceptable amount of
resolution and NMR. The specifications tables in Appendix A show the relationship
of integration time to digits of resolution and NMR for DC and ohms
measurements.
Specifying integration time directly
For DC or ohms measurements, you can specify the integration time directly (in
seconds) using the APER (aperture) command. For example, to specify 22 ms of
integration time, send:
OUTPUT 722;"APER.022"
Keysight 3458A User's Guide 93