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2
Operation and Features
Making measurements
The U2722A/U2723A has an excellent output voltage and current
measurement capability. All the measurements are performed by digitizing
the instantaneous output voltage or current for a defined number of
samples and sample interval, storing the results in a buffer, and then
calculating the measured result. The programmable parameters include the
number of samples and time interval between each sample.
N O T E
Voltage and current measurements
To measure the voltage or current for any output, use the following
commands.
MEAS:VOLT? (@<ch>)
MEAS:CURR? (@<ch>)
The result of MEAS:CURR? or MEAS:VOLT? is dependent on
• NPLC setting for voltage or current
• line frequency selection (SYSTem:LFREQuency <F50HZ|F60HZ>,
• latency time from many executable levels in the PC.
The maximum total time taken for measurements to complete if NPLC =
255 and Line Frequency = 50 Hz is calculated according to the following
formula.
Aperture time =
44
There is a trade-off between the programmable parameters and the speed,
accuracy, and stability of the measurements in the presence of noise.
(SENSe:VOLTage[:DC]:NPLCycles <integer>, (@1|2|3) or
SENSe:CURRent[:DC]:NPLCycles <integer>, (@1|2|3)) where
integer is from 0 to 255
(@1|2|3)) prior to making the measurement
Line frequency
255
NPLC
=
50
= 5.1 s
U2722A/U2723A User's Guide
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