Keysight Technologies USB data capturing module U2331A Input: 3 MS/s, output: 1 MS/s U2331A OPT 902 + ABD Manuale Utente
Codici prodotto
U2331A OPT 902 + ABD
Calibration
2
U2300A Series DAQ Service Guide
21
The following figure illustrates the connection of a floating
signal source to the U2300A series DAQ in differential input
mode. For floating signal sources, additional resistor is
needed at each channel to provide a bias return path. The
resistor value is equivalent to about 100 times the source
impedance. If the source impedance is less than 100 W, you
can connect the negative polarity of the signal directly to
AI_GND, as well as the negative input of the Instrumentation
Amplifier. The noise couples in differential input mode are
less compared to the single- ended mode.
signal source to the U2300A series DAQ in differential input
mode. For floating signal sources, additional resistor is
needed at each channel to provide a bias return path. The
resistor value is equivalent to about 100 times the source
impedance. If the source impedance is less than 100 W, you
can connect the negative polarity of the signal directly to
AI_GND, as well as the negative input of the Instrumentation
Amplifier. The noise couples in differential input mode are
less compared to the single- ended mode.
Figure 2-4
Floating source and differential input
N O T E
• Agilent U2300A series DAQ is designed with high input impedance.
Please ensure that all the connection are connected properly before
acquiring any data. Failing to do so may cause data fluctuation or
erroneous readings.
acquiring any data. Failing to do so may cause data fluctuation or
erroneous readings.
• Unused pins at multiplexing DAQ inputs can be treated as floating
source with infinite output impedance. Therefore, necessary grounding
system is required in user application system.
system is required in user application system.