Analog input signal connections, Analog input signal connections -11 – National Instruments 6023E User Manual
Page 41
Chapter 4
Signal Connections
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4-11
gain setting of the amplifier. The amplifier output voltage is referenced to
the ground for the device. The A/D converter (ADC) of your device
measures this output voltage when it performs A/D conversions.
Reference all signals to ground either at the source device or at the device.
If you have a floating source, reference the signal to ground by using the
RSE input mode or the DIFF input configuration with bias resistors (see the
Differential Connections for Nonreferenced or Floating Signal Sources
section). If you have a grounded source, do not reference the signal to
AIGND. You can avoid this reference by using DIFF or NRSE input
configurations.
Analog Input Signal Connections
The following sections discuss the use of single-ended and DIFF
measurements and recommendations for measuring both floating and
ground-referenced signal sources.
Figure 4-4 summarizes the recommended input configuration for both
types of signal sources.