Chapter 5 Connecting AI Signals on the USB-6210/6211 Devices
In the single-ended modes, more electrostatic and magnetic noise couples into the signal connections than in DIFF configurations. The coupling is the result of differences in the signal path. Magnetic coupling is proportional to the area between the two signal conductors. Electrical coupling is a function of how much the electric field differs between the two conductors.
With this type of connection, the NI-PGIA rejects both the common-mode noise in the signal and the ground potential difference between the signal source and the device ground.
Refer to the Using Referenced Single-Ended (RSE) Connections for Floating Signal Sources section for more information about RSE connections.
When to Use Non-Referenced Single-Ended (NRSE) Connections with Floating Signal Sources
Only use NRSE input connections if the input signal meets the following conditions.
•The input signal is high-level (greater than 1 V).
•The leads connecting the signal to the device are less than 3 m (10 ft).
DIFF input connections are recommended for greater signal integrity for any input signal that does not meet the preceding conditions.
In the single-ended modes, more electrostatic and magnetic noise couples into the signal connections than in DIFF configurations. The coupling is the result of differences in the signal path. Magnetic coupling is proportional to the area between the two signal conductors. Electrical coupling is a function of how much the electric field differs between the two conductors.
With this type of connection, the NI-PGIA rejects both the common-mode noise in the signal and the ground potential difference between the signal source and the device ground.
Refer to the Using Non-ReferencedSingle-Ended (NRSE) Connections for Floating Signal Sources section for more information about NRSE connections.