National Instruments NI USB-621x - Manual (Page 7)

Contents
© National Instruments Corporation vii NI USB-621x User Manual
AI Pause Trigger Signal ..................................................................................4-23
Using a Digital Source ......................................................................4-23
Getting Started with AI Applications in Software.........................................................4-24
Chapter 5
Connecting AI Signals on the USB-6210/6211 Devices
Connecting Floating Signal Sources..............................................................................5-3
What Are Floating Signal Sources? ................................................................5-3
When to Use Differential Connections with Floating Signal Sources ............5-3
When to Use Referenced Single-Ended (RSE) Connections with
Floating Signal Sources ................................................................................5-3
When to Use Non-Referenced Single-Ended (NRSE) Connections
with Floating Signal Sources........................................................................5-4
Using Differential Connections for Floating Signal Sources ..........................5-5
Using Non-Referenced Single-Ended (NRSE) Connections for
Floating Signal Sources ................................................................................5-8
Using Referenced Single-Ended (RSE) Connections for Floating
Signal Sources ..............................................................................................5-9
Connecting Ground-Referenced Signal Sources ...........................................................5-9
What Are Ground-Referenced Signal Sources? ..............................................5-9
When to Use Differential Connections with Ground-Referenced
Signal Sources ..............................................................................................5-10
When to Use Non-Referenced Single-Ended (NRSE) Connections with
Ground-Referenced Signal Sources..............................................................5-10
When to Use Referenced Single-Ended (RSE) Connections with
Ground-Referenced Signal Sources..............................................................5-11
Using Differential Connections for Ground-Referenced Signal Sources........5-12
Using Non-Referenced Single-Ended (NRSE) Connections for
Ground-Referenced Signal Sources..............................................................5-13
Chapter 6
Connecting AI Signals on the USB-6215/6218 Devices
Differential Measurements ............................................................................................6-1
Differential Pairs............................................................................................................6-1
Referenced Single-Ended (RSE) Measurements ...........................................................6-3
Non-Referenced Single-Ended (NRSE) Measurements ................................................6-4