National Instruments PCI-6251 User Manual page 8

Connecting Ground-Referenced Signal Sources .............................................................. 4-17
What Are Ground-Referenced Signal Sources? ....................................................... 4-17
When to Use Differential Connections with Ground-Referenced Signal
Sources .................................................................................................................. 4-18
When to Use Non-Referenced Single-Ended (NRSE) Connections with
Ground-Referenced Signal Sources ...................................................................... 4-18
When to Use Referenced Single-Ended (RSE) Connections with
Ground-Referenced Signal Sources ...................................................................... 4-19
Using Differential Connections for Ground-Referenced Signal Sources................. 4-19
Using Non-Referenced Single-Ended (NRSE) Connections for
Ground-Referenced Signal Sources ...................................................................... 4-20
Field Wiring Considerations............................................................................................. 4-21
Analog Input Timing Signals ........................................................................................... 4-21
AI Sample Clock Signal ........................................................................................... 4-23
Using an Internal Source .................................................................................. 4-24
Using an External Source ................................................................................. 4-24
Routing AI Sample Clock Signal to an Output Terminal................................. 4-24
Other Timing Requirements ............................................................................. 4-24
AI Sample Clock Timebase Signal........................................................................... 4-25
AI Convert Clock Signal .......................................................................................... 4-25
Using an Internal Source .................................................................................. 4-26
Using an External Source ................................................................................. 4-26
Routing AI Convert Clock Signal to an Output Terminal................................ 4-26
Using a Delay from Sample Clock to Convert Clock ...................................... 4-27
Other Timing Requirements ............................................................................. 4-27
AI Convert Clock Timebase Signal.......................................................................... 4-29
AI Hold Complete Event Signal ............................................................................... 4-29
AI Start Trigger Signal ............................................................................................. 4-29
Using a Digital Source...................................................................................... 4-29
Using an Analog Source ................................................................................... 4-30
Routing AI Start Trigger to an Output Terminal.............................................. 4-30
AI Reference Trigger Signal..................................................................................... 4-30
Using a Digital Source...................................................................................... 4-31
Using an Analog Source ................................................................................... 4-31
Routing AI Reference Trigger Signal to an Output Terminal .......................... 4-31
AI Pause Trigger Signal ........................................................................................... 4-31
Using a Digital Source...................................................................................... 4-32
Using an Analog Source ................................................................................... 4-32
Routing AI Pause Trigger Signal to an Output Terminal................................. 4-32
Getting Started with AI Applications in Software............................................................ 4-32
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