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Chapter 2 Analog Input

E Series User Manual 2-44 ni.com

Figure 2-32. ai/SampleClock and ai/ConvertClock Signals

ai/ConvertClock

ai/SampleClock

12 3

Sample Clock too fast for Convert Clock.

Sample Clock pulses are gated off.

ai/ConvertClock

ai/SampleClock

12 3

Convert Clock too fast for Sample Clock.

Convert Clock pulses are gated off.

ai/ConvertClock

ai/SampleClock

123

Improperly matched Sample Clock and Convert Clock.

Leads to aperiodic sampling.

ai/ConvertClock

ai/SampleClock

12 3

Properly matched Sample Clock and Convert Clock.

Table of Contents6
About this Manual13
Conventions13
Related Documentation14
NI-DAQ for Windows14
NI-Daqmx for Linux14
NI-Daqmx Base15
Labview15
Labwindows/CVI16
Measurement Studio16
ANSI C Without ni Application Software17
NET Languages Without ni Application Software17
Device Documentation and Specifications18
Training Courses18
Technical Support on the Web18
DAQ System Overview19
DAQ Hardware20
Daq-Stc21
Calibration Circuitry21
Internal or Self-Calibration22
External Calibration22
Signal Conditioning22
Sensors and Transducers22
Signal Conditioning Options23
Scxi23
Scc24
5B Series24
Cables and Accessories24
Using Accessories with Devices25
Custom Cabling27
Programming Devices in Software28
I/O Connector Signal Descriptions29
Terminal Name Equivalents32
+5 V Power Source34
Analog Input35
Analog Input Circuitry35
Mux35
Instrumentation Amplifier (ni36
A/D Converter36
Ai Fifo36
Analog Trigger36
AI Timing Signals36
Input Polarity and Range36
Analog Input Terminal Configuration39
Dither42
Multichannel Scanning Considerations43
Use Low Impedance Sources44
Use Short High-Quality Cabling45
Carefully Choose the Channel Scanning Order45
Avoid Switching from a Large to a Small Input Range45
Insert Grounded Channel between Signal Channels45
Minimize Voltage Step between Adjacent Channels46
Avoid Scanning Faster than Necessary46
Example 146
Example 247
AI Data Acquisition Methods47
Software-Timed Acquisitions47
Hardware-Timed Acquisitions47
Analog Input Triggering48
AI Start Trigger Signal49
Using a Digital Source49
Using an Analog Source49
Outputting the AI Start Trigger Signal50
AI Reference Trigger Signal50
Using a Digital Source52
Using an Analog Source52
Outputting the AI Reference Trigger Signal52
AI Pause Trigger Signal53
Using a Digital Source53
Using an Analog Source53
Connecting Analog Input Signals54
Types of Signal Sources56
Floating Signal Sources56
Ground-Referenced Signal Sources56
Differential Connection Considerations56
Differential Connections for Ground-Referenced Signal Sources57
Common-Mode Signal Rejection Considerations58
Differential Connections for Non-Referenced or Floating Signal Sources58
Single-Ended Connection Considerations60
Common-Mode Signal Rejection Considerations60
Single-Ended Connections for Floating Signal Sources (RSE Configuration)61
Single-Ended Connections for Grounded Signal Sources (NRSE Configuration)61
Field Wiring Considerations62
Configuring AI Modes in Software63
Traditional NI-DAQ (Legacy)63
NI-Daqmx63
Analog Input Timing Signals64
AI Start Trigger Signal66
Using a Digital Source67
Using an Analog Source67
Outputting the AI Start Trigger Signal67
AI Reference Trigger Signal68
Using a Digital Source69
Using an Analog Source70
Outputting the AI Reference Trigger Signal70
AI Pause Trigger Signal70
Using a Digital Source70
Using an Analog Source71
AI Sample Clock Signal71
Using an Internal Source71
Using an External Source71
Outputting the AI Sample Clock Signal72
Other Timing Requirements73
AI Sample Clock Timebase Signal74
AI Convert Clock Signal75
Using an Internal Source75
Using an External Source76
Outputting the AI Convert Clock Signal76
Using a Delay from Sample Clock to Convert Clock77
Other Timing Requirements77
AI Convert Clock Timebase Signal79
Master Timebase Signal79
AI Hold Complete Event Signal80
External Strobe Signal80
Getting Started with AI Applications in Software81
Analog Output82
Analog Output Circuitry82
Dacs82
Dac Fifo82
AO Sample Clock83
Polarity and Reference Selection83
Reference Selection83
Polarity Selection84
Reglitch Selection84
Minimizing Glitches on the Output Signal84
AO Data Generation Methods85
Software-Timed Generations85
Hardware-Timed Generations85
Buffered85
Non-Buffered86
Analog Output Triggering86
AO Start Trigger Signal87
Using a Digital Source87
Using an Analog Source87
Outputting the AO Start Trigger Signal87
AO Pause Trigger Signal88
Using a Digital Source88
Using an Analog Source88
Connecting Analog Output Signals89
Waveform Generation Timing Signals90
AO Start Trigger Signal90
Using a Digital Source90
Using an Analog Source91
Outputting the AO Start Trigger Signal91
AO Pause Trigger Signal91
Using a Digital Source91
Using an Analog Source92
AO Sample Clock Signal92
Using an Internal Source92
Using an External Source92
Outputting the AO Sample Clock Signal93
Other Timing Requirements93
AO Sample Clock Timebase Signal94
Master Timebase Signal95
Getting Started with AO Applications in Software96
Digital I/O98
Extended Digital I/O98
Port 3 Signal Assignments98
Power-On State99
Changing DIO Power-On State to Pulled Low99
Timing Specifications100
Mode 1 Input Timing102
Mode 1 Output Timing103
Mode 2 Bidirectional Timing104
Power-On States of the PFI and DIO Lines105
Connecting Digital I/O Signals105
Getting Started with DIO Applications in Software106
Counters107
Counter Triggering107
Start Trigger107
Pause Trigger108
Counter Timing Signals108
Counter 0 Source Signal109
Counter 0 Gate Signal110
Counter 0 Internal Output Signal111
CTR 0 out Pin112
Counter 0 Up/Down Signal112
Counter 1 Source Signal112
Counter 1 Gate Signal113
Counter 1 Internal Output Signal114
Counter 1 Up/Down Signal115
Frequency Output Signal115
Master Timebase Signal115
Getting Started with Counter Applications in Software116
Programmable Function Interfaces (PFI)117
Inputs117
Outputs117
Digital Routing119
Timing Signal Routing119
Connecting Timing Signals122
Routing Signals in Software123
Real-Time System Integration Bus (RTSI)124
RTSI Triggers124
PCI E Series Devices124
PXI E Series Devices125
Device and RTSI Clocks127
Synchronizing Multiple Devices127
Bus Interface128
MITE and Daqpnp128
Using PXI with Compactpci128
Data Transfer Methods129
Direct Memory Access (DMA)129
Interrupt Request (IRQ)129
Programmed I/O129
Changing Data Transfer Methods between DMA and IRQ130
Triggering131
Triggering with a Digital Source131
Triggering with an Analog Source132
PFI 0/AI START TRIG Pin133
Analog Input Channel133
Analog Trigger Actions133
Analog Trigger Types134
Level Triggering134
Level Triggering with Hysteresis135
Window Triggering135
Analog Trigger Accuracy136
Device-Specific Information137

Brand	National Instruments
Model	PCI-6035E
Category	Computer Hardware
Language	English

National Instruments PCI-6035E User Manual

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