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National Instruments NI USB-621x User Manual

Also see for Data Acquisition Device NI USB-621x: User manual

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Contents
  1. Table Of Contents
  2. important information
  3. Table Of Contents
  4. Table Of Contents
  5. Table Of Contents
  6. Table Of Contents
  7. Table Of Contents
  8. Table Of Contents
  9. Table Of Contents
  10. Table Of Contents
  11. about this manual
  12. related documentation
  13. device documentation and specifications
  14. getting started
  15. Installing NI-DAQmx
  16. Installing the Hardware
  17. DAQ Hardware
  18. DAQ-STC2
  19. Signal Conditioning
  20. Programming Devices in Software
  21. I/O Connector Signal Descriptions
  22. Analog Input Circuitry
  23. Analog Input Range
  24. Analog Input Ground-Reference Settings
  25. USB-6210
  26. Figure
  27. Multichannel Scanning Considerations
  28. Carefully Choose the Channel Scanning Order
  29. Minimize Voltage Step between Adjacent Channels
  30. Example 2
  31. USB 6218
  32. Field Wiring Considerations
  33. MHz Timebase
  34. AI Sample Clock Signal
  35. Using an Internal Source
  36. AI Sample Clock Timebase Signal
  37. Using an External Source
  38. Other Timing Requirements
  39. AI Convert Clock Timebase Signal
  40. AI Hold Complete Event Signal
  41. AI Reference Trigger Signal
  42. Using a Digital Source
  43. Getting Started with AI Applications in Software
  44. Connecting Floating Signal Sources
  45. When to Use Non-Referenced Single-Ended (NRSE) Connections with Floating Signal Sources
  46. Using Differential Connections for Floating Signal Sources
  47. Using Non-Referenced Single-Ended (NRSE) Connections for Floating Signal Sources
  48. Using Referenced Single-Ended (RSE) Connections for Floating Signal Sources
  49. When to Use Differential Connections with Ground-Referenced Signal Sources
  50. When to Use Referenced Single-Ended (RSE) Connections with Ground-Referenced Signal Sources
  51. Using Differential Connections for Ground-Referenced Signal Sources
  52. Using Non-Referenced Single-Ended (NRSE) Connections for Ground-Referenced Signal Sources
  53. Differential Measurements
  54. Referenced Single-Ended (RSE) Measurements
  55. Non-Referenced Single-Ended (NRSE) Measurements
  56. Analog Output Circuitry
  57. AO Range
  58. Analog Output Digital Triggering
  59. Analog Output Timing Signals
  60. AO Pause Trigger Signal
  61. AO Sample Clock Signal
  62. AO Sample Clock Timebase Signal
  63. Getting Started with AO Applications in Software
  64. Static DIO
  65. Connecting Digital I/O Signals
  66. Getting Started with DIO Applications in Software
  67. Counter Input Applications
  68. controlling the direction of counting
  69. Pulse-Width Measurement
  70. Period Measurement
  71. Single Period Measurement
  72. Semi-Period Measurement
  73. Frequency Measurement
  74. Method 2—Measure High Frequency with Two Counters
  75. Method 3—Measure Large Range of Frequencies Using Two Counters
  76. Choosing a Method for Measuring Frequency
  77. Position Measurement
  78. Measurements Using Two Pulse Encoders
  79. Two-Signal Edge-Separation Measurement
  80. Buffered Two-Signal Edge-Separation Measurement
  81. Simple Pulse Generation
  82. Retriggerable Single Pulse Generation
  83. Pulse Train Generation
  84. Frequency Generation
  85. Frequency Division
  86. Counter Timing Signals
  87. Counter n Source Signal
  88. Counter n Gate Signal
  89. Counter n A, Counter n B, and Counter n Z Signals
  90. Counter n Internal Output and Counter n TC Signals
  91. Counter Triggering
  92. Other Counter Features
  93. Cascading Counters
  94. Prescaling
  95. Duplicate Count Prevention
  96. example application that prevents duplicate count
  97. Using PFI Terminals as Timing Input Signals
  98. Exporting Timing Output Signals Using PFI Terminals
  99. PFI Filters
  100. I/O Protection
  101. Digital Isolation
  102. Creating an AC Return Path
  103. khz timebase
  104. USB Signal Streams
  105. Programmed I/O
  106. Triggering with a Digital Source
  107. USB-6210 Pinout
  108. USB-6211/6215 Pinout
  109. USB 6218 Pinout
  110. analog input
  111. analog output
National Instruments NI USB-621x User Manual Manual pdf 130 page image
Chapter 12 Digital Routing and Clock GenerationNI USB-621x User Manual 12-2 ni.com100 kHz TimebaseThe 100 kHz Timebase can be used to generate many of the AI and AOtiming signals. The 100 kHz Timebase also can be used as the Source inputto the 32-bit general-purpose counter/timers.The 100 kHz Timebase is generated by dividing down the 20 MHzTimebase by 200.
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This manual is suitable for:
Data Acquisition Device NI USB-621xNI USB-621 Series
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