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NI PXIe-6345 - User Manual

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National Instruments PXIe-6349 Manual
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Table of Contents

Questions and Answers

  • A
    Angela ColemanAug 10, 2025
    Why am I seeing crosstalk when sampling multiple NI PXIe-6345 I/O Systems channels?
    • A
      ariveraAug 10, 2025
      Crosstalk or ghost voltages when sampling multiple channels on NI I/O Systems can occur due to charge injection. To resolve this, use a voltage follower with operational amplifiers (op-amps) with unity gain for each high-impedance source before connecting to an X Series device. Alternatively, decrease the sample rate for each channel. If you are sampling among multiple channels at various gains, refer to the Multichannel Scanning Considerations section of Chapter 4, Analog Input.
  • S
    Sherry RossAug 20, 2025
    What to do if NI I/O Systems readings are random in differential analog input ground-reference mode?
    • W
      William AyalaAug 20, 2025
      If you observe random readings with rapid drift in differential analog input ground-reference mode on your NI I/O Systems device, check the ground-reference connections. Also, ensure that the signal is referenced to the same ground level as the device reference.
  • D
    Dean JacksonAug 30, 2025
    How to fix glitches on the output signal of NI PXIe-6345 I/O Systems?
    • M
      Michael HarveyAug 30, 2025
      Glitches on the output signal of NI I/O Systems can occur when a DAC switches from one voltage to another. To mitigate this, build a lowpass deglitching filter to remove some of these glitches.

Summary

Chapter 1 Getting Started

Installation

Provides instructions for installing application software and hardware for DAQ devices.

Chapter 2 DAQ System Overview

DAQ Hardware

Describes the DAQ hardware components and their functions in X Series devices.

Chapter 3 Connector and LED Information

I;O Connector Signal Descriptions

Details the signals and their functions found on the I/O connectors of X Series devices.

Chapter 4 Analog Input

Analog Input on MIO X Series Devices

Covers analog input circuitry and configuration for MIO X Series devices.

Analog Input Data Acquisition Methods

Discusses software-timed and hardware-timed acquisition methods for analog input.

Analog Input Triggering

Explains start, reference, and pause trigger actions for analog input measurements.

Chapter 5 Analog Output

Analog Output Data Generation Methods

Covers software-timed and hardware-timed generation methods for analog output.

Analog Output Triggering

Explains start and pause trigger actions for analog output generation.

Chapter 6 Digital I;O

Digital Input Data Acquisition Methods

Describes software-timed and hardware-timed acquisition methods for digital input.

Digital Input Triggering

Covers start, reference, and pause trigger actions for digital input.

Digital Output Data Generation Methods

Details software-timed and hardware-timed generation methods for digital output.

Digital Output Triggering

Covers start and pause trigger actions for digital output generation.

Chapter 7 Counters

Counter Timing Engine

Explains the counter timing engine and available clock sources for X Series counters.

Counter Input Applications

Lists various applications for counter inputs like edge counting and measurements.

Counter Output Applications

Lists applications for counter outputs like pulse and frequency generation.

Default Counter;Timer Pins

Provides default NI-DAQmx counter/timer pin assignments for X Series devices.

Counter Triggering

Covers arm start, start, and pause trigger actions for counter operations.

Chapter 8 PFI

Chapter 9 Digital Routing and Clock Generation

Clock Routing

Illustrates the clock routing circuitry of an X Series device and its functions.

Synchronizing Multiple Devices

Covers methods for synchronizing multiple X Series devices using PXI Express and PCI Express.

Chapter 10 Bus Interface

Data Transfer Methods

Chapter 11 Triggering

Triggering with a Digital Source

Triggering with an Analog Source

Appendix C Troubleshooting

Analog Input

NI PXIe-6345 Specifications

General IconGeneral
BrandNI
ModelPXIe-6345
CategoryI/O Systems
LanguageEnglish

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