Table Of Contents - National Instruments NI 6608 User Manual

Contents
About This Manual
Conventions ...................................................................................................................vii
Related Documentation..................................................................................................viii
Training Courses .............................................................................................viii
Technical Support on the Web ........................................................................ix
Chapter 1
Introduction
About NI 660x Devices..................................................................................................1-1
Using PXI with CompactPCI.........................................................................................1-1
Getting Started ...............................................................................................................1-2
Installing NI-DAQ 7.x .....................................................................................1-2
Installing Other Software ................................................................................1-2
Installing the Hardware ...................................................................................1-2
Accessories and Cables..................................................................................................1-3
Chapter 2
Device Overview
Digital I/O ......................................................................................................................2-1
Prescaling.......................................................................................................................2-1
Pad Synchronization ......................................................................................................2-2
Duplicate Count Prevention...........................................................................................2-4
Example Application That Works Correctly (No Duplicate Counting)..........2-5
Example Application That Works Incorrectly (Duplicate Counting) .............2-6
Example Application That Prevents Duplicate Counting ...............................2-6
Enabling Duplicate Count Prevention in NI-DAQmx.....................................2-7
When to Use Duplicate Count Prevention.......................................................2-7
When Not to Use Duplicate Count Prevention................................................2-7
Transfer Rates ................................................................................................................2-8
High Precision Clock (NI 6608) ....................................................................................2-9
Using the OCXO as the SOURCE Counter ....................................................2-9
Using the OCXO as the 10 MHz PXI Backplane Clock .................................2-9
Measuring OCXO Stable Frequency Deviation ..............................................2-10
Calibration .....................................................................................................................2-12
Register-Level Programming Information.....................................................................2-12
© National Instruments Corporation v NI 660x User Manual