Measurement Computing USB-1208HS-4AO User Manual page 4

Table of Contents
Preface
About this User's Guide ....................................................................................................................... 6
What you will learn from this user's guide ......................................................................................................... 6
Conventions in this user's guide ......................................................................................................................... 6
Where to find more information ......................................................................................................................... 6
Chapter 1
Introducing the USB-1208HS-4AO ...................................................................................................... 7
Software features ................................................................................................................................................ 8
Chapter 2
Installing the USB-1208HS-4AO .......................................................................................................... 9
What comes with your USB-1208HS-4AO shipment? ....................................................................................... 9
Hardware .......................................................................................................................................................................... 9
Additional documentation ................................................................................................................................................. 9
Unpacking the USB-1208HS-4AO ..................................................................................................................... 9
Installing the software ...................................................................................................................................... 10
Installing the hardware ..................................................................................................................................... 10
Connecting the USB-1208HS-4AO to your system .........................................................................................................10
Calibrating the USB-1208HS-4AO .................................................................................................................. 10
Chapter 3
Functional Details ............................................................................................................................... 11
Theory of operation - analog input acquisition modes ..................................................................................... 11
Software paced mode .......................................................................................................................................................11
Continuous scan mode .....................................................................................................................................................11
External components ........................................................................................................................................ 11
USB connector .................................................................................................................................................................12
Activity LED ...................................................................................................................................................................12
Status LED .......................................................................................................................................................................12
Screw terminals................................................................................................................................................................12
Analog input terminals ..................................................................................................................................... 13
Input configuration ..........................................................................................................................................................13
Analog output terminals ................................................................................................................................... 14
External clock I/O terminals ............................................................................................................................. 14
Digital I/O terminals ......................................................................................................................................... 14
Internal pull-up/pull-down capability ..............................................................................................................................15
Counter I/O terminals ....................................................................................................................................... 17
Timer output terminal ....................................................................................................................................... 17
Trigger input terminal ....................................................................................................................................... 17
Retrigger ..........................................................................................................................................................................17
Power terminals ................................................................................................................................................ 18
Analog ground terminals .................................................................................................................................. 18
Common ground terminals ............................................................................................................................... 18
Chapter 4
Specifications ...................................................................................................................................... 19
Analog input ..................................................................................................................................................... 19
Analog output ................................................................................................................................................... 20
External trigger ................................................................................................................................................. 21
External clock input/output............................................................................................................................... 22
4