User manual

Contents
© National Instruments Corporation vii NI-DAQ User Manual for PC Compatibles
Digital I/O Application Tips............................................................................3-62
Handshaking Versus No-Handshaking Digital I/O...........................3-63
Digital Port I/O Applications ............................................................3-63
Digital Line I/O Applications..........................................................................3-65
Digital Group I/O Applications.......................................................................3-67
Digital Group Block I/O Applications ............................................................3-69
Digital Double-Buffered Group Block I/O Applications ................................3-71
Pattern Generation I/O with the DIO-32F, 653X,
PCI-6115, and PCI-6120 Devices ................................................................3-74
Double-Buffered I/O .......................................................................................3-75
Counter/Timer Function Group .....................................................................................3-76
Counter/Timer Functions.................................................................................3-77
Counter/Timer Operation for the CTR Functions.............................3-78
Programmable Frequency Output Operation ....................................3-81
Counter/Timer Application Tips.......................................................3-82
Interval Counter/Timer Functions ...................................................................3-91
Interval Counter/Timer Operation for the ICTR Functions..............3-92
Interval Counter/Timer Application Tips .........................................3-92
General-Purpose Counter/Timer Functions.....................................................3-93
General-Purpose Counter/Timer Application Tips ...........................3-94
Clocks or Time Counters.................................................................................3-95
Clock Resolution...............................................................................3-95
Clock Synchronization......................................................................3-96
Clock Accuracy.................................................................................3-98
Example Clock in a Measurement System .......................................3-98
Sample Use Cases .............................................................................3-99
RTSI Bus Trigger Functions ...........................................................................3-102
RTSI Bus .........................................................................................................3-102
E Series, DSA, 660X, and 671X RTSI Connections........................................3-103
AT-AO-6/10 RTSI Connections......................................................................3-104
DIO-32F RTSI Connections............................................................................3-104
653X RTSI Connections ..................................................................................3-105
RTSI Bus Application Tips .............................................................................3-106
SCXI Functions..............................................................................................................3-107
SCXI Application Tips....................................................................................3-112
Building Analog Input Applications in Multiplexed Mode ..............3-113
Building Analog Input Applications in Parallel Mode .....................3-120
SCXI Data Acquisition Rates ...........................................................3-124
Analog Output Applications............................................................................3-126
Digital Applications.........................................................................................3-127