National Instruments PCI-4451, PCI-4452 Chapter 4 Signal Connections

Contents
PCI-4451/4452 User Manual vi
© National Instruments Corporation
Device and RTSI Clocks.................................................................................3-11
Selecting Sample/Update Clock Frequency..................................................................3-12
Device Configuration Issues..........................................................................................3-13
Chapter 4
Signal Connections
I/O Connectors...............................................................................................................4-1
Analog I/O Connector Signal Descriptions.................................................... 4-2
Digital I/O Connector Signal Descriptions.....................................................4-5
Analog Input Signal Connections..................................................................................4-9
Types of Signal Sources................................................................................................4-10
Floating Signal Sources..................................................................................4-10
Ground-Referenced Signal Sources................................................................4-10
Analog Output Signal Connections...............................................................................4-11
Analog Power Connections...........................................................................................4-12
Digital I/O Signal Connections.....................................................................................4-12
Digital Power Connections............................................................................................4-14
Timing Connections......................................................................................................4-14
Programmable Function Input Connections................................................... 4-14
Acquisition Timing Connections....................................................................4-15
PFI0/TRIG1 (EXT_TRIG) Signal....................................................4-16
PFI1/TRIG2 (PRETRIG) Signal...................................................... 4-17
CONVERT* Signal..........................................................................4-17
EXTSTROBE* Signal......................................................................4-18
Waveform Generation Timing Connections...................................................4-18
WFTRIG Signal................................................................................4-18
UPDATE* Signal.............................................................................4-18
General-Purpose Timing Signal Connections.................................................4-19
GPCTR0_SOURCE Signal..............................................................4-19
GPCTR0_GATE Signal................................................................... 4-20
GPCTR0_OUT Signal......................................................................4-20
GPCTR0_UP_DOWN Signal...........................................................4-20
GPCTR1_SOURCE Signal..............................................................4-21
GPCTR1_GATE Signal................................................................... 4-21
GPCTR1_OUT Signal......................................................................4-22
GPCTR1_UP_DOWN Signal...........................................................4-22
FREQ_OUT Signal...........................................................................4-24
Field Wiring Considerations..........................................................................................4-24
User.book Page vi Tuesday, April 14, 1998 10:20 AM