Contents
PCI-1200 User Manual vi © National Instruments Corporation
Types of Signal Sources...................................................................3-7
Floating Signal Sources......................................................3-7
Ground-Referenced Signal Sources...................................3-7
Input Configurations.........................................................................3-7
Differential Connection Considerations
(DIFF Configuration)......................................................3-9
Differential Connections for Grounded Signal Sources.....3-10
Differential Connections for Floating Signal Sources....... 3-11
Single-Ended Connection Considerations..........................3-12
Single-Ended Connections for Floating Signal Sources
(RSEConfiguration)........................................................ 3-13
Single-Ended Connections for Grounded Signal Sources
(NRSE Configuration).....................................................3-13
Common-Mode Signal Rejection Considerations..............3-14
Analog Output Signal Connections.................................................................3-15
Digital I/O Signal Connections.......................................................................3-16
Logical Inputs and Outputs...............................................................3-17
Port C Pin Connections.....................................................................3-18
Power Connections.........................................................................................3-18
DAQ and General Purpose Timing Signal Connections.................................3-18
DAQ Timing Connections................................................................3-19
General Purpose Timing Signal Connections...................................3-23
Timing Specifications.......................................................................3-27
Mode 1 Input Timing........................................................................3-28
Mode 1 Output Timing.....................................................................3-29
Mode 2 Bidirectional Timing...........................................................3-30
Chapter 4Theory of Operation
Functional Overview.....................................................................................................4-1
PCI Interface Circuitry..................................................................................................4-2
Timing...........................................................................................................................4-3
Analog Input..................................................................................................................4-5
Analog Input Circuitry....................................................................................4-6
DAQ Operations.............................................................................................4-7
Controlled Acquisition Mode...........................................................4-8
Freerun Acquisition Mode................................................................4-8
Interval Scanning Acquisition Mode................................................4-8
Single-Channel Data Acquisition.....................................................4-9
Multichannel Scanned Data Acquisition..........................................4-9
DAQ Rates......................................................................................................4-10
Analog Output...............................................................................................................4-11