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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
(RSE Configuration)........................................................ 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 4
Theory 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