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Chapter 2
DAQ System Overview
Analog Input
Analog Output
Counters
PFI/Static DI
PFI/Static DO
DAQ-STC2
The DAQ-STC2 implements a high-performance digital engine for
NI 6238/6239 data acquisition hardware. Some key features of this engine
include the following:
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NI 6238/6239 User Manual
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A
Isolation
Barrier
AI GND
A
A
and Clock
AO GND
Generation
Digital
Isolators
P0
P0.GND
P1
P1.GND
Figure 2-2. General NI 6238/6239 Block Diagram
Flexible AI and AO sample and convert timing
Many triggering modes
Independent AI and AO FIFOs
Generation and routing of RTSI signals for multi-device
synchronization
Generation and routing of internal and external timing signals
Two flexible 32-bit counter/timer modules with hardware gating
Static DIO signals
PLL for clock synchronization
PCI/PXI interface
Independent scatter-gather DMA controllers for all acquisition and
generation functions
2-2
Digital
Routing
Bus
Bus
Interface
RTSI
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