NIPCI-4474 NI [National Instruments Corporation], NIPCI-4474 Datasheet - Page 2

• Manufacturer Part Number: NIPCI-4474
• Description: 24-Bit, 102.4 kS/s, 8 and 4-Channel Dynamic Signal Acquisition
• Manufacturer: NI [National Instruments Corporation]

2
24-Bit, 102.4 kS/s, 8 and 4-Channel
Dynamic Signal Acquisition
Figure 2. In an 18-slot PXI chassis with 14 PXI-4472 modules, you can have up to
112 simultaneously sampled analog inputs.
antialiasing filters automatically adjust their cutoff frequency to
remove any frequency components above half the programmed
sampling rate. This advanced analog input design frees you from
adding additional external filters to prevent aliasing.
Multidevice Synchronization
For applications requiring high channel counts, you can synchronize
the operation of two or more NI 447x devices. Using the PXI star
trigger bus, you can send and receive timing signals between
PXI-447x modules. Synchronization is achieved by sharing a digital
trigger from one device and synchronizing all devices to the same
clock. The PXI star trigger bus, as defined by the PXI Specification,
ensures synchronization between modules with less than 1 ns of
skew, which enables a system to have 0.1 deg phase mismatch for a
1 kHz signal between any two channels across devices in the same
chassis. Low phase mismatch is critical in obtaining phase
information
applications. In the 18-slot PXI-1045 chassis, you can synchronize up
to 14 PXI-4472 modules to have up to 112 simultaneously sampled
analog inputs. Using the RTSI bus, two or more PCI-4472 or PCI-4474
boards can be synchronized as well.
Triggering
NI 447x devices have two trigger modes for acquiring signals.
Pretrigger mode digitizes signals before and after a trigger condition
occurs. Posttrigger mode digitizes signals after a trigger condition
occurs. The source of the trigger can come from any analog input
channel, the external digital trigger input, the PXI trigger bus or
RTSI bus, or through software. The external digital trigger is 5 V
TTL/CMOS-compatible and is activated by a choice of rising or falling
edge. Triggering is needed in applications such as those that acquire
transient signals. For example, when measuring transient vibrations
resulting from striking a mechanical structure with a hammer,
acquisition of accelerometer signals is triggered by hammer impact.
Calibration
The offset voltage and gain accuracy of the analog input are
calibrated by National Instruments. An onboard precision voltage
National Instruments • Tel: [phone] • Fax: [phone] • [e-mail] • ni.com
from
cross-channel
measurements
in
many
reference is used for internal calibration to ensure stable, accurate DC
specifications. NIST-traceable and ISO-9002-certified calibration
certificates are available online.
PXI/PCI Interface
NI 447x devices use the PCI mini-MITE to deliver full DMA bus-
master data transfer rates of 20 to 30 MB/s and burst rates up to
132 MB/s. A 1,024-sample, analog input FIFO prevents data loss if
DMA or interrupt service latency is long.
Measurement Services Software
NI 447x devices use NI-DAQmx as the hardware and operating
system interface. You can build automated test systems or integrate
an NI 447x with other hardware, including multifunction DAQ
products, through NI-DAQ function calls for LabVIEW,
LabWindows/CVI, and Measurement Studio.
applications in audio and vibration analysis. These applications are
specifically addressed in the Sound and Vibration Toolkit and the
Order Analysis Toolkit for LabVIEW. Using these toolkits in
conjunction with NI 447x devices, you can produce power spectra,
frequency responses, fractional-octave analysis, sound-level
measurements, order spectra, order maps, and order extraction.
A typical setup for an environmental noise and vibration
measurement application would use one or more PXI-4472 modules,
a PXI chassis and controller, LabVIEW, and the Sound and
Vibration Toolkit.
Ordering Information
NI PCI-4472 ..................................................................778348-01
NI PCI-4472 with Sound and Vibration Toolkit ........778663-01
NI PCI-4474 ..................................................................778729-01
NI PCI-4474 with Sound and Vibration Toolkit ........778778-01
NI PXI-4472 ..................................................................778279-01
NI PXI-4472 with Sound and Vibration Toolkit ........778664-01
NI PXI-4472B ................................................................778279-02
NI PXI-4472B with Sound and Vibration Toolkit ......778664-02
Includes NI-DAQ software.
Accessories
SMB100, SMB female to BNC female
SMB110, SMB female to BNC male
BUY ONLINE!
For complete product specifications, pricing, and accessory
information, call [phone] (U.S. only) or go to
ni.com/modularinstruments
Because of bandwidth, NI 447x devices are well suited for
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