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PXI-4461

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PXI-4461, 2-Input/2-Output Channels, PXI Sound and Vibration DSA Device

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National Instruments PXI-4461 PXI Sound and Vibration Device

The PXI-4461 (Part Number: 779687-01) is intended for sound and vibration applications. This module gives two-channel dynamic signal generation and two-channel acquisition. One of six gain settings can be used to design the input range. The PXI-4461 incorporates programming-configurable AC/DC coupling, IEPE conditioning, and the equipment and programming that are expected to make accuracy estimations with receivers, accelerometers, and different transducers that have large dynamic ranges. Common applications for this module include audio test, automotive noise, vibration, and harshness (NVH), and machine condition monitoring.

The NI PXI-4461 module supports two terminal arrangements for analog input: differential and pseudo-differential. The term "pseudo-differential" alludes to the way that there is 50 Ω of resistance between the external BNC shell and chassis frame. The analog input channels on this module also have digital filters to stop aliasing from occurring. The user can arrange the PXI-4461 input channels on a per-channel basis. Therefore, the user can have one channel configured for differential mode and the other channel configured for pseudo-differential mode. Then, the user can arrange the channels in view of how the signal source or device under test (DUT) is referenced.

The acquisition clock of the NI PXI-4461 PXI Sound and Vibration Module can be synchronized with other devices in the user’s system for mixed-signal applications. Digital and analog triggering are features offered on this module. The analog input channels have 24-bit resolution analog-to-digital converters that are simultaneously sampled at software-programmable rates for regular audio applications. For example, one of these rates is 44.1 kS/s, which is utilized in CD players. Another example is 48.0 kS/s, which is the rate utilized in digital audio tape recorders and other types of professional digital audio devices. Additional datasheets and user manuals for the PXI-4461 can be found under the "Manuals & PDFs" tab.

While the PXI-4461 is now considered obsolete by National Instruments, the PXI Sound and Vibration Module will remain available for either purchase or repairs in perpetuity from Apex Waves.

Model PXI-4461
Manufacturer National Instruments
Part Number 779687-01
HTS Code 8471804000
Type PXI Sound and Vibration Module
Differential Analog Input Channels 2
Analog Output Channels 2
Analog Input Coupling AC/DC
Maximum Sampling Rate 204.8 kS/s
Bus Interface 3.3 V or 5 V Signal Environment
# Gain Settings 6
Highpass Filter Cut-Off Frequency 3.4 Hz
ADC Type Delta-Sigma
ADC Resolution 24 Bits
Analog I/O Connectors BNC Female
Digital Trigger Connector SMB Male
Operating Temp Range 0 to 55 °C 
Storage Temp Range -20 to 70 °C
Dimensions 6.3 x 3.9 in. (16 cm × 10 cm) without Connectors
Weight 8.5 oz. (241 g)
PXI-4461 Manual User Manual and Maintenance Manual Available for Download
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National Instruments PXI-4461 Frequently Asked Questions

 

Question: What is the high pass filter cutoff frequency for the NI PXI-4461?

Answer: The Sound and Vibration Module has a high-pass filter cutoff frequency of 3.4 Hz.

 

Question: How many gain settings does the module have?

Answer: The PXI-4461 has 6 gain settings.

 

Question: What is the driver used by the NI PXI-4461?

Answer: The driver used by the module is the NI-DAQmx driver software version 7.2 or later.

 

Question: How do I install the software for the PXI-4461?

Answer: You must first install an application development environment (ADE) such as LabVIEW, Microsoft Visual Studio, or LabWindows/CVI, and then install the NI-DAQmx driver software.

 

Question: When switching between different gains on the PXI-4461, the first few values aren't valid. Why is this?

Answer: The Sound and Vibration Module's ADC filter delay (ranging from 32.96875 to 63 samples depending on the sample rate) can cause incorrect values. 

 

Question: How long does the device need to warm up to ensure accurate measurements?

Answer: The recommended warm-up time for the device is 15 minutes.

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Common Typos:

PXU-4461, PXK-4461, PXL-4461, PXI-R461, PXI-446W

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