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July 2025
779688-01
779688-01, 4 Channel, 24 Bit, Simultaneous Sampling, PXI-4462 Sound and Vibration Module
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments 779688-01 PXI Sound and Vibration Module
The National Instruments 779688-01 belongs to the PXI-4462 Model series, which is designed primarily for high-accuracy sound and vibration applications. With the four channels of dynamic signal acquisition this module offers, accurate frequency-domain measurements are made possible. It has software-configurable AC/DC coupling, IEPE conditioning, and six gain options for adjusting the input range. Because of this, it can be used with large dynamic range transducers, such as accelerometers and microphones. Audio testing, machine condition monitoring (MCM), and vehicle noise, vibration, and harshness (NVH) analysis are examples of common applications.
With 24-bit resolution ADCs, the 779688-01 lets you perform simultaneous sampling at programmable rates of up to 204.8 kS/s. These programmable rates (44.1 kS/s, 48.0 kS/s, 96.0 kS/s, and 192 kS/s) are useful for standard audio applications like CD players and digital audio equipment. To ensure the best possible analog readings, the analog inputs also have programmable AC/DC coupling and a gain amplifier stage with options from -20 to +30 dB in 10 dB steps. The module achieves a dynamic range of 118 dB with little noise and distortion, supporting both single-ended and differential signal connections. With an amplitude flatness of ±0.1 dB and an average THD of -107 dB, the frequency range covers DC to 92 kHz.
The 779688-01 includes two channels of 24-bit-resolution analog output. These outputs are necessary for stimulating systems under test while measuring frequency response with the analog inputs. Exceptional spectral purity is achieved by employing 64-times oversampling delta-sigma modulators and 8-times oversampling interpolators to achieve output conversion rates of up to 204.8 kS/s. A THD of -95 dB at 1 kHz and an amplitude flatness of ±0.1 dB are displayed via the analog output channels, which can be adjusted for attenuation of 0, 20, or 40 dB. Unwanted out-of-band components produced during the digital-to-analog conversion process are removed by the output channels' analog and digital anti-imaging filters.
If more channels are needed for an application, sharing a digital trigger and clock allows multiple NI 446x devices to be synced with less than 0.1-degree phase difference. The synchronization process is made easier by the NI-DAQmx driver software.
| Model | 779688-01 |
|---|---|
| Model Name | PXI‑4462 |
| Part Type | Sound and Vibration Module |
| Input Channels | 4 |
| Sampling Rate | Up to 204.8 kS/s |
| ADC Resolution | 24-bit |
| Dynamic Range | 118 dB |
| Frequency Range | DC to 92 kHz |
| Gain Settings | -20 to +30 dB in 10 dB steps |
| Output Channels | 2 (24-bit resolution) |
| Manufacturer | National Instruments |
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