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24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation Overview The National Instruments 4461 and 4462 are high-accuracy data acquisition devices specifically designed for sound and vibration applications. The devices include the hardware and software needed to make precision measurements with microphones, accelerometers, and other transducers that have very large dynamic ranges. Common applications for the NI 446x include audio test, automotive test, noise, vibration, and harshness (NVH) analysis, and machine condition monitoring (MCM). The NI 446x devices offer a complete range of functionality for sound and vibration monitoring and analysis applications. With either two inputs and two outputs, or four inputs, they are ideal for applications where simultaneous generation and acquisition of noise, vibration, and acoustic signals are required. You can synchronize the acquisition clock of your NI 446x with other instruments in your system for mixed-signal applications. Both analog and digital triggering are available on an NI 446x. Hardware

Applications

  • Audio Test
  • Noise, Vibration, and Harshness Test
  • Machine Condition Monitoring
  • Sound Power
  • Structural Vibration
  • Pass-by Noise Analog Inputs The analog input channels of NI 446x devices have 24-bit resolution ADCs that are simultaneously sampled at software-programmable rates for standard audio applications, such as 44.1 kS/s (the standard rate used in CD players), 48.0 kS/s (the rate used in digital audio tape (DAT) recorders and other digital audio equipment), 96.0 kS/s, and 192 kS/s. An NI 446x is well-suited for audio, sound, and vibration analysis applications. The analog inputs offer programmable AC/DC coupling. A programmable gain amplifier stage on the inputs gives gain selection from -20 to +30 dB in 10 dB steps. Furthermore, to provide you with the quietest and highest-quality analog measurements, the input stage accepts differential or single-ended signal connections.
  • 2 or 4 simultaneously sampled analog inputs
  • 2 simultaneously updated analog outputs (NI 4461 only)
  • 118 dB dynamic range, 24-bit resolution
  • 204.8 kS/s maximum sampling rate
  • 92 kHz alias-free bandwidth
  • Input range from ±316 mV to 42.4 V
  • 6 gain settings
  • AC/DC coupling
  • Antialiasing and anti-imaging protection
  • IEPE conditioning – software-configurable
  • Multimodule synchronization Operating Systems
  • Windows 2000/NT/XP Recommended Software
  • LabVIEW
  • LabVIEW Real-Time Module
  • LabVIEW Sound and Vibration Toolkit
  • LabVIEW Order Analysis Toolkit
  • LabWindows/CVI
  • Measurement Studio Measurement Services Software (included)
  • NI-DAQmx Calibration Certificate Available NI 4461, NI 4462 Product Bus Analog Inputs Input Resolution Sampling Rate Input Range Input Configuration Analog Outputs Output Resolution Update Rate Output Range Triggering NI 4461 PXI, PCI 2 24 bits 204.8 kS/s ±316 mV to 42.4 V Differential/pseudodifferential 2 24 bits 204.8 kS/s ±100 mV to 10 V Analog/digital NI 4462 PXI, PCI 4 24 bits 204.8 kS/s ±316 mV to 42.4 V Differential/pseudodifferential 0 – – – Analog/digital

Table 1. NI 446x Channel, Speed, and Resolution Specifications Figure 1. These 24-bit delta-sigma converters deliver outstanding dynamic range.

of DC to 92 kHz, and have a typical THD of -107 dB. input channels while updating the output channels. generated when an analog signal is produced from digital data. circuitry are low-distortion, low-noise, flat-frequency analog signals. of two or more NI 446x devices with less than 0.1 deg phase mismatch. synchronization of multiple devices in a single task. TTL/CMOS-compatible and is activated by a choice of rising or falling edge. acquisition triggered by the hammer impact. ISO 9002-certified calibration certificates are available on request. Instruments LabVIEW, LabWindows/CVI, or Measurement Studio.

  • Fractional-octave analysis with weighting
  • Integrated vibration level
  • Weighted sound level
  • Zoom power spectrum
  • Peak search
  • Power in band 24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.)

Figure 2. With application software such as NI LabVIEW, you can conduct frequency-response, swept-sine, and other common audio measurements.

  • Power spectrum analysis
  • Frequency response
  • Limit testing In addition, the LabVIEW Sound and Vibration Toolkit includes numerous VIs for audio measurements such as gain, phase, distortion, and swept-sine analysis. Swept-sine is a powerful analysis technique to measure frequency response. The toolkit also includes simple modular examples of all of these measurements, so you can quickly combine analog output, analog input, and data analysis to build a customized application. In addition, the existing signal generation is extended to include the tools and examples needed to provide the excitation required by most audio, noise, and vibration measurements. For example, a library of 33 waveforms is included in this toolkit to get you up and running fast. This toolkit also optimizes LabVIEW to perform noise and vibration measurements. For example, all frequency measurements can perform zoom FFT analysis to offer improved resolution in the frequency range of interest. With the built-in fractional-octave analysis, you can perform measurements with any number of bands at any sampling frequency. NI 446x dynamic signal acquisition devices, combined with this toolkit, offer compliance with several standards for sound level measurements and octave analysis:
  • IEC 61260 : 1995, class 1
  • IEC 61672 : 2002, class 1
  • ANSI S1.11 – 2004, class 1
  • ANSI S1.4 – 1983
  • ANSI S1.42 – 1986 LabVIEW Order Analysis Toolkit Order analysis is a tool for examining dynamic signals generated by mechanical systems that include rotating or reciprocating components. With order analysis you can dissect sound, vibration, and other dynamic signals into components that relate to physical elements of mechanical systems. The LabVIEW Order Analysis Toolkit is ideal for machine monitoring, machine health, and machine efficiency applications. You can use the toolkit to perform the most common analyses required by MCM applications, including order tracking, slow-roll compensation, and vibration integration. With this toolkit, you can develop your application faster by using built-in examples for order spectra, tachometer processing, and waterfall plots. You can also apply order analysis to dynamic signals generated by mechanical systems that include rotating or reciprocating components, such as turbines, compressors, pumps, and engines. It is common to use order analysis in applications such as machine condition monitoring and noise, vibration, and harshness (NVH) testing. With the added capability for online processing, you can easily create flexible applications for condition-based monitoring and predictive maintenance. The National Instruments 446x dynamic signal acquisition devices are ideal for acquiring sound and vibration signals to analyze with this toolkit. 24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.)

Ordering Information

Includes NI-DAQmx driver software. BUY NOW! For complete product specifications, pricing, and accessory information, call (800) 813 3693 (U.S.) or go to ni.com/soundandvibration.

24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.) Specifications Typical for 25 °C unless otherwise noted. Analog Input Number of simultaneously sampled input channels (50 Ω between negative input and chassis ground), each channel independently software-selectable independently software-selectable Sample rates ( fs), increments, maximum Input Signal Ranges Amplifier Characteristics Common-mode rejection ratio up to 105 dB for higher gain Dynamic Characteristics AC coupling 20 Hz to 92.2 kHz -104 dBc up to 92.2 kHz Integrated Electronic Piezoelectric (IEPE) each channel independently software-selectable Channel input impedance pseudodifferential Transducer Electronic Data Sheet (TEDS) Compatibility The PCI-4461, PCI-4462, and PXI-4462 inputs work with transducer electronic data sheet (TEDS) sensors according to the IEEE 1451 Standard. For more information about TEDS, go to ni.com/infoand enter rdteds. Analog Output (NI 4461) Output Characteristics (50 Ω to chassis ground on shield), each channel independently software-selectable Update rates ( increments, maximum Output Signal Range Voltage Output positive and negative Dynamic Characteristics 66 dB min > 768 kHz AO Flatness 102.5 kS/s (30 kHz bandwidth) Internal Frequency Timebase Characteristics temperature range Gain Log (dB) Full-Scale Range (Peak) -20 ±42.4 V -10 ±31.6 V 0 ±10.0 V +10 ±3.16 V +20 ±1.00 V +30 ±0.316 V Input Impedance Differential Configuration Pseudodifferential Configuration Between positive input and chassis ground

1 MΩ || 217 pF 1 MΩ || 217 pF

1 MΩ || 229 pF 50 Ω

Specification Low-Frequency Alias Rejection Disabled Alias-free bandwidth (BW), (passband) DC to 0.4535 fs Alias rejection, minimum 120 dBc Attenuation (dB) Full-Scale Range (Vpk)1 40 ±0.1 20 ±1.0 0 ±10.0 1Each output channel range is independently software-selectable.

24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.) Triggers Analog Trigger (software-selectable) Digital Trigger RTSI bus Certifications and Compliances CE Mark Compliance For a complete listing of all NI 446x specifications, please visit ni.com/soundandvibration.

NI has the services and support to meet your needs around the globe and through the application life cycle – from planning and development through deployment and ongoing maintenance. We offer services and service levels to meet customer requirements in research, design, validation, and manufacturing. Visit ni.com/services. Training and Certification NI training is the fastest, most certain route to productivity with our products. NI training can shorten your learning curve, save development time, and reduce maintenance costs over the application life cycle. We schedule instructor-led courses in cities worldwide, or we can hold a course at your facility. We also offer a professional certification program that identifies individuals who have high levels of skill and knowledge on using NI products. Visit ni.com/training. Professional Services Our Professional Services Team is comprised of NI applications engineers, NI Consulting Services, and a worldwide National Instruments Alliance Partner program of more than 600 independent consultants and integrators. Services range from start-up assistance to turnkey system integration. Visit ni.com/alliance. OEM Support We offer design-in consulting and product integration assistance if you want to use our products for OEM applications. For information about special pricing and services for OEM customers, visit ni.com/oem. Local Sales and Technical Support In offices worldwide, our staff is local to the country, giving you access to engineers who speak your language. NI delivers industry-leading technical support through online knowledge bases, our applications engineers, and access to 14,000 measurement and automation professionals within NI Developer Exchange forums. Find immediate answers to your questions at ni.com/support. We also offer service programs that provide automatic upgrades to your application development environment and higher levels of technical support. Visit ni.com/ssp. Hardware Services NI Factory Installation Services NI Factory Installation Services (FIS) is the fastest and easiest way to use your PXI or PXI/SCXI combination systems right out of the box. Trained NI technicians install the software and hardware and configure the system to your specifications. NI extends the standard warranty by one year on hardware components (controllers, chassis, modules) purchased with FIS. To use FIS, simply configure your system online with ni.com/pxiadvisor. Calibration Services NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. We provide manual calibration procedures, services to recalibrate your products, and automated calibration software specifically designed for use by metrology laboratories. Visit ni.com/calibration. Repair and Extended Warranty NI provides complete repair services for our products. Express repair and advance replacement services are also available. We offer extended warranties to help you meet project life-cycle requirements. Visit ni.com/services. SERVICE NEEDS © 2006 National Instruments Corporation. All rights reserved. CVI, LabVIEW, Measurement Studio, National Instruments, National Instruments Alliance Partner, NI, ni.com, RTSI, and SCXI ar e trademarks of National Instruments. Other product and company names listed are trademarks or trade names of their respective companies. A National Instr uments Alliance Par tner is a business entity independent fr om NI and has no agency , partnership, or joint-venture relationship with NI. National Instruments • info@ni.com ni.com • (800) 813 3693 *351332A-01* 351332A-01 2006-6904-301-101-D