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779039-01 PDF预览

779039-01

更新时间: 2022-09-25 19:37:38
品牌 Logo 应用领域
美国国家仪器公司 - NI /
页数 文件大小 规格书
6页 753K
描述
24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation

779039-01 数据手册

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24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation  
NI 4461, NI 4462  
• 2 or 4 simultaneously sampled  
analog inputs  
Operating Systems  
• Windows 2000/NT/XP  
• 2 simultaneously updated  
analog outputs (NI 4461 only)  
Recommended Software  
• LabVIEW  
• LabVIEW Real-Time Module  
• LabVIEW Sound and  
Vibration Toolkit  
• LabVIEW Order Analysis Toolkit  
• LabWindows/CVI  
• 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  
• Measurement Studio  
• Antialiasing and anti-imaging protection  
• IEPE conditioning – software-configurable  
• Multimodule synchronization  
Measurement Services Software  
(included)  
• NI-DAQmx  
Calibration Certificate Available  
Analog  
Inputs Resolution  
2
4
Input  
Sampling  
Rate  
Input  
Range  
Input  
Configuration  
Analog  
Outputs  
2
0
Output  
Resolution  
24 bits  
Update  
Rate  
204.8 kS/s  
Output  
Range  
Product  
NI 4461  
NI 4462  
Bus  
PXI, PCI  
PXI, PCI  
Triggering  
24 bits  
24 bits  
204.8 kS/s 316 mV to 42.4 V Differential/pseudodifferential  
204.8 kS/s 316 mV to 42.4 V Differential/pseudodifferential  
100 mV to 10 V Analog/digital  
Analog/digital  
Table 1. NI 446x Channel, Speed, and Resolution Specifications  
Overview  
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.  
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  
Figure 1. These 24-bit delta-sigma converters deliver outstanding dynamic range.  

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