PXIe-4464动态信号分析仪提供了集成的信号调理和数据采集来实现音频、声音和振动测量。
它以模块化形式提供了最严格音频测量所需的高精确度和动态范围，所以它可以进行扩展来满足最大麦克风阵列测量的需求。
PXIe-4464包含4个24位模数转换器，以允许以高达204.8
kS/s的速率进行全差分同步采集，同时也提供了集成电子压电(IEPE)励磁电路来为麦克风、加速计以及其它IEPE传感器供电。
IEPE励磁电路可为高功率传感器提供高达20
mA的电流，即使经过最长的传感器线缆，也可提供强大的数据完整性。
您可使用NI-DAQmx驱动软件来轻松快捷地编程PXIe-4464。
驱动程序调用可允许每个通道单独选择电压范围、IEPE励磁电流和AC/DC耦合。 两个定时引擎可实现在单个模块上执行多采样速率应用以及独立地启动和停止不同通道。
PXIe-4464有两种连接器类型。 BNC连接器选项为IEPE传感器提供了行业标准的BNC连接器，非常适合普通麦克风和加速计测量。
mXLR连接器提供了更好的噪声抑制能力，适用于测量电压或连线至具有差分输出的非IEPE传感器。
mXLR连接器推荐用于音频测试应用，因为对于这些应用，线缆本身产生的噪声也是一个问题。
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Product Family | 动态信号分析仪
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Measurement Type | 加速计
电压
麦克风
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Form Factor | PCI / PCI Express
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PXI Bus Type | PXI Express
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Operating System / Target | Windows
|
RoHS Compliant | 是
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差分通道 | 4
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模拟输入分辨率 | 24 bits
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最大电压范围 | -42.4 V - 42.4 V
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最小电压范围 | -316 mV - 316 mV
|
量程数量 | 6
|
同步采样 A property of a measurement system in which each input or output channel is
digitized or updated at the same instant. You will need simultaneous sampling
for applications where the time relationship between inputs is important, such
as phase analysis of AC signals. Because channel-dedicated analog-to-digital converters (ADCs) are used to
sample data simultaneously between inputs, the maximum sample rate is applicable
to each channel and is not divided by the total number of channels. Devices that
don’t have simultaneous sampling capabilities use multiplexing to connect each
channel to its ADC. Interval scanning is a low-cost option to simulate simultaneous
sampling for low-frequency signals such as temperature or pressure. This method
scans the input channels at one interval and uses a second interval to determine
the time before repeating the scan. The input channels are scanned within
microseconds, creating the effect of simultaneously sampling the input
channels. | Yes
|
板载内存 | 1023 样本
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激励电流 | 20 mA
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总谐波失真(THD) | 109 dBc
|
动态范围 The ratio of the highest signal level a circuit can handle to the smallest
signal level it can handle (usually equal to the noise level), normally
expressed in dB. | 119 dBFS
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信号调理 | 抗混叠滤波器
电流激励
|
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Number of Channels | 0
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Counters | 0
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Timing / Triggering / Synchronization |
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Triggering | 数字
模拟
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Synchronization Bus(RTSI) | Yes |