SCXI-1141 低通滤波器输入模块 可用于低通滤波和抗混叠应用

【产品详情】

National Instruments SCXI-1141 低通滤波器输入模块

SCXI-1141（部件号：776572-41）具有8个低通椭圆滤波器和8个差分输入放大器。该低通滤波器输入模块可用于低通滤波和抗混叠应用，以及通用信号放大和滤波。该模块也建议用于急剧的过滤器滚降。所有八个通道必须设置为相同的截止频率，但用户可以通过编程方式绕过每个通道的低通滤波器。该器件的采样率高达 333 kS/s，衰减率为 135 dB/倍频程。NI SCXI-1141 可 与 NI E/ M 系列 DAQ 仪器 配合 使用 。一台DAQ仪器可用于控制机箱中与其他SCXI模块组合的几个SCXI-1141模块。

SCXI-1304 和 SCXI-1305 屏蔽接线端子具有螺丝端子，可轻松将信号连接到 SCXI-1141 模块。 SCXI-1304 和 SCXI-1305 是建议与此模块一起使用的接线端子。 这些接线端子具有交流或直流耦合以及浮动或接地参考信号所需的所有电路。

借助 NI SCXI-1141 低通 滤波 输入 模 块， 可以 利用 模拟 滤波 器 和 开关 电容 滤波 器， 实现 10,000 个 分立 软件 可 编 程 截止 频率， 同时 保持 常规 持续 时间 有效 滤波 的 低 噪声 性能。该模块还具有外部时钟输入和输出，允许用户在跟踪滤波器应用中使用外部时钟设置滤波器截止频率。

将自动归零模式指定为 1 将有助于提高测量的精确度。当自动归零被激活时，SCXI-1141模块的输入在内部接地。驱动程序在任务开始时完成测量，然后从所有即将到来的测量中减去测量的偏移量。

SCXI-1141使用NI-DAQmx驱动程序软件运行，该软件与软件包或应用开发环境（ADE）兼容，如LabVIEW或LabWindows/CVI。它可以使用Measurement & Automation Explorer （MAX）工具进行配置。NI 设备 的 尺寸 为 1.2 x 6.8 x 8.0 英寸。在物理维度上。

SCXI-1141 低通滤波器输入模块 可用于低通滤波和抗混叠应用

【英文介绍】

National Instruments SCXI-1141 low-pass filter input module

The SCXI-1141 (Part number: 776572-41) has eight low-pass elliptic filters and eight differential input amplifiers. The low-pass filter input module can be used for low-pass filtering and anti-aliasing applications, as well as general-purpose signal amplification and filtering. The module is also recommended for sharp filter roll-downs. All eight channels must be set to the same cutoff frequency, but users can programmatically bypass the low-pass filter for each channel. The device has a sampling rate of up to 333 kS/s and a attenuation rate of 135 dB/ octave. The NI SCXI-1141 can be used with the NI E/ M series DAQ instruments. A single DAQ instrument can be used to control several SCXI-1141 modules in the chassis combined with other SCXI modules.

The SCXI-1304 and SCXI-1305 shielded terminals have screw terminals for easy signal connection to the SCXI-1141 module. SCXI-1304 and SCXI-1305 are the terminals recommended for use with this module. These terminals have all the circuits required for AC or DC coupling and floating or ground reference signals.

With the NI SCXI-1141 low-pass filter input module, 10,000 discrete software programmable cutoff frequencies can be achieved using analog filters and switched capacitor filters while maintaining the low noise performance of conventional duration effective filtering. The module also has an external clock input and output, allowing users to set the filter cutoff frequency using an external clock in tracking filter applications.

Specifying the autozero mode to 1 will help improve the accuracy of the measurement. When automatic zeroing is activated, the input of the SCXI-1141 module is internally grounded. The driver completes the measurement at the beginning of the task and then subtracts the offset of the measurement from all upcoming measurements.

The SCXI-1141 runs using NI-DAQmx driver software that is compatible with a software package or application development environment (ADE) such as LabVIEW or LabWindows/CVI. It can be configured using the Measurement & Automation Explorer (MAX) tool. NI devices measure 1.2 x 6.8 x 8.0 inches. In the physical dimension.

SCXI-1141 低通滤波器输入模块 可用于低通滤波和抗混叠应用

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