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应用笔记 | Spectrum

下方的应用文档中的例子将提供给您对不同测量设置更详细的认识。

模块化数字化仪的探头和传感器应用

探头能够转换信号电平、改变阻抗水平,或提供简便的连接方式。传感器可以将物理现象转换为电子信号。这些包括诸如电流探头、加速度计和光电倍增管。德国Spectrum公司的数字化仪可以支持以上两种输入设备.   了解更多

数字化仪作为示波器之使用

一个数字化仪若搭配上适当的软件,便可如示波器般运作。它可取得电压波形,并显示于屏幕上。其中,数字化仪与示波器最大的差别在于,示波器是一台拥有专属显示器的独立仪器;而数子化仪则是一个系统组件,在取得并储存电压波形后,需通过辅助软件方能将数据显示于屏幕上.   了解更多

Spectrum数字化仪之超音波应用

新技术的出现与仪器性能的进步不断促使仪器应用获得更广泛地发展,超音波相关的产品也日益增加。Spectrum数字化仪为超音波检测的理想工具,并在相关产品的发展、测量和操作上均扮演了相当重要的角色。Spectrum数字化仪及任意波形发生器(AWG)提供多种带宽、采样速率及动态范围,以满足超音波测量之广谱需求.   了解更多

模块化数字化仪之射频(RF)测试应用

在任一给定的带宽下,现今的模块化数字化仪 (如Spectrum M4i系列PCIe总线数字化仪) 将可提供比以往更宽的带宽及更高的分辨率。虽然它们被归类于一般用途的测量仪器,却也可使用于射频(RF)及较低频微波之检测上。本篇文章将着重在数字化仪于常见射频(RF)检测之运用实例上。   了解更多

数字化仪之信号处理

模块化数字化仪可提供精确且高分辨率的数据采集,且这些数据可快速被传送至主机。而数字化仪或主计算机上的信号处理功能,则有效强化了这些从简易检测中取得的数据或其他实用信息。   了解更多

数字化仪之机械测量应用

为将力学参数如力、加速度、压力、旋转速度及其他类似参数转化为可测量之电器信号,数字化仪在机械设备及系统的检测上,需要搭配各种传感器或传感器的使用。本篇文章为模块化数字化仪运用于此类测量上的入门指南,。  了解更多

模块化数字化仪之功率测量应用

评估设备或电路的表现时,时常需要用到线性功率测量,而此类测量可通过模块化数字化仪完成。数字化仪不仅为电压响应的测量仪器,同时也可利用合适的电流探头或电流分流器来测量电流。   了解更多

解决数字化仪之数据传送瓶颈

现今多数以计算机为基础的数字化仪和及数据采集系统皆会遇到一个常见问题,而这个问题主要导因于模数转换器(ADC)技术的发展通常领先于总线(PC Bus)的技术发展。这对高速且高分辨率的数字化仪产品,会造成模数转换器(ADC)可数字化的数据量远多过于它可传送至计算机的数据量,这成为了一大瓶颈。   了解更多

激励-反馈模型测试的数字化仪及任意波形发生器(AWG)组合

测量仪器(如数字化仪、示波器及频谱分析仪等)常被独自用来检测自激式电子设备如电源供应器、震荡器、发射器及信号发生器。而外激式电子设备如放大器、过滤器、接收器及数字接口则需要利用测量仪器,同时搭配信号源,以完成检测。模块化任意波形发生器(AWG)与模块化数字化仪皆具有可设置带宽、采样速率及内存的多种来源及测量通道。  了解更多

Boxcar averaging function enhances high-resolution Digitizers

Analog Boxcar Averaging (sometimes referred to as Gated Integration) is a technique that has been used by engineers and scientists for more than 50 years to reduce unwanted noise on signals. In more recent times, with the development of fast high-resolution digitizer technology, digital Boxcar Averaging has been used to achieve the same type of results.   Boxcar Average Functions

Mass Spectrometry and the Modern Digitizer

The scientific field of Mass Spectrometry (MS) has been under constant research and development for over a hundred years, ever since scientists discovered that charged particles could be separated via electromagnetic fields based on their charge-to-mass ratio (Q/m). While spectrometry systems now come in numerous configurations their performance largely depends on a few fundamental elements. In the modern Mass Spectrometer this is normally the ion source (for exciting ions from the material under analysis), the mass analyzer, the particle detector and its associated electronics. Figure 1 shows a simplified block diagram of these principle parts.   Read More

LIDAR - Light Detection and Ranging

The development of laser technology over 50 years ago led to the creation of light detection and ranging (LIDAR) systems that delivered a breakthrough in the way distances are calculated. The principles of LIDAR are much the same as those used by radar. The key difference is that radar systems detect radio waves that are reflected by objects while LIDAR uses laser signals. Both techniques usually employ the same type of time of flight method to determine an object’s distance. However, as the wavelength of laser light is much shorter than that of radio waves, LIDAR systems deliver superior measurement accuracy.   Read More

Vehicular Testing with Modular Digitizers

Modular instruments reduce the size of traditional instruments so that they fit on a circuit card. Multiple cards can be inserted into a frame with a common computer interface, power, and interconnections. Modular instrument frames include computers, using the standard PCIe interface, PXI test frames, or LXI based boxes. Generally, multiple cards are used and configured by the engineer into a test system. The system may contain multiple instruments, single instrument types with multiple channels, or a combination of both.   Read More

Testing Power Supplies

The use of lower voltage rails in current integrated circuits requires power supply designs with tighter dynamic specifications for those supplies. In addition, multi-rail power supplies require test instruments that can analyze multiple channels simultaneously. They must also provide very high dynamic range (up to 16 bits) and acquire very long records with high time resolution. Modular digitizers fill this need offering 16 bit digitizers with up to 256 channels and record lengths to 512 Mega Samples.   Read More