PXI-5651
矩阵展开式
矩阵模块还可以作为构建块，用于创建远远超出
单个模块的大小。列扩展是在两个或多个
更多矩阵模块，有效地将扩展矩阵中的列数增加一倍。一些NI
矩阵模块提供电缆或接线板解决方案，便于矩阵扩展，如PXIe-2541，
通过简单地连接可购买的附件，使矩阵扩展成为一项简单的任务。
同步和集成
NI交换机使用PXI平台的固有定时和同步功能进行通信
PXI chassis1内的其他仪器。您可以在内存中存储交换机连接列表
在交换机模块上，然后使用集成硬件扫描和触发引擎
推进开关顺序，并与任何能够发送和
接收数字触发器，如数字万用表或示波器。此切换方法删除
软件开销，并减少与传统软件控制交换相关的总线延迟
使用更多可重复的计时加快测试执行的操作。
1.
大多数NI开关都有触发功能。要检查开关模块是否支持此功能，请参考“触发器
产品规范文件的“特性”部分。
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第24页| | PXI开关模块
NI开关软前面板
NI-SWITCH驱动程序软件包括一个交互式软前面板，可实现全面的开箱即用功能。
此交互式软前面板允许您配置交换机拓扑和更改交换机
只需单击即可连接。此外，您可以使用调试驱动程序会话模式来监视和
在自动测量期间调试开关。例如，您可以监视哪些信号路径是
激活，哪个继电器打开/关闭，以及每个继电器使用了多少次。
NI-SWITCH应用程序编程接口（API）
除了软前面板之外，NI-SWITCH驱动程序还包括一个与
多种开发选项，如LabVIEW、C、C#等。驱动程序还提供访问
帮助文件、文档和数十个可作为起点使用的现成装运示例
适用于您的应用程序。

Matrix Expansion Matrix modules can also serve as building blocks for creating larger configurations that are well beyond the size of a single module. Column expansion is the process of connecting each row between two or more matrix modules, effectively doubling the number of columns within the expanded matrix. Some NI matrix modules offer cable or terminal block solutions for easy matrix expansion, such as the PXIe-2541, making matrix expansion a simple task by simply connecting purchasable accessories. Synchronization and Integration NI switches use the inherent timing and synchronization capabilities of the PXI platform to communicate with other instruments within the PXI chassis1. You can store a list of switch connections in memory onboard the switch module and then use the integrated hardware scanning and triggering engine to advance the switch sequence and rapidly communicate with any PXI instrument that can send and receive digital triggers, such as DMM or oscilloscope. This advanced switching method removes the software overhead and reduces the bus latency associated with traditional software-controlled switching operations for faster test execution with more repeatable timing. 1 Triggering is available on most NI switches. To check if this feature is supported by a switch module, reference the “Trigger Characteristics” section of the product specification document. Have a question? Contact Us Page 24 | ni.com | PXI Switch Modules NI-SWITCH Soft Front Panel The NI-SWITCH driver software includes an interactive soft front panel for full out-of-the-box functionality. This interactive soft front panel allows you to configure the switch topology and change switch connections with a simple click. In addition, you can use the Debug Driver Session mode to monitor and debug the switch during automated measurement. For example, you can monitor which signal paths are active, which individual relays are open/closed, and how many times each relay has been used. NI-SWITCH Application Programming Interface (API) In addition to the soft front panel, the NI-SWITCH driver includes a best-in-class API that works with a variety of development options such as LabVIEW, C, C#, and others. The driver also provides access to help files, documentation, and dozens of ready-to-run shipping examples you can use as a starting point for your application.