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PXI-2501
矩陣展開式
矩陣模塊還可以作為構(gòu)建塊，用于創(chuàng)建遠遠超出
單個模塊的大小。列擴展是在兩個或多個
更多矩陣模塊，有效地將擴展矩陣中的列數(shù)增加一倍。一些NI
矩陣模塊提供電纜或接線板解決方案，便于矩陣擴展，如PXIe-2541，
通過簡單地連接可購買的附件，使矩陣擴展成為一項簡單的任務。
同步和集成
NI交換機使用PXI平臺的固有定時和同步功能進行通信
PXI chassis1內(nèi)的其他儀器。您可以在內(nèi)存中存儲交換機連接列表
在交換機模塊上，然后使用集成硬件掃描和觸發(fā)引擎
推進開關順序，并與任何能夠發(fā)送和
接收數(shù)字觸發(fā)器，如數(shù)字萬用表或示波器。此切換方法刪除
軟件開銷，并減少與傳統(tǒng)軟件控制交換相關的總線延遲
使用更多可重復的計時加快測試執(zhí)行的操作。
1.
大多數(shù)NI開關都有觸發(fā)功能。要檢查開關模塊是否支持此功能，請參考“觸發(fā)器
產(chǎn)品規(guī)范文件的“特性”部分。
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第24頁| | PXI開關模塊
NI開關軟前面板
NI-SWITCH驅(qū)動程序軟件包括一個交互式軟前面板，可實現(xiàn)全面的開箱即用功能。
此交互式軟前面板允許您配置交換機拓撲和更改交換機
只需單擊即可連接。此外，您可以使用調(diào)試驅(qū)動程序會話模式來監(jiān)視和
在自動測量期間調(diào)試開關。例如，您可以監(jiān)視哪些信號路徑是
激活，哪個繼電器打開/關閉，以及每個繼電器使用了多少次。
NI-SWITCH應用程序編程接口（API）
除了軟前面板之外，NI-SWITCH驅(qū)動程序還包括一個與
多種開發(fā)選項，如LabVIEW、C、C#等。驅(qū)動程序還提供訪問
幫助文件、文檔和數(shù)十個可作為起點使用的現(xiàn)成裝運示例
適用于您的應用程序。
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.
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