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PXIe-5451
矩陣展開(kāi)式
矩陣模塊還可以作為構(gòu)建塊，用于創(chuàng)建遠(yuǎn)遠(yuǎn)超出
單個(gè)模塊的大小。列擴(kuò)展是在兩個(gè)或多個(gè)
更多矩陣模塊，有效地將擴(kuò)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(kuò)展，如PXIe-2541，
通過(guò)簡(jiǎn)單地連接可購(gòu)買的附件，使矩陣擴(kuò)展成為一項(xiàng)簡(jiǎn)單的任務(wù)。
同步和集成
NI交換機(jī)使用PXI平臺(tái)的固有定時(shí)和同步功能進(jìn)行通信
PXI chassis1內(nèi)的其他儀器。您可以在內(nèi)存中存儲(chǔ)交換機(jī)連接列表
在交換機(jī)模塊上，然后使用集成硬件掃描和觸發(fā)引擎
推進(jìn)開(kāi)關(guān)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(wàn)用表或示波器。此切換方法刪除
軟件開(kāi)銷，并減少與傳統(tǒng)軟件控制交換相關(guān)的總線延遲
使用更多可重復(fù)的計(jì)時(shí)加快測(cè)試執(zhí)行的操作。
1.
大多數(shù)NI開(kāi)關(guān)都有觸發(fā)功能。要檢查開(kāi)關(guān)模塊是否支持此功能，請(qǐng)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(yè)| | PXI開(kāi)關(guān)模塊
NI開(kāi)關(guān)軟前面板
NI-SWITCH驅(qū)動(dòng)程序軟件包括一個(gè)交互式軟前面板，可實(shí)現(xiàn)全面的開(kāi)箱即用功能。
此交互式軟前面板允許您配置交換機(jī)拓?fù)浜透慕粨Q機(jī)
只需單擊即可連接。此外，您可以使用調(diào)試驅(qū)動(dòng)程序會(huì)話模式來(lái)監(jiān)視和
在自動(dòng)測(cè)量期間調(diào)試開(kāi)關(guān)。例如，您可以監(jiān)視哪些信號(hào)路徑是
激活，哪個(gè)繼電器打開(kāi)/關(guān)閉，以及每個(gè)繼電器使用了多少次。
NI-SWITCH應(yīng)用程序編程接口（API）
除了軟前面板之外，NI-SWITCH驅(qū)動(dòng)程序還包括一個(gè)與
多種開(kāi)發(fā)選項(xiàng)，如LabVIEW、C、C#等。驅(qū)動(dòng)程序還提供訪問(wèn)
幫助文件、文檔和數(shù)十個(gè)可作為起點(diǎn)使用的現(xiàn)成裝運(yùn)示例
適用于您的應(yīng)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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