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NI交換機(jī)使用PXI平臺(tái)的固有定時(shí)和同步功能與PXI chassis1內(nèi)的其他儀器進(jìn)行通信。您可以將開(kāi)關(guān)連接列表存儲(chǔ)在開(kāi)關(guān)模塊上的內(nèi)存中，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，并與任何可以發(fā)送和接收數(shù)字觸發(fā)器的PXI儀器（如DMM或示波器）快速通信。這種切換方法消除了軟件開(kāi)銷，并減少了與傳統(tǒng)軟件控制的切換操作相關(guān)的總線延遲，以實(shí)現(xiàn)更快的測(cè)試執(zhí)行和更多的可重復(fù)計(jì)時(shí)。1大多數(shù)NI開(kāi)關(guān)上都有觸發(fā)功能。要檢查開(kāi)關(guān)模塊是否支持此功能，請(qǐng)參考產(chǎn)品規(guī)范文檔的“觸發(fā)器特性”部分。有問(wèn)題嗎？聯(lián)系我們第30頁(yè)| | PXI開(kāi)關(guān)模塊NI-Switch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通過(guò)簡(jiǎn)單的單擊來(lái)配置交換機(jī)拓?fù)浜透慕粨Q機(jī)連接。此外，您可以使用調(diào)試驅(qū)動(dòng)程序會(huì)話模式在自動(dòng)測(cè)量期間監(jiān)視和調(diào)試交換機(jī)。例如，您可以監(jiān)視哪些信號(hào)路徑處于活動(dòng)狀態(tài)，哪些繼電器處于打開(kāi)/關(guān)閉狀態(tài)，以及每個(gè)繼電器的使用次數(shù)。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)的API，可與多種開(kāi)發(fā)選項(xiàng)（如LabVIEW、C、C#等）配合使用。該驅(qū)動(dòng)程序還提供了對(duì)幫助文件、文檔和數(shù)十個(gè)可作為應(yīng)用程序起點(diǎn)的現(xiàn)成裝運(yùn)示例的訪問(wèn)。

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 30 | 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.