From 11:00 PM CDT Friday, Nov 8 - 2:30 PM CDT Saturday, Nov 9, ni.com will undergo system upgrades that may result in temporary service interruption.
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From 11:00 PM CDT Friday, Nov 8 - 2:30 PM CDT Saturday, Nov 9, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
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前置放大器通常用來處理非常微弱的訊號。大功率訊號會被電路本身造成失真。前置放大器跟功率放大器不同。前置放大器在高功率訊號時會失真而且通常只有幾十dBm的輸出功率,因為他們是用來設計將訊號灌給 RF 量測設備的。這和功率放大器是為了傳出訊號有所不同,例如廣播電臺。我們會使用功率放大器在NI RF 向量訊號產生器的傳送端來放大訊號。
另外,在向量訊號產生器的輸出端使用前置放大器會放大 Noise floor。前置放大器是用在 Noise floor 低於向量訊號分析儀的訊號上。換句話說,你會隨著訊號放大 Noise floor。
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