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示波器頻寬疑問

Jul 9th 2013, 03:00

我知道取樣時間是每個紀錄點的間隔時間
示波器LCD顯示波形圖形是由多個取樣點繪圖
但是頻寬這個規格是什麼意思??

假設今天有一個1MHz正弦波，那示波器的取樣率越大就可以越精細的繪圖
一般我看到的都是1GSa/s

請問頻寬70MHz、100MHz、200MHz都是1GSa/s的示波器差別在哪?

我之前使用都以為只要看取樣時間，現在要買一台才發現"頻寬"疑問，不知道該怎麼選擇?

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