伴伴學 Accomdemy
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    --- tags: 活動共筆 --- # 20210727 伴伴學:皮爸陪你開箱示波器 RIGOL-DS1054Z (第二回合) --- * I2C decode ![](https://i.imgur.com/ZfgLo2q.jpg) * 接地線的雜散電感 建議不要使用探棒本身附帶的接地鱷魚夾。利用單心線/吸錫線繞在接地環上,並把單心線/吸錫線的另外一頭焊接在待測點的最近的接地點 * 利薩茹(Lissajous)曲線(又稱利薩茹圖形、李薩如圖形或鮑迪奇(Bowditch)曲線)是兩個沿著互相垂直方向的正弦振動的合成的軌跡。 利薩茹曲線由以下參數方程定義: {\begin{cases}x(\theta )=a\sin(\theta )\\y(\theta )=b\sin(n\theta +\phi )\end{cases} \begin{cases}x(\theta )=a\sin(\theta )\\y(\theta )=b\sin(n\theta +\phi )\end{cases}} n稱為曲線的參數,是兩個正弦振動的頻率比。若比例為有理數,則 n= q / p,參數方程可以寫作: {\begin{cases}x(\theta )=a\sin(p\theta )\\y(\theta )=b\sin(q\theta +\phi )\\0\leq \theta \leq 2\pi \end{cases} \begin{cases}x(\theta )=a\sin(p\theta )\\y(\theta )=b\sin(q\theta +\phi )\\0\leq \theta \leq 2\pi \end{cases}} * 李沙育圖形法(Lissajous pattern method)應用於測量頻率的原理。如果我們在示波器的X/Y display format,分別輸入相差90度的正弦波電壓時,示波器所顯示的圖形,我們稱之為李沙育圖形。 假設我們在輸入頻率相等的兩個訊號於X/Y display format,則螢幕上可能出現:圓形、橢圓或是一條傾斜的直線。至於是哪一種圖形,則端視兩輸入電壓之大小和其相位(phase)而定。 假若X/Y display format均不加入任何訊號的話,螢幕的光點將出現於固定的位置 ![](https://i.imgur.com/zwraRZV.jpg) * Decode時 建議開啟"高解析度", 可獲得較好的波形。 * 顯示類型 :向量/點 * 向量: 自動將波型點與點連接 * 點: 波型點與點 不連接 * 訊號干擾:spike、麵包板、接點、杜邦線... 都會影響 * 斜率類型:上升、下降、上/下緣(在不確定訊號時,可使用) * Scope 前面 TypeA (USB Host) * Scope 後面 TypeB (USB Device) --- ## Question * RIGOL-DS1054Z 能看 eye pattern (眼圖) 嗎? MSO5000系列才有內建 * Bode plotter量測? DS1054Z 不支援BodeBode量測,沒內建訊號產生器,不能作Close loop 量測。。 --- ## Reference * DS1054Z Bode Plotter GitHub : [DS1054Z_BodePlotter](https://github.com/jbtronics/DS1054_BodePlotter) * LAN : UltraScope [software](http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0053/0/-/-/-/-/file.zip) 可以透過 UltraScope 遠端操作 YouTube Video:[Remote monitoring and control of your instrument with UltraScope](https://www.youtube.com/watch?v=dSlXBx6GW0Q) * RIGOL SOFTWARE DOWNLOAD : [software](https://www.rigolna.com/download/) * Bad Apple Oscilloscope GitHub : [Bad Apple Oscilloscope](https://github.com/yeonzi/badappe_oscilloscope/tree/master/src) ---

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