線座科學測試影片
真係估唔到!<object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/9uhobsHs-_o&hl=zh_TW&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/9uhobsHs-_o&hl=zh_TW&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object> 見到個示波器跳跳下。時大時小。咁又表示咩意思？ 會有咁多扞擾{:1_348:} Mr George Cardas,professional cable maker! 怪不得要成起啲cable啦，我屋企有咁多線，點算﹖ 見到個示波器跳跳下。時大時小。
咁又表示咩意思？
captain688 發表於 2010-3-31 08:55 http://www.post76.com/discuss/images/common/back.gif
我諗佢係想睇下transient的變化 見到個示波器跳跳下。時大時小。
咁又表示咩意思？
captain688 發表於 2010-3-31 08:55 http://www.post76.com/discuss/images/common/back.gif
唔知係咪cable屏蔽做差.{:1_336:} 我唔知有無睇錯, 佢條cable open end既, 一邊無插野, 成條天線咁, 無shield梗係"揚"都無譜....用過scope 既都知呢個現象, 好正常.... 我唔知有無睇錯, 佢條cable open end既, 一邊無插野, 成條天線咁, 無shield梗係"揚"都無譜....用過sc ...
kennethtcp 發表於 2010-3-31 23:50 http://www.post76.com/discuss/images/common/back.gif
Yes, 當笑片睇就得... 都唔知點解條友忍倒笑...
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