PCI clock

pygh · 发表于 2005-7-13 17:37:08

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请问大虾们一个问题PCI clock是方波还是正弦波？谢谢

easyma · 发表于 2005-7-14 10:55:38

方波，建议你拿个显波器观察

pygh · 发表于 2005-7-14 12:57:23

哦,谢谢

jingli888ca · 发表于 2005-7-22 13:38:57

It really depends on the equipment you use to observe the clock waveform.
If your oscilliscope is 100MHz+, then it is quite possible for you to observe a sine wave. If it is around 50MHz, then it is possible to get a square wave.
A good oscilliscope will be able to show you the quality of the clock. If you see a pure sine wave, then congratualtions, you have a good oscillator and probably a good clock buffer.
If you see some funny distortion, like mountain shape, or even tilt mountain shape, too bad, your clock suffers from a jitter or a phase problem.
In logic analyzer, it always show up as a square waveform..

weiheyingfdj · 发表于 2006-11-23 12:07:35

没看明白啊！！oscilliscope是啥？

infinite · 发表于 2007-3-22 13:09:37

oscilliscope 是不是示波器啊

lazyboy · 发表于 2007-5-2 01:31:10

對啦~是方波啦~

lazyboy · 发表于 2007-5-2 01:32:33

Oh....another question...

lazyboy · 发表于 2007-5-2 01:35:37

Oh...another question....what is distortion mean??? And if I have a good scope,why the pci clock show me sine wave?? So....Isn't it mean the pci clock is sine wave..??

PCI clock

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