No, the equipment in the Youtube video is not an *analog* oscilloscope. Please take a look at 2:43 in the video. It looks like it is Tektronix DSA8300 Digital Serial Analyzer Sampling Oscilloscope.
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This equipment is made for BER analysis(Bit Error Rate) for serial data link.
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By the way, BIOS setup can only do certain things. If this is a CPU timing, RAM timing, or PCI-e timing issue, mini display port should have the same video problem. But many users said that only HDMI has problem.
Yes, yes, okay, fine, it's obviously a digital oscilloscope that does digital sampling of ANALOG waveforms. That's obviously what I meant.
I don't see the point of looking at a digital signal and discussing how clean the rises and falls are, which is what they were doing in the video, without having any actual discussion about whether or not the signal was stable and correct at the times it was supposed to be sampled by the receiver.
In other words, if the device was made to analyze bit error rate, why did nobody mention whether or not there WERE any bit errors rather than just discuss how pretty the signal looked?
As for my BIOS comment, my point was not that you can change the CPU clock specifically and that might fix the problem. My point was that these signals are programmable, and there's no reason to believe that the timing of the signal coming out of the HDMI port is not similarly programmable. In a previous post you made a comment that seemed to imply that signal timing could not be under software control and I was contradicting you.