I have been using 240 and 2407, and recently started using 2812. I encountered a strange problem, that is, I feel that the input impedance of the 2812 port is very low. No matter what signal, after be
When a signal is transmitted on a transmission line, if it encounters impedance discontinuity, signal reflection will occur. I want to know how the signal is reflected and why reflection occurs when t
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For example, if you click on a link of an avi file in IE, the media player will be automatically launched to play it. If you click on a link of a bit t file, the bit t program will be automatically la