Handy information from our friends over at Blue Jeans Cable:
As you probably know if you've been shopping for cables, coax for most video applications is "75 ohm" coax--but what the heck does that mean, anyway? This article is a short, non-technical explanation of impedance, and its significance in video and other circuitry, for those who have always scratched their heads at this one.
Every signal input, and every output, has an impedance--this "impedance" represents the relationship between voltage and current which a device is capable of accepting or...
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