I came to this thread to understand better the technical signal transfer differences between HDMI and HD-SDI, for the most part I have learned a great deal so I thank u all for that.
The reason I am making this post is purely to point out to anyone else coming to this thread for the same reason, is that there is some fundamentally false information being given out by jiujitsu35.
Let me just explain the key to understanding digital information travelling along cable in laymans terms, so to avoid any confusion.
If you sent 2 identical parcels out to the same destination 100 miles away, 1 by motorbike and 1 by skateboard. would the package at the end be the same or different?
The point is not about the quality of the parcel, its about the speed and efficiency it gets there.
jiujitsu35 claims that the end result is different between different types of cable, however this is fundamentally and physically impossible. Digital data is not affected in the same way as analogue data when travelling along cable. When analogue signal travels along cable there is a long list of variables which can affect the end result (picture quality). But when a digital signal travels it is in the form of "yes" and "no" commands.
What the bottom line here is: If all the "yes" and "no" commands reach the end successfully then the result will be 100%, therefore the end result is "as good" as the source sent it and nothing (as in 0.00000000000%) different than that.
If jiujitsu35 did indeed see a difference when changing between copper and silver, it was not because of the cable. Actually the only difference in using a silver cable instead of copper, in a digital format, is length (A silver cable could carry sufficient signal further than copper), and just to clarify - 30 feet or meters isn't even close to the threshold.
On the other hand what jiujitsu35 claims about silver being a better conductor than copper is 100% true. In an analogue format there would indeed be an improvement in quality of the end result (whether or not a human eye can see this is besides the point). However, in a digital format it is actually impossible for there to be any difference.
What is being claimed here is some kind of "matter of opinion" on the topic. However there are facts to life which are absolute, like the laws of physics, and there are no opinions on how digital information passing through cable works, only facts.