Video Signal Cable
Video Signal Cable
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How does an electrical video signal propagate down component/composite cables?
I can always find sources of information that explain the difference in terms of the video quality outputted but nothing about the actual way electricity is transmitted down one cable versus the other.
I was wondering if there would be any quality degradation of video if I were to use my cheap COMPOSITE cables to connect a component out to a component in on my Flat-screen LCD TV.
Also, I was interested in MAKING these myself with connectors, cables and some soldering. If anyone has any experience or expertise, it would be much appreciated. Thank you!
You need to learn about "Bandwidth" and frequency response in coax cables.
Video engineers take the max frequency of signal they expect to send down a wire or through a device and make sure the bandwidth is 3-4 times larger than the highest frequency signal.
Standard def video tops out at 4 mhz
HD Video tops out at 35 mhz
Your composite cable is made with coax with a bandwidth of about 12 mhz.
HD Rated cables have a bandwidth over 100 mhz
So you really want to use HD rated coax for your flat-screen TV.
I do build my own cables using Canare coax and Canare RCA plugs (expensive but worth it) but you need the special crimp dies and a crimp frame. You can buy the crimp frame for $24 from www.partsexpress.com. But to get real good crimps - you need the dies designed for the RCA plugs.
You do NOT need the special coax stripper, but you should get good with making precise cuts on coax. Practice on an odd piece of coax a few times before cutting your cables.
Canare coax is hard to find but Belden 7787A matches the performance and dimensions. The Belden web site has LOTS of good info including white papers, and RCA connector cross reference charts so you start out by buying stuff that work well together.
Note: BlueJeans makes cables for about $60 that are all HD rated and work well.
Good luck.
