There is no need for them to be exact. We use 1694 for a bunch of different types of cable.
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DYI Component cable - what's acceptable variance in legth?
I'm getting ready to run two DIY component cables. These will around 40ft in length.
I'm trying to figure out the best way to ensure all R/G/B cables are the same length. I don't want to terminate before running the cables, because I'm not sure how long they need to be.
What's the variance in lenght between the 3 cables in a component cable?
I guess one option is to tape the cables together from end-to-end, and cut both ends off even. But, even then, with possible twisting of the cables, I'm thinking its going to be hard to ensure all 3 are exactly the same length.
FYI, I'm using Belden 1694a cable if that's a factor.
I'm trying to figure out the best way to ensure all R/G/B cables are the same length. I don't want to terminate before running the cables, because I'm not sure how long they need to be.
What's the variance in lenght between the 3 cables in a component cable?
I guess one option is to tape the cables together from end-to-end, and cut both ends off even. But, even then, with possible twisting of the cables, I'm thinking its going to be hard to ensure all 3 are exactly the same length.
FYI, I'm using Belden 1694a cable if that's a factor.
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I believe Belden marks all their cable jackets every foot or metre with a running total of the length. So the easiest way to get them the same length is to start all three on a mark and count off from there. WRT length discrepancies, until you get into digital video, it's actually not that critical, however, it should be easy to get them within a cm or so.
Bob
Bob
They should be within an inch or two of each other.
It's important that there are no large length discrepencies with component cables.
Quote:
A component video signal requires 3 cables to carry the information, this information should arrive at the load t the same time, if it doesn't , you get 'ghosting' and 'ringing' effects in the mage.
A digital signal such as SDI, only requires one cable...there are no length discrepencies here.
It's important that there are no large length discrepencies with component cables.
Quote:
| WRT length discrepancies, until you get into digital video, it's actually not that critical, |
A digital signal such as SDI, only requires one cable...there are no length discrepencies here.
What kind of Cable can you use to make component cables? Is it just 3 standard RG6 cables?
Quote:
Yep. RG-11 (best for long runs), RG-6 (also excellent for long runs) and RG-59 (best kept to shorter runs) are all 75-ohm. RG-58 (as used by most cheaper after-market ready-made brands) is only 50-ohms but works well for most people at typical HT 1m to 3m lengths.
When using RG-6 it is best to go for "quad shielded" (two foil shields plus two braid shields), though some installers say that dual-shielded (single foil shield plus single braid shield) is arguably just as good if a good brand, such as Belden, is used.
The above applies to all 75-ohm AV usages ... ie. antenna RF, component/svideo/composite video, and coax audio.
| Originally posted by partialpaul What kind of Cable can you use to make component cables? Is it just 3 standard RG6 cables? |
When using RG-6 it is best to go for "quad shielded" (two foil shields plus two braid shields), though some installers say that dual-shielded (single foil shield plus single braid shield) is arguably just as good if a good brand, such as Belden, is used.
The above applies to all 75-ohm AV usages ... ie. antenna RF, component/svideo/composite video, and coax audio.
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