Long Dinstance HD

[OUCaptain]

First off, I'm a bit out of my league on this one. I need to shoot an HD cam signal from a central point to about 15 LCD's, max hitting about 300'. I need to hit at least 720p, 1080i would be ideal. What can I do?

 

[newnameman]

Buy a long cable?

 

[OUCaptain]

Originally posted by: newnameman
Buy a long cable?

If I wanted useless BS, I would have posted in OT. I was hoping for some intelligent info.
HDMI maxes around 50 feet when pushing 1080.

 

[krotchy]

http://www.gefen.com/

Their boxes are a bit expensive but they have what you need, HDMI over CAT6, etc.

http://www.gefen.com/kvm/dproduct.jsp?prod_id=4719

or
http://www.gefen.com/kvm/dproduct.jsp?prod_id=4438
with these for the long runs
http://www.gefen.com/kvm/dproduct.jsp?prod_id=4503

 

[OUCaptain]

Thanks. Thats one of the products I've been looking at. I'm also looking at SDI as a possible transport. I can't seen to find any hard numbers on distance though. Any one have any expierience in this area. With SDI I can run it over standard RG6 quad shield to save cable cost if it'll make the distance.

 

[erwos]

You should think about using HDMI over coax, too.

 

[krotchy]

HD-SDI is really meant as more of a professional transmission protocol, although distribution amps for it are easy to come by. AJA is a good company to look at if you need HD-SDI devices, but I really think that route will run you alot more, as the cheapest decent HD-SDI monitor I know of is ~3K, and HD-SDI to HDMI/DVI boxes run around 1000 bucks.

Buying a 1000+ft of Cat5e cable + headers and a crimping tool would be tons cheaper than even a single HD-SDI converter.

 

[Modelworks]

Component .
If the signal degrades any then you could amp it at 150', but if you buy good quality cables it shouldn't be needed.
720P is guaranteed, 1080i is very possible with the right cables.

Used this for 410ft at 1080i without a problem.
Just get some quality ends.
http://www.firefold.com/Produc...e__BULK-COMP3-500.aspx

HDMI is a great protocol but it was never intended for distance.

 

[OUCaptain]

Originally posted by: erwos
You should think about using HDMI over coax, too.

I've never heard of that, care to elaborate?

I found out today that our distances will be upwards of 700 feet. It's looking like hdmi over cat5 will be the way to go and maybe hdmi over fiber for the longest runs. Pro grade might not be out of the question with this place though.

 

[Modelworks]

Originally posted by: OUCaptain

Originally posted by: erwos
You should think about using HDMI over coax, too.

I've never heard of that, care to elaborate?

I found out today that our distances will be upwards of 700 feet. It's looking like hdmi over cat5 will be the way to go and maybe hdmi over fiber for the longest runs. Pro grade might not be out of the question with this place though.

If your going to 700feet or more I would seriously consider wireless.
Its expensive, but you don't have the cable to worry with and install.

These work up to 1000feet and can be wired if need be, 1080i with audio. Broadcast frequency is in the 5GHZ range so that shouldn't encounter any problems with RF noise.
http://www.connectivity.avocen...cts/emerge/mpx1000.asp

About $2k for a transmitter and receiver.

I would try those with wireless first, and if that failed or was too far apart,then you could still use ethernet cable with the same boxes.

 

[Blurry]

I second the Cat5e method.

At my studio, we have a pair of Sony Z1U HD Camcorders for indoor filming. Since our editing room was 300 feet away and we wanted to capture the video via Raw 1080i in 4:2:2 color space, we used the following:

Cat5e cables
Component Cables
HD Capture cards by BlackMagic Design

The trick is to twist/solder the ends of the component cable to the Cat5e. I remember there was an excellent guide floating around on the internet on how to do this.
The end result? Excellent clarity with no degradation in quality.