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Need Advice! Wiring Massive Building for Video/Audio Sends!

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Aaron Brenner
Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 8:00:17 am

Hello Cow!

I need some help. I know post production, and I don't pretend to be a pro in production environments. My edit suite is in a huge ice rink, and I want to set up feeds around the building. I'm planning to spend some (reasonable) money, so don't hold back.

I basically need to set up a couple patch panels in locations that are probably 350-400 foot cable runs. For each panel, I need 2 or 3 BNC coax cables that could potentially push SDI with embedded audio. I'd also like to have 2 XLR ports for audio.

What am I missing?

Do I need some kind of amplifier that will keep the signal clean? I expect the cables to be run near power, etc.

Can these cables run this far without interference?

Are there other cables you would run if you knew you were only going to run once? For future expansion, etc?

ANY help would be appreciated! THANKS!


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David Johnson
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 11:24:26 am

You might consider hiring a video systems integration company or, at the very least, an engineer since there are a lot of "gotchas" when you get beyond around routing signals within just an edit suite or to an adjacent room ... just a thought.


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Aaron Brenner
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 2:38:16 pm

Good idea. Do you know of any places in the Los Angeles area?


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Richard Crowley
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 2:59:07 pm

I am currently assembling an ultra-portable HD production unit (3-4 cameras, HD-SDI). My research has revealed that there is a limit of ~100M (~300 ft) for sending HD-SDI without active signal boosting. (Using RG-6 cable, 500ft with larger RG-11) I found this helpful...
http://www.petergray.org/hdsdi.html


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Chuck Pullen
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 3:40:32 pm

Richard is right, if you are thinking of pushing HD in the future, I would consider fiber if it's in your budget. You can get "Cubes" so all you would do is run fiber at your patch panels, and plug in the cubes when you want to use that location.

Chuck


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Aaron Brenner
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 5:14:34 pm

Where would I find these Cubes online? Is there a pre-made set up available for sale somewhere?

Thanks!


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maurice jansen
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 24, 2010 at 9:04:14 pm

Hi there

your on the edge of HD-SDI cable length's for copper.
if your going to use copper also be aware that every connector in your circuit have a bad influence on return loss. don't use patchbay's if you don't need them. DON'T try to recycle old MUSAfields they are very bad for HD.
other thing try to avoid TieWraps (or at least don't pull them to hard on the cable ) use velcro instead.

use good cable like Belden 1694A or Canare (forgot the number ;-)
bob knows

and if you really like plumbing you could use Belden 7731A
with a remarkable loss of 11,7dB on 100mtr's but it's a pain to install

and remember reclocking a signal near the critical cable length can introduce severe jitter.

grt
Maurice

People saying they don't make mistake's often make nothing at all!


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Bob Zelin
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 25, 2010 at 4:46:04 am

Aaron, Aaron, Aaron,

You are in Post Production. You work with AVID, Final Cut Pro, or Adobe products, right ? Don't you know who AJA and Blackmagic are ?
Both companies make relatively inexpensive fibre optic transceivers. You send your HD-SDI or SD-SDI signal into their box, run it thru a fibre cable (for about 1 mile if you like), over power lines, transformers, etc.) and on the other end you have the receiver end of your Blackmagic or AJA fibre box. And you know what comes out - CLEAN VIDEO with embedded audio. And guess what, BOTH COMPANIES make audio de-embedders ! WOW WOW WOW !

http://www.aja.com
http://www.blackmagic-design.com

Bob Zelin



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Aaron Brenner
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 25, 2010 at 5:36:00 am

Bob,

Thank you for showing me this stuff... for SDI or analog video withOUT audio, they are awesome! That fibre option is amazing!

What are my options if I'm forced to stick with analog audio and video?

Thanks!


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Chuck Pullen
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 25, 2010 at 6:41:07 pm

Sorry for not being more specific, the “cubes” are made by Telecast Fiber. They have several all-in-one broadcast solutions as does Multidyne.

http://www.telecast-fiber.com/telecast-telecube-modular-media-interface/

http://www.multidyne.com/productlist.cfm?CategoryID=92

Pricewise, Bob is leading you in the right direction with the Blackmagic recommendation, it appears their new fiber tx/rx’s are probably the cheapest available at this point.


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Bob Zelin
Re: Need Advice! Wiring Massive Building for Video/Audio Sends!
on Aug 25, 2010 at 10:17:34 pm

Aaron,
conventional analog audio no longer exists. Today, you EMBED the audio in the SD-SDI or HD-SDI video stream. If you only have analog audio, you buy an AUDIO TO SDI EMBEDDER, which will combine the analog audio channels into your SD-SDI or HD-SDI video stream.

And guess who makes these wonderful, inexpensive products -

http://www.aja.com
http://www.blackmagic-design.com

Take your video now with EMBEDDED audio, and send it across a standard fibre line with LC connectors, and you are done. You don't even think about distance, or reclocking, or transformers, elevators, Air Conditioning compressors - it's all over, no issues.



Bob Zelin



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