[SBE] Video DA Help

[Glenn Little WB4UIV]

We just bought a frame with Video DAs on EBay. Cost us about $35.00 
delivered. We have two frames with STM-85N cards. I will be removing the 
failed ones and moving the CB sync lines from these to my new frame if 
Video DAs.

To start with I will be pulling one sync line per rack into Master Control 
and getting away from all the looping that was done before I got there.

When I get done, I hope to have nothing looped and a spare line in each rack.

There was mentioned, earlier, about using different colors for the cable. I 
have used red to indicate a cable that will take us off air if removed. I 
use violet for sync.

Is there a standard for color coding video lines?

You might be surprised (maybe not) at what I have found under the floor. 
Someone needed audio in the studio. They piggy backed a cable on the 
connector going into the STL to get the audio. As soon as I found that, 
that line was cut.

I have found audio lines just twisted together. I guess that was a quick 
fix that never got fixed correctly. I am trying to clean this up.

We just redid the studio. About a week before hand, I started pulling 
cables back into the tech core that went into the studio and were not 
connected to anything. I now have a back room full of cable.

Now to get the documentation up to speed!

Thanks to all for the advice.

73
Glenn
WB4UIV
Assistant Chief WCIV TV





At 06:23 PM 11/28/07, you wrote:

>Glenn,

>

>Do yourself a favor...spend a few extra dollars and get enough DAs to send 

>each device its own sync.

>You'll save yourself the trouble of unterminating something upstream while 

>disrupting and/or losing sync on devices downstream.

>It's not worth the aggrevation....If you have spare slots in the frame, 

>get extra DAs and loop their inputs.

>It will be money and time well spent,

>

>Tony Cutraro, CPBE

>Ch. 28- Milwaukee

>

>

>----- Original Message ----- From: "John Peterson" 

><jpeterson at prairiepublic.org>

>To: "sbe member discussion mail list" <sbe at sbe.org>

>Sent: Wednesday, November 28, 2007 7:57 AM

>Subject: Re: [SBE] Video DA Help

>

>

>>I don't know the answer but I would think total cable length would be a big

>>factor.

>>

>>Critically timed analog devices I would avoid looping at all. If you need to

>>loop, loop just equipment within one rack.

>>

>>John F Peterson CSTE

>>Fargo, ND

>>

>>on 11/27/07 8:48 PM, Glenn Little WB4UIV at glennmaillist at bellsouth.net

>>wrote:

>>

>>>We are using GVG 8500 series Video DAs to distribute sync. How many devices

>>>can I safely deliver sync to from one port of a video DA?

>>>

>>>Thank You

>>>

>>>Glenn Little

>>>Assistant Chief Engineer

>>>WCIV TV/DT

>>>WB4UIV

>>>

>>>

>>>

>>>

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>>

>>

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>

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