Frame loss over CAT5e
Posted 22 March 2012 - 11:47 AM
Many thanks, Levelsound
Posted 22 March 2012 - 12:58 PM
Most likely culprit is the projector.
Posted 22 March 2012 - 01:39 PM
And the vision mixer, most vision mixers with built in synchronisers add 1 or 2 frames delay. Depends what setup you are comparing it with when you are noticing the extra delay.
This post has been edited by timsabre: 22 March 2012 - 01:40 PM
Designing gadgets for people
Posted 23 March 2012 - 06:51 PM
Also feeding PowerPoint on VGA through TVone C2 1100 down converter and into SE 500 on s video but very disappointed with the resolution as compared to VGA straight into the projector. Do I have to live with that?
Thanks again for the advice.
Posted 23 March 2012 - 07:36 PM
The delay is not coming from the CAT5 and TX/RX units.
In your experiment you swap from VGA down the CAT5 to composite down a bit of coax. This means, I assume, you are using different inputs on the projector and/or different outputs on your source. It's there that your problem lies.
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Posted 23 March 2012 - 08:32 PM
No, the Rx will not be passive, it will be active (as evidenced by the power LED on it).
It's just that the Tx will supply the power to it down the Cat5, along with the balanced component signal.
I quite agree though, component via them, down 35m of Cat5, should not be causing 5 frames of delay.
Posted 23 March 2012 - 10:31 PM
Yes, yes you do.
Posted 24 March 2012 - 12:47 AM
It IS possible (though unlikely) that the component input on your projector has more delay than the composhit input.
But seriously PAL isn't suitable to a modern conference - hire a better switcher which can process RGBHV at 1024x768.
Posted 25 March 2012 - 02:51 PM
Sleepytom you recommend a change to RGBHV for the future. Unfortunately I have just bought both the SE 500 and the TVone down converter C2 1100. To the future I suppose I could still run the cameras through the SE 500, into a new switcher that will also take VGA and on in RGBHV. The C2 1100 is looking a bit redundant. Am I on the right track?
Wish I had asked these questions here before making the commitment!
Posted 25 March 2012 - 10:32 PM
We should also ask about the cameras at this point. What are they? If they are modern "HD" cameras then you'll find the composite outputs have some delay from the downconversion in the camera.
It's kind of a horrible time to get into doing video, the industry is in the midst of going HD and investing in SD kit could be seen as a little short sighted. Having said that most presentations are still 4x3 most confrences are still running XGA and the projector manufactures seem to be slow on the uptake when it comes to HD resolutions at affordable prices (the dissapearence of Sanyo has left a real question-mark over the future of lower end professional projection, panasonic may or may not start to produce affordable mid brightness machines, but nobody seems to know quite what the future holds currently)