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Thread: Modulation in BEYOND

  1. #21
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    Quote Originally Posted by dnar View Post
    Are there any A/B photos available to compare the results?
    Yes indeed. Here is a the same test pattern with the same projector. Can you guess which one has the color board installed?!

    The color board had a number of improvements, not just rise time/fall time. It featured a differential front end receiver, protection and input offset and gain. In my opinion, input offset and gain had a greater effect on modulation and was sometimes the only thing needed to resolve issues. Having rise time/fall time adjustments was just a bonus!

    Anyway, I had to stop making these as my office was being slowly taken over by kids () and the lack of free time. So Stanwax took over and is making these now. I have not seen a version of his board however it should function exactly the same. I should also mention that Bill at Pangolin had a huge roll in the color boards becoming a reality, thanks Bill!

    Click image for larger version. 

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  2. #22
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    Quote Originally Posted by DZ
    I have not seen a version of his board however it should function exactly the same.
    It does function exactly the same.

  3. #23
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    Quote Originally Posted by Jem View Post
    Sadly not, although there are probably a few generic photo's of beams I took some time ago although nothing that would correctly demonstrate the improvement.
    I can absolutely vouch for this.

    I saw Jem's projector the week before it went off to have the colour correction board fitted, then again the week after it was fitted (we had a couple of private mini lems).

    The difference was jaw dropping with beams. I hate to think how good the difference with graphics was.

    With beams everything was so clean and sharp in an almost unquantifiable way. Difficult to describe in words but eg in a fan, all the colours had perfectly cut sharp cut offs and all the colours themselves were so pure. Without the board there's a blending goes on that you just can't notice unless you see it without but its as if the colours are dirty. Imagine a multicoloured towel covered in dirty mud from eg a football game, then imagine a brand new towel put side by side. That's the difference.

    I can say the ILDA test pics DZ has put up really don't do the difference justice.

    With the colour board fitted, Jem's projector blows my non corrected Kvant out of the water. A colour board is an absolute must have in my opinion.

  4. #24
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    some dacs and software packages are beginning to implement this natively. i approve of doing this in hardware inside the projector, but it's nice to see there other other options.

    Quote Originally Posted by White-Light View Post
    I can absolutely vouch for this.

    I saw Jem's projector the week before it went off to have the colour correction board fitted, then again the week after it was fitted (we had a couple of private mini lems).

    The difference was jaw dropping with beams. I hate to think how good the difference with graphics was.

    With beams everything was so clean and sharp in an almost unquantifiable way. Difficult to describe in words but eg in a fan, all the colours had perfectly cut sharp cut offs and all the colours themselves were so pure. Without the board there's a blending goes on that you just can't notice unless you see it without but its as if the colours are dirty. Imagine a multicoloured towel covered in dirty mud from eg a football game, then imagine a brand new towel put side by side. That's the difference.

    I can say the ILDA test pics DZ has put up really don't do the difference justice.

    With the colour board fitted, Jem's projector blows my non corrected Kvant out of the water. A colour board is an absolute must have in my opinion.
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

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    Could you post more details on the available boards/suppliers. Are there different board set ups? Is it one board with several channels? How to tune? Will it work in a configuration with DPSS.diode,AOM and galvo/flag etc? This sounds like a must do so I'm interested in how.
    Thanks

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    the ethredream dac has controls for color delay adjustments. i don't want to threadjack by posting more here.

    Quote Originally Posted by planters View Post
    Could you post more details on the available boards/suppliers. Are there different board set ups? Is it one board with several channels? How to tune? Will it work in a configuration with DPSS.diode,AOM and galvo/flag etc? This sounds like a must do so I'm interested in how.
    Thanks
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  7. #27
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    The only problem I see with having a fix in software is if you were running more than 1 projector on a DAC. You can fix one projector but who knows on the 2nd or more projectors if running multiple. It just makes sense that the fix for different modulation responses should be right where the problem exists, inside the projector. If you have just 1 projector and 1 DAC, then yeah, having a software fix would be nice.

  8. #28
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    yes. that's an excellent point.

    Quote Originally Posted by DZ View Post
    The only problem I see with having a fix in software is if you were running more than 1 projector on a DAC. You can fix one projector but who knows on the 2nd or more projectors if running multiple. It just makes sense that the fix for different modulation responses should be right where the problem exists, inside the projector. If you have just 1 projector and 1 DAC, then yeah, having a software fix would be nice.
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  9. #29
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    I took a look at the board supplied by Stanwax. It looks as if he will be out of town for the next week. In any case this looks straightforward, however I'm wondering are the adjustments useful primarily for the DPSS. Do the direct diode lasers such as the 445/645 operate identically and do not need to be tuned relative to each other?

  10. #30
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    your 445 and 645 will have different modulation characteristics.

    Quote Originally Posted by planters View Post
    I took a look at the board supplied by Stanwax. It looks as if he will be out of town for the next week. In any case this looks straightforward, however I'm wondering are the adjustments useful primarily for the DPSS. Do the direct diode lasers such as the 445/645 operate identically and do not need to be tuned relative to each other?
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

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