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External grading CRT monitor not giving enough Chroma in FCP set up?
External grading CRT monitor not giving enough Chroma in FCP set up?
I have an Apple G5 Powermac Dual 2 gig with the very latest Final Cut 5 studio suite.
I am using a JVC TM-H150CG 15 inch CRT video monitor for grading colour and checking levels etc.
This Monitor is set up thus:
FireWire from G5 into a Canopus TwinPact100 analogue to digital converter (like AD-VC100). Then from the Canopus I have the composite (yellow) video lead going into the JVC CRT monitor via a BNC connector.
Set up like this the chroma (colour) is just not enough; even when set to maximum it seems to be not saturated enough for my taste. The colour on the Mac computer monitor (latest 20 inch flat-panal LCD with metal edges) is nicely saturated and very punchy, whilst the JVC looks very de-saturated in comparison.
Also, I can
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6 Replies
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[iMan] “I thought it might be the monitor so I phoned JVC UK and one of their technical engineers says if my Mac is putting out too high a chroma level then the monitor will (believe it or not) reduce the colour to compensate, hence, look de-saturated and faded.”
LOL.
Moving right along…
My first guess it that you don’t have the monitor input properly TERNIMATED.
Next to the compositite INPUT BNC, is there another BNC labeled “OUT” (or “OUTPUT)?
If so, you may need to plug a “75 ohm terminator” into the OUTPUT for there to be the correct “load” on the composite line.
If this is the problem, the monitor’s picture will drop in brightness about 40%, and the chroma levels should be much more normal.If you don’t have a terminator, just to CHECK to see if I’m right, temporarily connect your OLD monitor to the OUTPUT of your new one (just hook another BNC cable between them) and see what happens to the screen image on the new one.
Sometimes there is a “built-in” terminator in the OUTPUT of the monitor.
It can get “stuck open” (its a tiny switch inside the jack) and may need to have a plug inserted and “wiggled” a bit to snap it back to normal.
Or, just buy a “75 ohm terminator” plug and use it.Example-
https://www.connect-tech-products.com/index1.php?subtype=BNC%20Plugs&id=4Its the top plug on the page.
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The word is spelled “TERMINATED”.
Sorry.
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Thanks for that, I had a bnc plugged into the video out, which went into a VCR for proof VHS tapes, I had the video input set to out instead of in, once I unplugged the bnc from the back of the monitor all was fine.
Thanks for that one, great help.
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OK, compare what the solution was to what the “engineer” from JVC said. Am I the only one here that’s scared?
Arnie
https://www.arniepix.com -
Hmmm, I said to my partner, if it wasn’t for forums like the COW and all we had to rely on were engineers from big companies like JVC, we would all be screwed 😉
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The best cure for many common tech problems is “having a good MEMORY”.
i.e. “The last time I had an “X” problem, I had to do “Y” to fix it.”
People who actually WORK WITH the gear have totally DIFFERENT “RELATIONSHIPS” with the gear than those who are designers or repair-techs.
This is also the same contrast of “book-learnin’ vs. practical expereience”.
Education and theory are essential, but nothing can teach you more than the times you are “under-the-gun” and MUST solve problems “NOW”.So yes, these boards can connect people with similar experiences (and memories of problems-SOLVED.)
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