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Question about Calibration Confusion

833 Views 12 Replies 8 Participants Last post by Cholerabob, Feb 25, 2005

Turtledoves

Discussion Starter · Feb 24, 2005

After reading some of the calibration comments, I'll admit to being pretty much ignorant concerning the process. Can anyone explain exactly what's involved? I assume the process uses a signal generator or DVD calibration disc, but does it also use a camera or some sort or sensor aimed at the panel? Are adjustments made from inside the service menu? Surely this must involve more than merely setting color, tint, brightness, and other common user adjustments. Thanks!

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joemama127

· #2 · Feb 24, 2005

I assume you mean a professional calibration which does involve the service menu but I'm not sure about the extra equipment. DVE and Avia (I have both

) mention the service menu but don't give any details on what to do.

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markrubin

· #3 · Feb 24, 2005

ISF Calibration involves use of a probe such as the GretagMacbeth Eye One Spectroradiometer which connects to a PC via USB: the Eye One has a suction cup which attaches to the center of the display (and frequently falls off!)

Milori makes a bundled system called the CF-6000: there are excellent products by other manufacturers as well

http://www.milori.com/products/professional/

Typically you set all user controls to factory default and do all calibration in the service menu, so that the user can still make menu adjustments without affecting the calibration settings: not all displays have a service menu you can access: e.g. Fujitsu: instead Fujitsu gives you a number of memories that you can use for calibrated settings

Each input should be calibrated with the source device that will be used: for example a DVD player: the calibrator will put in a test disc such as AVIA or Video Essentials and use the test patterns to make various adjustments: you can also use a signal generator, a DVE D-VHS tape, a test pattern from a broadcast (such as those shown on HD NET)

Main adjustments are greyscale and color balance ( there are others depending on the display)

Above is a brief overview of the process: you can learn a lot by being present during an ISF calibration as the tech explains the steps

See less See more

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Turtledoves

Discussion Starter · #4 · Feb 24, 2005

Markrubin: Thanks a lot for the explanation and link. That answers my question!

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msboc

· #5 · Feb 25, 2005

I read on one of the other threads that some people waited until they had used their set for a certain number of hours before they paid for a callibration. Can someone explain why and how long that time period should be for a Panny7uy series.

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markrubin

· #6 · Feb 25, 2005

Quote:

Originally posted by msboc
I read on one of the other threads that some people waited until they had used their set for a certain number of hours before they paid for a calibration. Can someone explain why and how long that time period should be for a Panny7uy series.

ISF calibrators will usually insist you wait until you have at least 100 and preferably 200 hours on the display before calibration

The phosphors in the plasma are brightest and dissipate more rapidly during this time period (think of a new florescent bulb ) and it is not even: the blue phosphors dissipate more rapidly

by having 100-200 hours on the plasma, you are past the point of the greatest change in output

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Cholerabob

· #7 · Feb 25, 2005

And if i might add, it is really a good idea to have it done, if your budget allows it. I had a lot of problems with my colors, false contouring etc...And after calibration, everything is now ok. Like i said if you can, go for it. Takes from 3 to 5 hours on average to have it calibrated. My tech use an hand held device pluged in the suction cup thing.

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msboc

· #8 · Feb 25, 2005

Here goes one more stupid question... Is there something in the tv that keeps track of hours used that you can bring up to the onscreen menu, or is hours used something I need to keep track of.

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markrubin

· #9 · Feb 25, 2005

Quote:

Is there something in the tv that keeps track of hours used that you can bring up to the onscreen menu, or is hours used something I need to keep track of.

most plasma displays have a menu you can bring up that displays hours of use

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jkochis

· #10 · Feb 25, 2005

I am getting my plasma calibrated this weekend from http://www.isftv.com/ .

This site has info on calibrating and instruments used. I have used DVD based myself but figured this was worth the investment since I am hooked on HDTV and want the best possible picture and want it to last long as well.

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big newt

· #11 · Feb 25, 2005

Since we are on the topic.....

Anyone in the Toronto or Newmarket area have a name of someone

who will come out in the cold north to do a calibration?

or maybe I should just pack it up in the ole truck and bring it on down south!! (place little smiley thing here)

Thanks

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