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Calman Dpg1200/1400 questions...

post #1 of 13
Thread Starter 
Hi!
anyone with one of theese that can confirm..or deny and explain

#1/ been trying figure out the high/low settings in dpg since i got it..think i got it now...
found out that using RgbHigh when using dpg's jpg patterns corresponds to/get same values compared to
when using RgbLow and Avshd video based patterns..did i get it right?
(running 1.02.21fw)

#2/ i measured the luminance on my pio plasma using the dpg's 100% small white pattern..but i get to high readings..?
I have contrast set previously using avshd to approx 42-45fl..
With dpg i get 55-60fl.? That cant be right..any ideas?
cheers!/Harry
post #2 of 13
Quote:
Originally Posted by hrc4u View Post

Hi!
anyone with one of theese that can confirm..or deny and explain

#1/ been trying figure out the high/low settings in dpg since i got it..think i got it now...
found out that using RgbHigh when using dpg's jpg patterns corresponds to/get same values compared to
when using RgbLow and Avshd video based patterns..did i get it right?
(running 1.02.21fw)

#2/ i measured the luminance on my pio plasma using the dpg's 100% small white pattern..but i get to high readings..?
I have contrast set previously using avshd to approx 42-45fl..
With dpg i get 55-60fl.? That cant be right..any ideas?
cheers!/Harry

To give equal readings, the windows must take up the same amount of the screen. Plasmas throw another curve when windows aren't equal because of their brightness/picture limiting circuitry. A larger window will cause that circuit to kick in and lower the set's output. Add in display and meter session-to-session variation, and you will see differences in readings. Remember also that RGBHigh is recommended by SpectraCAL partly in order to produce WTW and BTB output for setting the display to prevent clipping. I'm pretty sure this causes 100% White to be output at 255, 255, 255 instead of 235, 235, 235. If this is so, then the display will respond by putting out more light.
post #3 of 13
Quote:
Originally Posted by hrc4u View Post

#1/ been trying figure out the high/low settings in dpg since i got it..think i got it now...
found out that using RgbHigh when using dpg's jpg patterns corresponds to/get same values compared to
when using RgbLow and Avshd video based patterns..did i get it right?
(running 1.02.21fw)

If you mean with RGB High you get the same levels as with the AVS disc played through a blu-ray player, then yes that is correct.

Our quick start guide also has the correct settings: http://www.spectracal.com/downloads/...07-20-2010.pdf
Which is RGB High.

Quote:
Originally Posted by hrc4u View Post

#2/ i measured the luminance on my pio plasma using the dpg's 100% small white pattern..but i get to high readings..?
I have contrast set previously using avshd to approx 42-45fl..
With dpg i get 55-60fl.? That cant be right..any ideas?
cheers!/Harry

Did the other pattern have a much larger window? Plasmas' have power limiting circuitry so too much white on the screen will cause it to dim, it's likely the last pattern was too big triggering the circuitry.
post #4 of 13
Thread Starter 
hi!
Quote:
Originally Posted by sotti View Post

If you mean with RGB High you get the same levels as with the AVS disc played through a blu-ray player, then yes that is correct. .

i meant i have previously calibrated with a wdtv (dpg) box set at RGB Low and avs 709 disc..then now (when i got my real dpg-box) i compared grayscale..gamma etc agains dpg pattern and set at RGB High..
meaning that if using dpg to view video materials it needs to be on low...and for calman dpg patterns "jpg" it needs to be set on high?
if i set it high mode and run avs disc it's way off everything..



Quote:
Originally Posted by sotti View Post

Did the other pattern have a much larger window? Plasmas' have power limiting circuitry so too much white on the screen will cause it to dim, it's likely the last pattern was too big triggering the circuitry.

mm that could probably be it...hmm since i used calman apl small window from avs disc back then..gotta check it out

thanks!/Harry
post #5 of 13
Quote:
Originally Posted by hrc4u View Post

meaning that if using dpg to view video materials it needs to be on low...and for calman dpg patterns "jpg" it needs to be set on high?

We have not validated the DPG for use with video patterns. I haven't even looked at it myself. If the numbers agree with what you get from the device when configured in RGB high for jpgs, then it is likely correct.
post #6 of 13
Thread Starter 
ok..thanks..must be like that...the dpg/wdlive outputs different
depending on jpg's vs video....drove me nuts almost..

what whould be a good window size for setting contrast?
i think the 2-3%? dpg small window must not be good for that then...
since i measured the 55-60fl and that with pio tv's contrast only set at 23....the pio start clipping at 40 if i recall right..

thanks pro's!
cheers!/H
post #7 of 13
Quote:
Originally Posted by hrc4u View Post

ok..thanks..must be like that...the dpg/wdlive outputs different
depending on jpg's vs video....drove me nuts almost..

what whould be a good window size for setting contrast?
i think the 2-3%? dpg small window must not be good for that then...
since i measured the 55-60fl and that with pio tv's contrast only set at 23....the pio start clipping at 40 if i recall right..

thanks pro's!
cheers!/H

Once you get below the point where you're clipping there aren't very strict guidelines, anything between 20fl-60fl might be appropriate.

Usually I like between 30-40fl as long as it's not pitch black or direct sunlight.

As to the pattern size using the small ones would be appropriate.
post #8 of 13
Thread Starter 
Quote:
Originally Posted by sotti View Post

Once you get below the point where you're clipping there aren't very strict guidelines, anything between 20fl-60fl might be appropriate.

Usually I like between 30-40fl as long as it's not pitch black or direct sunlight.

As to the pattern size using the small ones would be appropriate.

thanks! but something is strange here...
did a quick check with the small window...to get down to 40fl i need
to turn down tv contrast control to 15 out of 60clicks!...can't be right..

it's a Pioneer 427xd btw...
/H
post #9 of 13
Quote:
Originally Posted by hrc4u View Post

thanks! but something is strange here...
did a quick check with the small window...to get down to 40fl i need
to turn down tv contrast control to 15 out of 60clicks!...can't be right..

it's a Pioneer 427xd btw...
/H

What do you get with full screen patterns at that setting.

Floating levels aren't at all uncommon based on the APL. you may just have to pick something that is sort of in the middle from what you get at full screen and what you get with tiny windows.
post #10 of 13
Thread Starter 
Quote:
Originally Posted by sotti View Post

What do you get with full screen patterns at that setting.

Floating levels aren't at all uncommon based on the APL. you may just have to pick something that is sort of in the middle from what you get at full screen and what you get with tiny windows.

fullscreen pattern gives me 26fl at pio setting 15/60..
tried the large window option also..that gave me 35fl at pio setting 15/60
thanks!/H
post #11 of 13
Thread Starter 
now spare time to calibrate again..
you use the small 2-3% windows when doing cms/gamut cal? or? (on a plasma that is)
cheers!/H
post #12 of 13
Quote:
Originally Posted by hrc4u View Post

now spare time to calibrate again..
you use the small 2-3% windows when doing cms/gamut cal? or? (on a plasma that is)
cheers!/H

Use whatever you use for grayscale.
post #13 of 13
Thread Starter 
Will try that! Thanks!
/h
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