CurtPalme.com Home Theater Forum

[Spanky Ham]

[gjaky]

[stridsvognen]

I feels so lucky that im located in europe, and dont have a Barco..

Im in the process of learning how to setup and run the G90.. Its very exiting, i have some isues im working on, when i get that under controle, ill try write up on how i feel about it.

[ElTopo]

A had all of the 9 inchers but ended with the Barcos.

Just my preferred projector. Marquee and Sony are also on that level

[stridsvognen]

[stridsvognen]

I noticed that my low level change a lot, looks like the brightness is drifting quite a lot under heatup, i did not time or measure anything yet, but is this normal behavior from a G90? that you can adjust brightness around 42 when cold, and and end up with a setting around 30 when hot, 1 hour later, not sure how long it keeps changing, im pretty sure its more than 30 min. Ill say it at least changed 15 IRE.

[gjaky]

On both of my NECs the 'black' backgound is pretty noticeable right after power on, and they fade to real black after 5-10 minutes or so. It could be the electronic or the tubes, note the filaments in Marquees are running during off state too.

[stridsvognen]

[stridsvognen]

Im tracking it now.

Brightness setting.

Cold 46

15min 34

30min 25

45min 24

My final setting from yesterday is 23, so it looks pretty stable after 30 min, but needs 45 min to be around perfect.

[stridsvognen]

Just got the last moome card today, testing bandwidth now, have a 817P 72hz 133Mhz, 1080P 60hz 155Mhz, 1080P 72hz 180Mhz profile.

It almost resolves the 133Mhz bandwidth. Might try to make a 817P 60hz profile to and see if that will be 100%

[stridsvognen]

This is 133Mhz running into 2 different moome cards, guess whats what. One is the last 3D card, the other is the first with 1 HDMI and component input.

[CIR Engineering]

craigr

[stridsvognen]

I just wonder why the new card looks so soft, its like there is a limiter, or slow start of some kind.. And the old card have some peaking, making.

Wonder if the peaking is in the moome, or its the G90.

This one is the old card. with the gamma add on board removed.

[tanwn]

Could it be you have the gamma or black level setting on the Moome 3d set incorrectly. It doesn't really look soft more like a contrast modulation sort of thing.

[CIR Engineering]

It also looks to me like the projector is not well focused (or converged). What does green or red only look like?

craigr

[stridsvognen]

reed and green and blue is the same, summ it up and you have the result of all 3 colors, no convergence is not 100%, but what you see on the picture is the difference on 2 different moome boards, running same setting, so the only difference is the moome card.

I actualy think i hit the color balance quite well on the vertical lines, its just darker on the new moome card, looks like it have a very slow rise time.

Changing pixel clock down to 80Mhz dont help anything, looks just the same, also putting a 155Mhz pixel clock looks close, so ill think most of the problem is the moome card.

As seen in the pictures the convergence is the same on both shots.

Craig, do you have a standard G90 with the last moome card you can run a 817P 72hz and do a shot like this to compare.? Ipad photo if you want it to look as bad as my shot.

Im running around 10,5fl on a 100" screen with no gain, so from here this is more or less as sharp i can make the G90 look with that output, i can lower the light output, and get much sharper lines.

Looking the tube face while playing, i see scanlines, so it cant de all bad.

[stridsvognen]

[CIR Engineering]

FWIW the G90 should really not bloom with default grayscale (green at MAX) and contrast at 80 with brightness at 50. If you are blooming before that than you may need to work on your electronic focus or you might have a bad PA board. Does the overscan change size when you look between a black field with white lines compared to a white field with black lines? If it does than your PA board may be bad and this will have a negative impact on focus.

craigr

[stridsvognen]

[stridsvognen]

Now i been playing a bit more with the moome cards, and its a bit wierd , but the new card seems to do better running 1080P 72 hz,

When adjusting contrast up and down while looking into the lenses, at the 1:1 pattern i notice a shift in the output of the vertical lines.. So i think i know whats going on..

There is quite some peaking in the G90 video chain, and it behaves different after what resolution, and output level its running.

I found a quite nice pattern to display this, just need to confirm my findings on the Marquee to, there i have a VIM where i can adjust peaking level.

The peaking is also visible on the pattern on my shot of the old moome card.


And thats where contrast setting and stuff comes into play.

Anyway i think i need to get the gamma crap on the new moome card disconected, and see if it needs a filter mod to do the bandwidth right.