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G90 settings.

 
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deronmoped



Joined: 03 Nov 2006
Posts: 1153
Location: San Diego


PostLink    Posted: Sun Sep 01, 2019 2:33 am    Post subject: G90 settings. Reply with quote


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OK, I been looking at the menus in the PJ and in the manual and I have some questions.

1) Color temp. What is the preferred color temperature setting for watching DVD material?
2) Color uniformity. Does anyone use this setting?
3) Brightness uniformity. Does anyone use this setting?
4) Normal de-focus. What should that be set at?
5) Internal oscillation mode. What is it and how should it be set?
6) Internal oscillation pattern. What is it and how should it be set?
7) Scan line shift. What is it?
8) ABG mode. With this on, why do I end up with lines at the top of the screen?
9) Sync route. What is it and where should it be set?
10) V shift. What is it?
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AFryia



Joined: 09 Mar 2006
Posts: 923
Location: S.E. Michigan VPH-G70Q


PostLink    Posted: Mon Sep 02, 2019 2:23 pm    Post subject: Re: G90 settings. Reply with quote

deronmoped wrote:

1) Color temp. What is the preferred color temperature setting for watching DVD material?
Personally 6500. However this is a color setting. You need to calibrate the machine so it give a true D65 when you select 6500.


deronmoped wrote:

2) Color uniformity. Does anyone use this setting?
3) Brightness uniformity. Does anyone use this setting?
I have these on although I don't notice any significant difference.

deronmoped wrote:
4) Normal de-focus. What should that be set at?

I believe I turned de-focus off. At the higher scan frequencies for DVD, Bluray there is an inherent de-focus. Maybe not so much on a G90, there was on an 8" G70.

deronmoped wrote:
8) ABG mode. With this on, why do I end up with lines at the top of the screen?
I leave it on. You see it during calibrations and such. Not so much watching movies/video. In my experience is if it shows up in your video feed something else is not right.


deronmoped wrote:

10) V shift. What is it?
I leave this set to Wide. I believe it controls the vertical offset/shift amount you can apply to the image within the raster. I found at the higher frequency I needed more shift control.


Just my 2 cents, your mileage may vary.

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HaydnG90



Joined: 22 May 2006
Posts: 1104



PostLink    Posted: Mon Sep 02, 2019 4:40 pm    Post subject: Reply with quote

Good info. I'll check to see what my G90 settings are this evening. I know color temp is set to 6500 but adjustments were made on the Lumagen XE+ to achieve best colorimetry.
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deronmoped



Joined: 03 Nov 2006
Posts: 1153
Location: San Diego


PostLink    Posted: Mon Sep 02, 2019 6:00 pm    Post subject: Reply with quote

Yeah, I have my G90 set at 6500. I set the gray scale for that. The image looks correct, although I could mess around with it to see if I can get it any better. I have always felt, if the complexions of people looked correct, everything else is subjective. I mean, how do you know if the color of a object is perfect, without having a side by side comparison.

I noticed that the G90 could be set for a beaded or mat screen. When I changed that setting the image would get brighter for the mat screen setting. I think when using a beaded screen, the uniformity setting would probably help the most. That and using a overly large screen, the difference might be more noticeable.

Is the defocus global, effecting all three colors. I though it might be for blue only.

I turned off the ABG mode as I would see the lines at the top of the screen in dark scenes. I did not notice any difference in image quality on or off.
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AFryia



Joined: 09 Mar 2006
Posts: 923
Location: S.E. Michigan VPH-G70Q


PostLink    Posted: Tue Sep 03, 2019 10:09 pm    Post subject: Reply with quote

deronmoped wrote:

Is the defocus global, effecting all three colors. I though it might be for blue only.
Blue certainly I'm not sure about the others. There is a table in the maintenance/installation manual that defines the degree of de-focus applied to each tube at a given frequency. I vaguely renumber red having a setting at the lower frequencies. I believe at ~720p and above only blue is de-focused, and at some point none is applied.

I made sure not to de-focus. My room is light controlled so I preferred the ever so slight extra sharpness to having more light output.

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