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White-Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white
balance adjustment.
First adjust PC mode and then adjust AV mode, before started adjust white balance, please setting the
Chroma-7120 MEM. Channel 1 to Cold color, MEM. MEM. channel 3 to standard color, MEM. and MEM.
channel 5 to warm color, ( our cold parameter is x = 300 ± 15, y = 310 ± 15, Y = 350 ± 7 cd/m2 ; ;standard
parameter is x =314 ± 15, y =324 ± 15, Y = 350± 7 cd/m
cd/m2),
How to setting MEM. channel you can reference to Chroma-7120 user guide or simple use " SC" key and " NEXT"
key to modify x, y , Y value and use "ID" key to modify the TEXT description
Following is the procedure to do white-balance adjust
Notes: Step of AV mode adjustment is the same as PC mode,
PC mode:
I. Press menu key, then press code 2 3
and a word "Factory" at the top of Menu.
1. In the factory mode select "COLOR TEMP" may be select the difference color temp.
2. Select SCALER Adjustment:
RG, GG, BG
RB, GB, BB
<Notes: the R, G, B gain use 9 bits, and R, G, B bias use 10 bits to save the value in EEPROM, so if the
R, G, B gain and bias is 255 to 256, the "P0 256" will change to "P10">
II.
Bias (Low luminance) adjustment:
1. Set the raster pattern (Black pattern with 1024×768) Input.
2. Set the contrast on OSD window to the value=80, Brightness set to "80"
3. Adjust the brightness on OSD until chroma 7120 measurement reach the lowest value.
III, Gain adjustment:
A. Adjust Cold color-temperature:
Color Temp.
x
PC MODE
y
Y
x
AV MODE
y
Y
R, G, B Gain adjust.
R, G, B Bias adjust.
2
;warm parameter is x =326± 15, y = 335± 15, Y = 350± 7
Cold(7500K) Standard(6500K) Warm(5000K)
300
314
310
324
350
350
300
314
310
324
420
420
4will into the factory mode, the OSD will show menu
37
Chapter 6
326
335
350
326
335
420
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