Minolta EP1080 Manuel de service Page 48

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EP1080 Series Condential
4-9
4-8 Optical Performance Measure
Inspection Condition
- Environment luminance: 5 Lux
- Product must be warmed up for 3 minutes
- Distances from the screen: 2.5 M
- Screen Size: 60 inches diagonal
- Reset to default before measurement
1. Test equipment
Procedure - Test equipment: video generator.
- Test signal: analog 1920x1080@60Hz.
2. Brightness
Procedure - Full white pattern
- Use CL100 to measure brightness values of
P1~P9.
- Follow the brightness formula to calculate
brightness values.
☼ Brightness Formula
Avg. (P1+P2+P3+...+P9) x1.1 m²
Criteria  1400 ANSI Lumens 1400 ANSI Lumens 1400 ANSI Lumens
3. Full On/Full Off Contrast
Procedure - Full white pattern & full black pattern
- Use CL100 to measure brightness values of full
white pattern P5 & full black pattern B5 ( see im-
age: full white)
- Follow Contrast formula to calculate contrast
values.
☼ Contrast Formula
P5/B5
Note: P5=center of white image
Full white pattern
Full black pattern
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