Vivitek RP56HD21, Руководство по обслуживанию

Страница: 11 / 82

Page8 of 79
3.6. Definitions
The full white pattern is defined as an all white screen produced by 0.7V video input to R,G,B.
Note
：
All measurements are done in a darkened room. Contrast measurements are done using a full white
screen and a full black screen.
Note
：
The uniformity calculations for brightnessis to be done using the following formula
：
Brightest
：
[(Max-Average Brightness)/Average Brightness]*100
Dimmest
：
[(Average Brightness-Min)/Average Brightness]*100
4. Electrical
4.1. Input and Output Signal Levels
Specification Units Minimum Maximum Typical Notes
Video input amplitude.
Composite video (CVBS)
Sync negative. V p-p 1.0 75 ohm.
S-video.
Luminance (Y)
Sync negative.
V p-p 1.0 75 ohm.
Chrominance (C)
NTSC color burst signal.
PAL color burst signal.
V p-p
V p-p
0.286
0.3
75 ohm.
75 ohm.
Components video.
Luminance (Y)
Sync negative. V p-p 1.0 75 ohm
Chrominance (Pb/Cb/B-Y) V p-p 0.7 75 ohm
10
1 2 3
6 5 4
7 8
9
11
12
13