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10. Settings
Image 10-19
W
ARNING
:
Lamp runtime reset as well as the lamp replacement can only be done by a Barco authorized
technician.
10.8 Input Balance
C
AUTION
:
The input balance adjustmentis only for Barco authorized technicians !
Introduction: Unbalanced color signals
When transporting signals, there is always a risk of deterioration of the information contained in the signals.
In case of information contained in the amplitude of the signals which is the case of data color signals (R, G, B),image 10-20 ,we
are quite sure that the amplitude of these color signals is subject to alterations.
An example of alteration may be a DC component added to the signal, in the form of a DC offset repositioning the black level, since
this
black level
(
“brightness”
) will become crucial later on ( clamping circuit) it will result in “black not being black”.
Another value that is subject to alteration is the amplitude of the signal, resulting in an altered “Gain” of the signal (
“white level”
or
contrast
).
The alterations of the three color signals will happen independently i.e. the colors will end to be unbalanced, image 10-21
B
Black leve
0.7V
Image 10-20
Black leve
∆
G
∆Β
∆
R
R
G
B
Image 10-21
Analog Digital Conversion
The analog color signals must pass through an Analog/Digital conversion circuit prior to any digital processing in the PMP.
A typical ADC transforms the analog value into an 8 bit coded digital signal.
The graphic shows that when converting a signal containing a DC offset component the range of the converter is not optimally used.
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R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28/04/2004
Summary of Contents for R9003110
Page 1: ...MGP 15 Medical Grade Projector Owners Manual R9003110 R5976741 00 28 04 2004 ...
Page 4: ......
Page 8: ...Table of contents 4 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 10: ...1 About this manual 6 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 30: ...4 Connections Image 4 13 26 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 44: ...5 Getting started 40 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 50: ...7 Main Menu 46 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 66: ...8 Adjustments 62 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 88: ...10 Settings 84 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 100: ...11 Tools 96 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 107: ...12 Video formats Image 12 16 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 103 ...
Page 108: ...12 Video formats 104 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...
Page 114: ...13 Information 110 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 ...