![background image](http://html.mh-extra.com/html/barco/r92112071/r92112071_user-manual_474314103.webp)
7. Advanced
There is a coarse and a
fi
ne adjustment of the position, use ENTER (when slider box is displayed) to switch
between the two.
7.8.4
Sync variance limit
What can be done ?
The sync variance limit allows to generate a certain delay between the incoming signal and the processing of it. It is expressed in
microseconds.
The reason why this delay is needed is because the signal processing in the projector is faster than the source signal itself.
If the sync variance limit value is set too low, the previous frame will be processed. This implies that the delay between incoming
signal and display of it will be large (16 ms). No image distortion will occur however.
If the sync variance limit value is only just high enough (= critical value), it might be possible that sometimes the actual frame is
processed and sometimes the previous frame is processed. This will lead to a
jumping
image or frame tearing (= image distortion).
The best value for the sync variance limit is about 200 microseconds higher than the critical range. This guarantees the display of
the actual frame without distortion and with minimum delay.
frame B
frame B
frame C
frame B
frame D
frame D
x
frame B
frame A
frame C
frame B
frame D
frame C
v
x (= sync variance limit) is critical
v (= sync variance limit) is too small (<x)
frame B
frame B
frame C
frame C
frame D
frame D
z
z (= sync variance limit) is good (>x)
incoming signal
signal processing
in PMP (1st step)
incoming signal
signal processing
in PMP (1st step)
incoming signal
signal processing
in PMP (1st step)
Image 7-88
Sync variance limit
How to adjust the Sync variance limit ?
1. Make sure the required geometry
fi
le is active and select the scaled pattern
Moving hatch
2. Press
MENU
to activate the Tool bar
3. Press
→
to select the
Display setup
item
4. Press
↓
to Pull down the
Display setup
menu
5. Use
↑
or
↓
to select
Sync variance limit...
6. Press
ENTER
R59770198 BARCO SIM 7D 13/02/2013
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Summary of Contents for R92112071
Page 1: ...Barco SIM 7D User Guide R92112071 R92112072 R92112073 R59770198 10 13 02 2013 ...
Page 8: ...Table of contents 4 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 10: ...1 Introduction 6 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 14: ...2 Packaging 10 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 39: ...4 Installation Image 4 40 Location of the IR receivers R59770198 BARCO SIM 7D 13 02 2013 35 ...
Page 40: ...4 Installation 36 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 54: ...5 Setup 50 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 80: ...7 Advanced Image 7 41 Image 7 42 Image 7 43 76 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 108: ...7 Advanced Image 7 95 Image 7 96 Image 7 97 Image 7 98 104 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 154: ...7 Advanced 150 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 174: ...B GLD alignment 170 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 176: ...Glossary 172 R59770198 BARCO SIM 7D 13 02 2013 ...
Page 182: ...List of tables 178 R59770198 BARCO SIM 7D 13 02 2013 ...