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Barco SIM 7D User Manual

Barco SIM 7D
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7. Advanced
Thereisacoarseandane 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 le is active and select the scaled pattern M oving 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 v ariance limit...
6. Press ENTER
R59770198 BARCO SIM 7D 13/02/2013
99

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Barco SIM 7D Specifications

General IconGeneral
BrandBarco
ModelSIM 7D
CategoryProjector
LanguageEnglish

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