Barco MCM-50, User Manual

Page: 134 / 147

13. MCM-50 Tools
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 13-14
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 50 microseconds higher than the critical range. This guarantees the display of
the actual frame without distortion and with minimum delay.
Adjusting the Sync Variance Limit
1. Make sure the required geometry fi le is active and select the scaled pattern Moving hatch.
To select the pattern, in the OSD, navigate to Installation > Scaled patterns > Moving hatch... and press ENTER to select.
2. Navigate to Display setup > Sync variance limit... and press ENTER to select.
Image 13-15
Image 13-16
3. In the dialog box that appears, starting at the lowest value, increase the value in steps of 25 until you get to the range where
frame tearing is clearly visible.
4. Further increase the value until this frame tearing disappears again.
5. Increase the actual value by 25 or 50.
6. Exit the menu.
130 R5909057 MCM-50 17/05/2016