Barco RLS W12 User Manual - page 51

RLS W12  02/12/2014

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8.Image

8.9  Timings

H Total

Press     to adjust the horizontal total. 

Use this function to adjust the clock frequency of pixel sampling (horizontal pixel frequency of the analog input source 

generated by the ADC). If you notice flickering or vertical lines in the image, it means that the pixel sampling frequency is 

insufficient. You can use this function to adjust the frequency to achieve consistent image quality.  

The following image is an example of test image from an external signal source:

Adjust image quality by changing the 

value of horizontal total to smoothen 

the image.

In order to adjust timings the pattern should be used is pixel (on/off)

H Start

Use     to adjust the projected image’s horizontal position. 

If the projected image is not at the center of the screen (i.e. shifted to right or left) and ends up being cropped, use this function 

to adjust the image’s horizontal position. The following image is an example of test image from an external signal source:

Native picture

Skewed left

Skewed right

V Phase

Use  to adjust the projected image’s phase. 

 Use this function to adjust the phase of pixel sampling clock (relative to input signal). Should the image still flicker or show 

noise (i.e. edges on texts) after optimization, adjust phase accordingly.

V Start

Use  to adjust the projected image’s vertical position. 

 If the projected image is not at the center of the screen (i.e. shifted up or down) and ends up being cropped, use this function 

to adjust the image’s vertical position. The following image is an example of test image from an external signal source: 

原始圖面

圖面下偏

圖面上偏

Native picture

Skewed down

Skewed Up

 It is recommended that when adjusting the image, the horizontal total should be adjusted before the 

horizontal phase. However, if the image still flickers even after you have adjusted both, try lowering the 

image noise.