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Noise in the DVI Output of ADV7511W

Hi,

We are using ADV7511WBSWZ for DVI Output in our board. The set up is as shown in the attached image.

The cables used for connection are shielded.

We have observed that, there are white blinking dots on the output (On Monitor).

We tried to display only one primary color(any of the three) bar on the screen, with darker color the dots are not visible, but with lighter shades of the same color( with mix of other two primary color) dots are visible.

Have anyone have come across this kind of issue ?

Please help us to solve this issue ASAP.

Thanks & Regards,

Nanjunda M

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  • FormerMember
    0 FormerMember
on Jun 6, 2016 1:05 PM

SXGA60 has a clock rate of 108MHz.  If the intra-pair skews are 50mm different, this could cause a problem.  From the math from here, HDMI Layout Guideline , I calculate intra-pair skew should be less then 20mm.  This can cause what appears to be noise depending on the data channel to clock channel length ratios.

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  • FormerMember
    0 FormerMember
on Jun 6, 2016 1:05 PM

SXGA60 has a clock rate of 108MHz.  If the intra-pair skews are 50mm different, this could cause a problem.  From the math from here, HDMI Layout Guideline , I calculate intra-pair skew should be less then 20mm.  This can cause what appears to be noise depending on the data channel to clock channel length ratios.

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