DS90CR285: DS90CR285 used with screen and has blurred screen

Hi Frank,

Many times the serializer and de-serializer are not the cause of the problem, but where the problem is observed. In order to help debug the issue, information is required throughout the data path:
- Do you have jitter characteristics of the clock source? This would be PCLK input to the serializer.
o What clock source are you using? Have you tried to change to a clean clock source? What are the results?
- What are the characteristics of the cable(s)? Do you know the attenuation / loss of the cables?
o You mention using on 4m cables (2x2). Have you tried to reduce the cable length? What are the results?
- Is the layout optimized for 100 ohm differential impedance?
- Have you observed the LOCK output of the deserializer? Does the device become unlocked when you observe the display jittering?
- Is the board optimized for high frequency in PCB layout? Customer is recommended to follow the notes on page 15 in the datasheet.
- What are the setup condition and pin settings on both Serializer and Deserializer?

Thanks,
Dennis