On our custom board we use the SYNC_OUT pin as a H-Sync output.
However the H-Sync provided by the SYNC_OUT pin jitters by up to 6 pixel clocks at a 1600x1200@60 resolution.
This jitter problem also occurs on the Advantiv EVAL-ADV7842-7511 Video Evaluation Board.
To get the evalboard running i used the script ":5-5b 1600x1200@60 UXGA RGB in_ 444 24bit H_V_DE HDMI:" from .
Based on the settings made by the script i changed the value of IO-Register 0x15 from 0xB0 to 0x90 in order to activate the SYNC_OUT pin.
Any clue what causes this pretty huge jitter and how to eliminate or at least reduce it?