One of my customer finds that the ADV7611 has a jitter problem at the resolution of 1920*1200@60HZ. But this can be fixed by setting the register as below:
0x68 0x9D 0x02(default) ---> 0x68 0x9D 0x0F（custom）
However, we don’t have any released documents to illustrate the meaning of this register. (No illustrations in ADV7611 SOFTWARE MANUAL.PDF and ADV7611 Register Settings Recommendations.PDF. I only have these two documents. )
So the customer is asking for us the clearly definition and illustration of these registers. Do we have some other documents to answer the customer questions?
Or do we have some explanations of the equalizer settings which I can share with the customer?
The customer also finds that if he adjust the settings of the value of 0x68 0x8e more and 0x24 or less than 0x16, the issue also can be solved. Shown as blow.
0x68 0x8e 0x1e(ADI recommended) -----> 0x68 0x8e 0x24(or more)
0x68 0x8e 0x1e(ADI recommended) -----> 0x68 0x8e 0x16(or less)
however, we don't have much information about this register either. the customer also wants to know more about these registers and what is the "dynamic mode range".
These recommended values they have subsequently qualified and tested in our evaluation board. It might require some different value other than recommended value on your custom board.
But they are not documented. They sometimes change from recommended settings version to version.
For Equalizer settings, As per expert comment "ADI recommended scripts use manual mode". Different manual EQ settings are recommended for video standards below 576p and standard above 576p . For more information refer recommended settings document.
And also EQ_DYN1_LF, EQ_DYN1_HF, EQ_DYN2_LF, EQ_DYN2_HF etc have different functions in manual mode or dynamic mode. In dynamic mode these bits set the equalizer settings for each frequency band. In manual mode these registers set the equalizer settings for HDMI input port A and port B respectively. Here they have explained briefly about this https://ez.analog.com/video/f/q-a/7276/questions-for-your-adv7612
thanks for your reply. but it is the exactly what I am confused.
you mentioned that ‘Different manual EQ settings are recommended for video standards below 576p and standard above 576p’ and when I refer to the https://www.analog.com/media/en/technical-documentation/evaluation-documentation/ADV7611_Recommended_Register_Settings.pdf
this document still don't describe clearly if the video resolution above 576P what should to do for the equalizer.
so do we have more information of the equalizer settings?
We have the only description, what design support file supported document refers, other than that need to check with part specialist on this.