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ADV7842 3D_Comb(TBC=Off) , Output picture has small waving noise issue at CVBS input.

Hello,

When I start 3D_Comb function, Output picture has small waving noise issue at when I used CVBS input.

However, this issue doesn't happen when I used Y/C input.

also, when I stopped 3D_Comb, this issue disappear even I used CVBS input.

System contens

3D_Comb = On

TBC=Off

64Mb SDR

It seems this issue is relating 3D Comb function.

How can I fix this?

Regards,

Bogey

Parents
  • Hi Matt,

    I set up EVAL-ADV7842-7511 with REPEATER.

    EVAL-ADVL7842 worked fine.  and I can connect RS232C with EVAL-ADV7842-7511.

    Here is enviroment.

    CVBC (NTCS source) --> EVAL-ADV7842-7511--> Momitor.

    There is no noise issue at this time.  I can see good Color chart without noise.

    However, I'm not sure 3D_Comb is working or not at this time.

    I tried to overwrite 3D_Comb enable bit.  but, I could not change "SPD MAP:12h[0]=1".

    My operation with CMAND LINE with REPEATER was

    "rep i2cw 784 9012 01 <CR>"

    then , I got ERROR comment.

    "UI: 35803 Command exction failed"

    Please advise operation how I can write "SPD MAP:12h[0]=1".

    Also, please tell me 90:12h is correct address of 3D_Comb enabled in EVAL-ADV7842-7511?

    Regards,

    Bogey

Reply
  • Hi Matt,

    I set up EVAL-ADV7842-7511 with REPEATER.

    EVAL-ADVL7842 worked fine.  and I can connect RS232C with EVAL-ADV7842-7511.

    Here is enviroment.

    CVBC (NTCS source) --> EVAL-ADV7842-7511--> Momitor.

    There is no noise issue at this time.  I can see good Color chart without noise.

    However, I'm not sure 3D_Comb is working or not at this time.

    I tried to overwrite 3D_Comb enable bit.  but, I could not change "SPD MAP:12h[0]=1".

    My operation with CMAND LINE with REPEATER was

    "rep i2cw 784 9012 01 <CR>"

    then , I got ERROR comment.

    "UI: 35803 Command exction failed"

    Please advise operation how I can write "SPD MAP:12h[0]=1".

    Also, please tell me 90:12h is correct address of 3D_Comb enabled in EVAL-ADV7842-7511?

    Regards,

    Bogey

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