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Why TVP5146 output signal fading away

David888888
Intellectual 420 points
Other Parts Discussed in Thread: TVP5146

Please help.

The output signals of TVP5146 in my deisgn are fading away in sequence from MSB to LSB.

What is the possible reason for this?

Anything associated with analog ground or digital ground connections?

Many thanks for your answers.

David.

  • 0
    TI__Mastermind 43875 points

    David,

    I am not sure what you mean by "fade away" ? Do you mean the voltage level drops or that the binary value encoded on the data lines decreases?

    What do the sync outputs look like?

    Can you show your schematics?

    Have you checked your power supplies at the TVP pins?

    Do you have anything connected to the digital outputs so that you can look at the video image that is being decoded? What does that look like?

    BR,

    Steve