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LMH0071: supported DVB-ASI Packet mode and Burst mode

Nao
Genius 4905 points
Part Number: LMH0071

LMH0071: supported DVB-ASI Packet mode and Burst mode

Hi,

Our customer is considering LMH0071 and they have a question.
Does LMH0071 support both DVB-ASI Packet mode and Burst mode?

Regards,
Nao

  • 0
    TI__Guru* 88815 points
    Hi Nao,
    LMH0071 locks within 24ms. As long as this is acceptable then it can lock to burst or packet mode.
    Regards,,nasser
  • 0 in reply to Nasser Mohammadi
    Genius 4905 points

    Hi, nasser

    Thank you for your quick feedback. I have one more question.

    What kind of data does LMH0071 output, if the input is follwoing conditions?

    1. SDI data is always Hi.
    2. SDI data is always Low.
    3. SDI data is incompatible 10b/8b code.
    4. SDI data is inverted DVB-ASI.


    Regards,
    Nao

  • 0 in reply to Nao
    TI__Guru* 88815 points
    Hi Nao,
    LMH0071 is a deserializer. It extracts recovered clock and uses it to sample incoming data. Then this incoming data gets stripped and goes out to the 5 lvds pairs. If the data is constant high or constant low then it cannot recover the clock since there is no transition and therefor the device goes out of lock. On the other hand for cases 3 & 4 above, as long as this pattern comes at the right data rate - 270Mbps - device recovers the clock and outputs this data on the LVDS pairs.
    Regards,,nasser
  • 0 in reply to Nasser Mohammadi
    Genius 4905 points
    Hi, nasser

    Thank you for your quick feedback.

    Regards,
    Nao