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LMH1297: Non SMPTE framerates

Mihir Gupta65
Intellectual 2155 points
Part Number: LMH1297


Hi Team,

Can the LMH1297 be used for non SMPTE frame and data rates? Can you transfer standard coded info like 8b10b coding over the SDI using this part?

Regards

Mihir

  • 0
    TI__Guru* 93670 points

    Hi Mihir,

    LMH1297 can be used for non-SMPTE video frame format. Standard data coding such as 8/10 bits coding is less stringent than SMPTE data format.

    1). Please note, LMH1297 equalizer gain is optimized for SMPTE data rates. It can be used at other data rates but gain may not be optimized. Please use one LMH1297EVM and check using your desired data rate. Make sure you have eye margin to cover part to part variations.

    2). When using non-SMPTE data rates, LMH1297 will not be able to lock to these data rates.

    It would be best if you can use 8/10-bits-coded data but at SMPTE data rate to allow LMH1297 retimer to lock and deliver best eye opening.

    Regards,, Nasser