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LMH1297: about long cable characteristics.

Masazumi Ishii
Genius 3945 points
Part Number: LMH1297

Hello.

I have a question about LMH 1297 RTVT.

I have a question about long cable characteristics.

We are improving the characteristics for long cables.

We are implementing items 3.8.3 and 3.8.4 of the programming guide.

However, in addition to this method I am seeking ways to extend the distance.
Is there any other way?

Thank you.

LMH1297RTVT.pdf

  • 0
    TI__Guru* 93670 points

    Hi Ishii-San,

    Sections 3,8,3 and 3,8,4 are related to mute reference and 6-dB launch amplitude.

    1). Are you saying your signal launch amplitude is half of normal 800-mV launch amplitude?

    2). Also, section 3.8.4 is related to mute reference. It is not clear as to how this is related to long cable. Please clarify,

    3). Please advise if you have done return loss or 75-ohm eye diagram measurement on your board. 

    Regards,,nasser