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Altera_Forum's avatar
Altera_Forum
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15 years ago

About Stratix 2/4 GX pre-emphasis.

Stratix 2 GX pre-emphasis has three parameters: pre-tap, 1st post-tap and 2nd post-tap.

I don't find their meaning in their handbook or in Altera website.

Which parts of the output wave is opposite to pre-tap/1st post-tap/2nd post-tap respectively?

Thanks.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    i asked someone and your pre-tap is correct, 1st post-tap is correct but not the 2nd post-tap. the 2nd post-tap is twice the width of your 1st post-tap (same starting position at the transition). 2nd post-tap is twice (2 bits) wide. Each tap is 1 bit wide.

    Hope this is right.