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Utilize SDI for an equalizer-only app

Posted: 28 Oct 2011 ?? ?Print Version ?Bookmark and Share

Keywords:serial digital interface? cable equalizer?

The adaptive cable equalizer is a significant component in the serial digital interface (SDI) used for transmission of digital video signals. It restores the SDI signal after it passes through hundreds of meters of coaxial cable, automatically adjusting to reverse the effects of the cable loss. The cable driver's role is to set the appropriate amplitude, slew rate, and eye shape to drive an SDI signal into the coaxial cable so that it can be properly recovered by the equalizer at the other end. The LMH0387 SDI configurable I/O accomplishes both of these tasks with a single pin, allowing a BNC attached to the device to be used as either an input or output. It provides the full functionality of an adaptive cable equalizer and cable driver. The LMH0387 includes an integrated return loss network which enables very good return loss and easy compliance to the Society of Motion Picture and Television Engineers (SMPTE) return loss specifications. The versatility of the LMH0387 allows it to replace an equalizer or cable driver (or both) while providing several additional benefits.

View the PDF document for more information.

Originally published by National Semiconductor at as "Configuring the LMH0387 for an Equalizer-Only Application".

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