Re: Serial+power over single coax cable

From: Paul Keinanen (keinanen_at_sci.fi)
Date: 01/20/05

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    Date: Thu, 20 Jan 2005 10:08:33 +0200

    On Wed, 19 Jan 2005 19:49:05 +0100, "Dejan" <no@spam.com> wrote:

    >I need to transfer ca. 5MB/S over coax cable, that should simultaneously
    >be used as a power supply line. There would be several stations, LAN-like...
    >Any suggestions?

    Some form of Manchester coding is often used, when you want to get rid
    of DC-components, which also would permit separating the DC power and
    the signal.

    As a coaxial cable has a large bandwidth, you could even send it on
    some RF carrier (say 30 MHz) and run FSK or even amplitude modulation.
    However, if this is done, you have to be careful about the line
    termination, the station branch lengths and the minimum distance
    between the branches.

    Paul
      

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