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Cable Modem Freqs.?

Discussion in 'Electronic Design' started by Tam/WB2TT, Apr 4, 2004.

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  1. Tam/WB2TT

    Tam/WB2TT Guest

    Does anybody know what band or bands of frequencies a cable modem operates
    on? I want to look at the possibility of making a crossover network to
    connect a modem and TV to the same splitter port. Right now the modem only
    goes through one splitter. I do not want to add another one.


  2. Dave VanHorn

    Dave VanHorn Guest

    In my house, the main line goes to a four-way, and everything connects to
    Makes no difference which port I put the cable modem on.
  3. Richard

    Richard Guest

    The range of frequencies is huge - basically, the whole cable spectrum.
    Bands are 6MHz for NTSC (8MHz for PAL), with upstream between 5MHz and
    42MHz, and downstream between 88MHz and 860MHz.

    Providers typically stick to a few bands, but can easily change them on
    you. They also tend to prefer the lower-power rolloff regions at the
    ends of each spectrum, since they're more suitable for cable modems than
    for TV.

    Check out news://comp.dcom.modems.cable
  4. Tam/WB2TT

    Tam/WB2TT Guest

    Thanks, Richard. I was hoping it would be below 45 MHz for both directions.

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