Berkeley CSUA MOTD:Entry 47565
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2007/8/8-13 [Computer/Networking] UID:47565 Activity:nil
8/8     Deal EE engineers. Can you please tell me if the following is
        possible? My condo offers HOA-paid basic DirecTV/Multiband
        (re-broadcasted into channel 2 all the way to 70) cable. It also
        offers TimeWarner broadband. There is only ONE cable going from
        the condo switch box into my unit, and I've been told that
        I can either get DirecTV/Multiband cable, or broadband cable, but
        not both since there's only ONE cable from the switch to my unit.
        Is there ANY way to combine them, say by using a "diplexer" to
        split the tv (channel 2-70) and broadband cable modem frequencies
        and then recombining them into one cable that goes into my unit?
        I talked to the tech support from DirecTV/Multiband and TimeWarner
        and they all said it's never been done, and I'm free to experiment
        but they just don't have the expertise to deal with this. Is
        this configuration even possible? Thanks for any advice.
        \_ It's probably more trouble than it is worth.  The channels
           are probably at the same frequencies so they cannot simply
           both be loaded onto the same cable, they'd interfere.  So
           you'd have to get special hardware to de-modulate all 70+
           channels from their original carrier frequency and then
           re-modulate the signals to channels which are not being
           used.  Now, since you propose to send ALL channels
           simultaneously over one cable, that would require de/re
           modulation of 70+ channels simultaneously--which is the
           domain of *really* expensive equipment.  It's possible you
           could play some sort of trick--like modulating all 70+ channels
           on one cable simultaneously with a single new carrier
           frequency, but the bandwidth requirement would be enormous
           and likely be similarly expensive.  Frankly, it's probably
           cheaper just to get them to run a second cable for you.
2025/04/04 [General] UID:1000 Activity:popular
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