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Max coax run length for MRV

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by snowtrooper1966, Aug 27, 2010.

  1. matt

    matt New Member

    4,858
    1
    Jan 11, 2010
    The benefit is that the ICK will actually connect you to the internet, VS doing nothing, because the ethernet connection gets disabled on the HR24 when you use the built in DECA for MRV. :)
     
  2. snowtrooper1966

    snowtrooper1966 Cool Member

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    0
    May 15, 2010
    Well, that sounds like a big benefit! ;-)
    I forgot the Ethernet is disabled when MRV is active...
    Wonder if I can get ICK installed without it being on the work order.
     
  3. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

    42,683
    348
    Dec 9, 2006
    This is starting to sound like there wouldn't be any problems.
    My dish to last receiver is at least 100' and I have both a 4-way & 2-way splitter.
     
  4. matt

    matt New Member

    4,858
    1
    Jan 11, 2010
    Call back and add it to the order
     
  5. snowtrooper1966

    snowtrooper1966 Cool Member

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    0
    May 15, 2010
    Nice!
    Installer just left.
    Wound up with HR24-200 & H24-(700?).
    ICK installed as well.
    No black crush, Dolby Digital is fine.
    MRV working....
    Haven't checked on demand yet, but everything seems great!
    Thanks for the help, gentlemen!
    BTW dsw2112, is that a Rush reference?
    One of my favorite bands!
     
  6. TomCat

    TomCat Broadcast Engineer

    4,153
    100
    Aug 31, 2002
    That should not be a problem. RG59 has the same frequency response curve and characteristic impedance as RG6, but the loss at any frequency on RG6 is about 3/4ths the loss on RG59 for identical lengths. IOW, your 75 ft of RG59 is electrically the same as (and should perform like) 100 ft of RG6 as regards signal levels.

    The other factors are loop resistance and integrity vs. a hostile environment. RG6 is used not only for lower losses, but is hardier and holds up longer out in the weather, just from its sheer physical size. RG59 will also have a higher loop resistance, so if there are DC voltages involved, the higher voltage drop over the cable will limit lengths somewhat. That limitation is concurrent with the signal level limitation, so in essence you are running up against a similar limitation in a DBS L-band scenario (either the signal loss or the loop resistance limits the length, but both at about the same place). But for shorter runs, there should be no issues, really.
     

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