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LNB question

Discussion in 'DIRECTV Installation/MDU Discussion' started by birdie_ace, Apr 26, 2013.

  1. birdie_ace

    birdie_ace Mentor

    37
    0
    Apr 11, 2008
    I have been experiencing 771 errors and weak signals on my dish for some time now. Some days everything would work fine others not so fine. I finally had the dish realigned and all my problems went away - or so I thought.

    Last night I was watching the NFL draft for about an hour, when all of a sudden I started to get pixelation. Very slowly at first and then much worse and then 771. Some channels still came in while others did not at all. I quickly realized that the problems started exactly when the upstairs DVR started recording two shows at 9pm. The box that I was watching also started to record a show at 9pm. I have two HD DVR's with an SL3 LNB. I am pretty sure that there is nothing wrong with my boxes. I am also positive that my dish is correctly aligned. All signals prior to last night were in the 90's or high 80's.

    My thinking is something is not working correctly on the LNB, or should I be looking at the PI?
     
  2. carl6

    carl6 Moderator DBSTalk Club

    12,390
    906
    Nov 15, 2005
    Seattle, WA
    How many coax lines are coming from your SL3 dish?

    If there is only one line, that should go to a power inserter and through a splitter to your two DVRs. (The splitter might be before or after the power inserter.)

    If there is more than one line, then you must have four lines, two going to each DVR. If there are multiple coax from the dish, they cannot be split anyplace. If you need more than 4 lines, then you have to use a multiswitch (WB68 or equivalent wide band multiswitch).

    Your symptoms suggest you might have split a coax to feed multiple DVRs.
     
  3. peds48

    peds48 DIRECTV A-Team DBSTalk Club

    18,457
    919
    Jan 10, 2008
    NY
    Or perhaps marginal (moist, corroded) conectors
     
  4. birdie_ace

    birdie_ace Mentor

    37
    0
    Apr 11, 2008
    One coax line coming from dish into PI and then into 8 way splitter. Two lines leaving splitter. One line to each HD DVR.
    Came home from work tonight and all signal strengths back in the 90's and high 80's.

    No storms or bad weather last night either.
     
  5. carl6

    carl6 Moderator DBSTalk Club

    12,390
    906
    Nov 15, 2005
    Seattle, WA
    Okay, so SWM system. Try swapping the 8 way splitter with a 2-way or 4-way. Also make sure all unused ports have terminating resistors on them. And make sure the splitter is DirecTV approved green labelled splitter.
     

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