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No MPEG4 or Severe Pixelation on All MPEG4 Channels, but SD/MPEG2 is OK

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by Drew2k, Apr 22, 2007.

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  1. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    You shouldn't have the WB68 mounted where it can get soaked. FWIW
     
  2. Drew2k

    Drew2k New Member

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    My WB68s (two of them) are inside, right behind the TV, so I know moisture is not my problem. I'm holding out hope it's the LNBs and a simple swap out will resolve the problem.
     
  3. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    From your "first?" post, it sounded like a temp issue. Bright sun on the dish....LNB marginal connection inside expanding.
     
  4. mikeny

    mikeny Hall Of Fame

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    Mine are:
    01-08: 98-58-0-97-96-57-NA-NA
    same as you for 17-24


    I'm still getting the pink/green blocky pixelation on 622 HD and 625 HD- but not every time tonight.
     
  5. stogie5150

    stogie5150 Godfather

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    Since D* turned on the New Orleans MPEG-4 locals they have been totally unreliable on my system too. I don't even try to watch them. I hope this isn't a harbringer of things to come when they get the new birds up...all my signal strengths are fine, too. :nono2:
     
  6. jspiewak

    jspiewak AllStar

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    I am also having the same sporadic HD local problems. I have 2 HR20's and when the problem occurs it happens on both units at the same time. I went out on my own and purched the powered 6x16 multiswitch, but it didn't help. I tried with BBCs on and off no change. I now have the service plan on my account and I'm hoping to get the LNBs or whole dish replaced to see if that is the problem. Tech coming this Friday, but it seems I've been getting the run around with D*
     
  7. mjburton

    mjburton New Member

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    add me to the list of MPEG4 channels going blank. (Wash DC area) It started last week (5/2) with a lot of pixelation on HD-Locals, and whithin a day, they (HD-Locals) were all gone (blank) and I sometimes get a "searching for signal 771"

    Installer will be here Thurs 5/10. I'll post any updates.

    Did we get a mass EMP or Sunspot or something?
     
  8. stogie5150

    stogie5150 Godfather

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    Feb 21, 2006

    UPDATE:

    I thought my problem was dish alignment. After consutling with the DBSTALK chat room technical team :group: , they and me decided that my dish needed re aiming.

    So,being a DIY kinda guy, I found some install instructions for the slimline dish, and set to work doing it. I brought a TV out to the dish along with my HR20.

    My results are as follows...I am in the New Orleans area, BTW, so my MPEG4 locals come from the 103 satellite.

    Before re-aim my signal levels were : 29 0 0 0 20 0
    TP 17-0

    After re-aim they Are: 88 0 0 50 93 0
    TP 17, 0

    A significant amount, as you can see. the dish is not that hard to re aim...the instructions were very good and if you follow them they will work. Having a TV at the dish is a big help, I believe.

    As an extra plus...all my other signals jumped to mid to upper 90's on all the other satellites 101,119. I don't think we see much here on the 99.

    So if you are having problems, be sure to check the signal first.:hurah:
     
  9. bonscott87

    bonscott87 Cutting Edge: ECHELON '07

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    That was my problem last fall as well. On 99 I only had low 50s and would lose MPEG4 in a fog. After tweaking the alignment I get 96 on my local transponder and boosted 101 signals from upper 70s to mid 90s across the board.

    Good alignment, which few installers do, is so important.
     
  10. Drew2k

    Drew2k New Member

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    UPDATE: The installer was here today. He called me before showing up, and it was the same guy that installed my HR20 and the Slimline and showed up for the first time I opened a trouble ticket for the MPEG4 pixelation. I mentioned changing the LNBs, but he really thought that wouldn't do anything.

    Luckily, the sun was shining and I had severe pixelation on my MPEG4 HD channels, so he got to see it.

    He traced every line form the dish inside and found one point of failure: I have a wall plate where the four runs come inside and go to the splitters/multiswitches. The barrels on the wall plate were not blue nor were they red; they were gold. He said these were the problem, as they didn't pass on the higher frequencies that MPEG4 needs. He changed the barrels to "higher quality" barrels, reconnected the four runs to the wall plate and ... no more pixelation!

    I really can't believe this was it, but the lesson is you can't just use any old standard off-the-shelf wall plates when you're going to be passing higher-frequency MPEG4/Ka signals ... you have to get barrels (aka couplers) that will handle those higher frequencies!
     
  11. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Strange isn't the word for it. Ka-hi goes to 2150 MHz and "most" type F was meant for below 1000 MHz. I've used the gold barrels in my system to 1450 MHz, but removed all when I upgraded to Ka. Now I've had to add one silver barrel in my system, with no problem.
    A true fact is: any connector can give you problems, regardless of its color.
     
  12. fredandbetty

    fredandbetty Godfather

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    Yep, same problem here in the metro Detroit area, we watched tv last night and had no problems, and this morning, all of the HD locals were fine, and sometine before noon, we noticed a LOT of pixellation, and changed to SD, then back to HD with no luck, so we watched SD for a bit thinking maybe it was a problem at D*.

    ten mins later, we checked again, and still nothing! ok, so now i start checking the HD channels 74- and up and they are fine, so i start with the RBR, and nothing, i re-run the setup and try again and still nada, so i call D* and explain it to them and they have me re-run the setup after asking if i had done a RBR, i did, and the really nice lady goes and 'pushes' the programming to the box and STILL nothing, so i get back to the phone , and find out that she has to have a tech stop by and sets an appt for...TOMORROW!!! YAY!!! and i have not tried removing the BBC's.... yet. i am at the point that i would like to have them come out anyways so they can check the alignment ( we have had a lot of heavy wind and rain lately ) , and some of the signals are a little low!!

    Long story but the tech mentions that our 90-day warranty for the box is up TODAY!!! WOW!! what luck because i forgot about it ( i was going to wait till the end to get the protection plan added to my bill) and since the install was scheduled for tomorrow, she asked if we wanted to add it, so the wife JUMPED on it!! ( COOL! ) we will have a tech out today with an extra box in case we have to have it replaced ( Hey, wait, i have about 6 DIRT and the last Grey's Anatomy to watch!!) Grrr!!!
     
  13. jfolliard

    jfolliard AllStar

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    excuse my ignorance but what is a barrel or coupler? - is this something I should check out? I'm a bare rookie at this stuff
     
  14. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    It is what could be called a female to female connector use to connect two cables [as they are males, with the center conductor sticking out]. Not to be crude as "males" have things sticking out & female have "innies".
    F to F "Type F" connectors are round & commonly called "barrels".
     
  15. Drew2k

    Drew2k New Member

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    [​IMG]

    In my case, there were 4 barrels in a Leviton wall plate and they needed to be upgraded to barrels that passed higher frequencies:

    [​IMG] x 4 in a wallplate: [​IMG]
     
  16. jspiewak

    jspiewak AllStar

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    Did the Technician provide these couplers?
    Where can I get the replacements from? Do they have a particular model # or name ? Or just silver over gold ?
     
  17. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Gold or silver doesn't really make any difference. Good or bad is it.
    These need to be made to work with [fit] 75 ohm cable. There is no internal change to these for "high frequency".
    The installer saw something he hadn't before and suspected it was bad. Blue, red, green, pink, sliver, or gold wasn't the problem. A bad connector was. I'm been working with RF cables [I'll just say a very long time] and would bet if I cleaned the "gold" connector & re-installed it, it would work fine. It takes so little foreign material, trapped in a connection to make it a bad connection.
    Every connection should be inspected & cleaned, if necessary, before mating.
    RF cables are not like your stereo cables or power cords.
     
  18. Drew2k

    Drew2k New Member

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  19. Drew2k

    Drew2k New Member

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    You're saying the color doesn't matter, but they seem to be keyed to the frequency the coupler/barrel will pass.

    Ex: http://www.showmecables.com/showProducts.asp?category_id=337

    1GHz - Red Insulator
    2.5GHz - Blue Insulator
    3GHz - Green Insulator

    If these connectors exist, isn't there a reason for them, so shouldn't anyone who needs MPEG4 be looking at these to ensure they have the right connectors, not necessarily just "clean" connectors??

    [​IMG]
     
  20. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I'm not sure of how much marketing BS is here.
    Now Type F came about for under 1 GHz system as a cheap connector.
    SATs are pushing twice that through it now.
    Since they need to fit 75 ohm cable their physical size is limited, leaving only the insulation and it's dielectric constant as a variable. Air has a lower dielectric constant than Teflon. Most commonly used insulation is similar to Teflon [as in not enough difference to account for a double or triple frequency range].
    The loss through a 1" connector, using the same insulation as RG-6 coax, just doesn't seem to add up.
    Could better manufacturing tolerances improve the quality of the connector "in general"? Sure, the yield of connectors that have less loss than "el cheap-o" ones makes sense. RF transmission is the "sum" of the line. Cable & connections. Every connection has a reflection degrading it forward signal.
    "In general" the mismatch is cable to connector more than the connector [barrel] itself.
    You can have a dead "short" or a complete "open" in an RF line and not have any problems IF they come at the right "time" in the wavelength. Move either down the line or up the line & they will kill the signal as they are then a "bad match".
    So "I think" a dirty connector had more to do with your problem than clear, white, blue, or red colored connector end.
    The only was to "know" would be to test each connector [with clean ends] on a network analyzer. This is where marketing & engineering departments clash. FWIW.. a good connector is better than a bad one..Duh.
     
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