How To Diplex OTA with the AT9 dish & MPEG-4

Discussion in 'DIRECTV Installation/MDU Discussion' started by Cap'n Preshoot, Aug 19, 2006.

  1. f150intally

    f150intally Mentor

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    Nov 5, 2007
    Well I ran the extra cable and am receiving signal strengths in the 90s for all local affiliates. I got lucky though. Having 9 foot ceilings in my house, local building code calls for the framers to install cross-studs at 4.5ft that run cross ways between the vertical studs. As you can imagine, this is a nightmare when you have to drop extra wires. I must have been thinking about this when I built my house because on the wall cavities adjacent to the wire drops through the wall my trusty stud finder picked up these cross-studs. However, the one where the wire dropped was straight through. I got lucky :hurah:

    thanks for the help guys... bottom line here was that I think there is a physical distance limit between the b-band module and the receiver.
     
  2. Marty999

    Marty999 AllStar

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    Mar 15, 2008
    I am in the process of replacing my HR10-250 with an HR 20-700. I’ve had OTA on the HR10-250 (with diplexors) and plan to keep it for the HR 20 (my reason for getting it). I’ve had a 5 LNB dish all along. I am, planning to move the HR 10-250 to another room until I replace it later on. I also have several legacy SD D*Tivos, which I am not rushing to get rid of. I have a WB68 multi-switch outside with 7 of the 8 outputs in use – serving 4 rooms.

    After reading many excellent posts here and other threads, I am trying to decide on the best approach going forward.

    Here are three options with their pros and cons:

    Option 1. Direct OTA feed to the HR20-700 and adding BBC’s to the HR20 inside the House (I would move the current diplexor set-up to serve the new location of the HR10-250, which consists of a diplexor exiting the WB68 outside the house and another just before the receiver inside the house).
    Pros – likely the simplest, but I need D* to run the new OTA wire inside the House. This presumes that the OTA signal can be split before to go to two locations, so I can have one OTA direct feed to the HR20 and the other continue to feed the diplexor to serve the HR 10-250.
    Cons – It’s seems pretty temporary. As soon as I add another HR20, I need to redo the diplexor set-up used for the HR10-250 since it won’t work on the HR20.

    Option 2. Move the BBC up closer to the WB68. Continue to use the WB68 but move the BBC closer to the WB68 (it’s only 10-15’ away and rearrange the diplexors.) Not sure this is possible in my instance since I’d need to install the BBCs outside, where the WB-68 is and needs to stay. What if I can cover these somewhat? Are there any other options?

    One other question -- Would the set up of an HR21 with an AM21 involve the same steps to deal with the diplexors? Or would I have to go with option 3?

    Option 3. Replace WB68 with a SWM.
    Pros – simplify’s wiring. One line carrying both Sat and OTA diplexed inside the house; No BBC’s needed
    Cons – SWM expense. I’m not really comfortable setting it up my self; also need to get power to the SWM. Is getting power as simple as plugging in the power to an outlet no less than 15’ away? Can the SWM be outside?

    I've seen the links for buying the SWMs, but am I to presume that D* will not set them up for customers yet?
     
  3. TreyS

    TreyS Legend

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    Aug 22, 2006
  4. Marty999

    Marty999 AllStar

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    Mar 15, 2008
    My set up for Option 2 above (moving the BBC's closer to the WB68) would require having the BBC outside. Does anyone have experience with them being outside? Are we talking shorting out the system or just wearing out more quickly? Any suggestions for covering or enclosing them?
     
  5. diverdra

    diverdra New Member

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    Feb 19, 2008
    If I update my D* dish to the 5 LNB Ka/Ku dish and a WB68 multi-switch, will my current DirecTV receivers still work (obviously not able to support MPEG-4 HD channels)? Specifically, I have Hughes HD-DVR250 & Hughes HTL-HD

    I’ll be adding HR21 receiver at a later date and would like to do the dish now.

    Thanks!
     
  6. carl6

    carl6 Moderator Staff Member DBSTalk Club

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    Yes, the 5-LNB dishes are fully backward compatible with older receivers. Simply use the round or 3-LNB option on your older receiver as applicable.

    Carl
     
  7. harsh

    harsh Beware the Attack Basset

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    Jun 14, 2003
    Salem, OR
    Do the dish now and you gain nothing. You'd have to buy and install the dish and multiswitch entirely on your dime. Do it when you get your HR21 and it costs you nothing. There are much better ways of spending that money with DIRECTV.
     
  8. PixelFreak

    PixelFreak Cool Member

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    Jan 1, 2008
    I have my SWM-8 installed and working correctly. I have the power inserter off of what we will call wire run A with an HR21 in the front room, and the second wire run B directly to my bedroom HR20. Both are working flawlessly with dual tuner capability.

    I want to know if I can send my Comcast Internet cable into the OTA input of the SWM-8 and then diplex it off cable run A in the front room so I can have internet there?

    Basically, there is a separate run completely isolated from the D* SWM-8 runs (call it wire run C) that only has Comcast Internet on it. I need to move the cable modem from that room into the room with wire run A (front room, power inserter) and want to know if it is possible by feeding it into the OTA of the SWM-8?

    If this is possible, will the power inserter on that leg cause any problems?
    Would I need to diplex it out before or after the power inserter (which is in the front room in the entertainment center before the receiver)?

    TIA,
    PixelFreak
     
  9. harsh

    harsh Beware the Attack Basset

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    Salem, OR
    You need to find a different way. Cable modems aren't fond of splitters. It is likely that the SWM will clip off the non-OTA ranges that the modem needs.

    DOCSIS modems send in the range of 5-42MHz (well below channel 2) and receive in the range of 85-860MHz (above channel 6 to UHF 78).

    I'd recommend fishing an Ethernet cable or going with a wireless setup. Even at the reduced speed of wireless connections, you'll still outrun your cable connection.
     
  10. PixelFreak

    PixelFreak Cool Member

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    Jan 1, 2008
    That's is what I thought - argh.

    I am already set up with a couple of wireless bridges in the house, so it works, but would love to have it back in the main room with run "A." Oh well, it's not worth fishing wires over at this time.

    Thanks.
     
  11. docspencer

    docspencer Cool Member

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    Dec 4, 2007
    I've tried to follow much of this threat - all pretty technical for me, but I think I understand the basics.

    Now - the 64,000 dollar question - does this all work for the HR-21?

    I'm thinking not, but please tell me I'm wrong......
     
  12. houskamp

    houskamp Active Member

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    Sep 14, 2006
    Same rules apply..
     
  13. jefbal99

    jefbal99 Hall Of Fame

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    It will once the AM-21 add-on is released
     
  14. TreyS

    TreyS Legend

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    Aug 22, 2006

    It will only work with he HR21 after you get the AM21...


    http://www.dbstalk.com/showthread.php?t=123012
     
  15. May 2, 2008 #295 of 323
    DtvSlave

    DtvSlave Legend

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    Nov 14, 2007
    I have this working correctly at my house using a 6x8 switch, however today we tried to do this with a 6x16 switch using security camera feed instead of ota. we had the diplexer setup on tuner 1 of the dvr and we got all zeros on the transponders.

    Temporally we removed the bbc (i know this will cause us to lose the 103) and now we get signal and camera feed. Any ideas why this wouldn't work? We have swapped out the bbc's and diplexers to make sure they were good.
     
  16. May 2, 2008 #296 of 323
    carl6

    carl6 Moderator Staff Member DBSTalk Club

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    Was the security camera feed modulated onto a VHF or UHF television channel, or did you insert composite level video? The former (modulated) should work just fine. The latter (composite level video) would certainly cause the symptoms you saw, and could (at least a remote possibility) case other problems or damage.

    Carl
     
  17. May 2, 2008 #297 of 323
    Matt9876

    Matt9876 Hall Of Fame

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    No problem with diplexed OTA antennas, Many long term installs with diplexed OTA.

    As long as you follow the diagrams / rules on page 1 and it functions correctly the first time, Long term success is likely.

    Our area now has it's locals from DirecTV and no conflicts reported with the antenna on diplexed units.:)
     
  18. May 3, 2008 #298 of 323
    DesertFlyer

    DesertFlyer Legend

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    Aug 27, 2007
    I am in the same boat as PixelFreak, and it's too bad to see it probably won't work as I have some fairly complex networking requirements that require my cable/modem be near my computer (wireless will not work). Has anyone actually tried diplexing a cable modem signal with success or failure?
     
  19. May 3, 2008 #299 of 323
    DtvSlave

    DtvSlave Legend

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    Nov 14, 2007
    We just ran it into the ota on the hr20 just like we would an off air antenna, but for some reason running it that way (6x16 > bbc > diplexer > (one line) > diplexer > out to sat 1 & ota), caused us to have 0's on the 119, 110 and 101.

    Added
    Customer has a 6x16 feeding 5 hddvr's, if they went with the swm8, am i correct that they would need 2 of them an 5 PI?
     
  20. May 3, 2008 #300 of 323
    harsh

    harsh Beware the Attack Basset

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    Only 1 PI per SWM.

    What channel (or frequency) does the security camera modulate on?
     

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