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D10 Satellite - HD Anticipation and other posts

Discussion in 'DIRECTV General Discussion' started by lwilli201, Aug 23, 2007.

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  1. Aug 31, 2007 #161 of 8833
    John4924

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    Ken, do you happen to know of a post that describes the configuration of D10 [number of transponders, capabilities, etc.] I am sure there is one here, but I cannot find.

    Cheers,
    John
     
  2. Aug 31, 2007 #162 of 8833
    donshan

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  3. Aug 31, 2007 #163 of 8833
    John4924

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    Thanks donshan, that is what I was looking for :)

    Now, if I extrapolate this data, there are 32 active CONUS transponders (TWTAs) [and 55 spot beam] and I believe you can fit 4 HD channels on each transponder? So this means that D10 has the capability to handle 128 national HD channels. Am I thinking correctly here?

    And if this is correct, can they fit full resolution and full bit rates at 4 per transponder?

    I am just trying to understand the full capability here because I have been trying to explain this to some friends who are thinking of switching from cable to D* ;)

    Thanks and cheers,
    John
     
  4. Aug 31, 2007 #164 of 8833
    Ken984

    Ken984 Active Member

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    Bossier...
    You can't use all the transponders at the same time, D* and E* both use multiple sats in one location to load balance. There is simply not enough power available to run everything, some of the transponders are backups also, so if one fails they just move it to another. This also allows them to double power some transponders so the signal we get is stronger and is more rain fade resistant. D10 is setup now to do 16 national beams and spaceway 1 will handle the others although right now it only has 7 active transponders.
     
  5. Aug 31, 2007 #165 of 8833
    Tom Robertson

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    Actually, there will be 14 national beams, the others are spares. Lots of info in this thread: http://www.dbstalk.com/showthread.php?t=82295

    Spaceway 1 has a very large number of active "transponders" as spot beams, but only on 7 frequencies.

    Cheers,
    Tom
     
  6. Aug 31, 2007 #166 of 8833
    Tom Robertson

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    One needs to take great care in trying to puzzle out how many HD channels per transponder. With Ku, there is some amount of standardization on the bandwidth per transponder, but with Ka there is none. Today Spaceway 1 and 2 use 62.5MHz wide transponders, 12 times that of a broadcast OTA channel. So without blinking, 12 HD channels should fit without even correcting for differences in modulation or encoding (MPEG2 vs. MPEG4).

    Other transponders in the Ka band that DIRECTV will use are 36Mhz wide, 7x the usable bandwidth of a TV channel. I'm guessing that approximately 10 channels will fit without bit starving too much with good mpeg4 encoders and intelligent dynamic bit allocations.

    Cheers,
    Tom
     
  7. Aug 31, 2007 #167 of 8833
    RandybinSC

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    How?
    :)
     
  8. Aug 31, 2007 #168 of 8833
    Ed Campbell

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    Cripes! Here I am fixing a late breakfast, 5 minutes ago, and my cellphone rings. [No landline and Skype with no SkypeIn] - this is how anyone reaches me.

    And it's an automated call from D* reminding me to check and be certain my BBC's are connected and working properly.

    I'd say we must be getting close, for sure.
     
  9. Aug 31, 2007 #169 of 8833
    coota

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    Not sure if this is the correct thread for this question or not. I noticed a 103(a) and a 103 (b) when I look at the satellite transponders on my HR20-100. The 103(a) all have "- - " and the 103 (b) has 0's. What is the difference between the a and the b?
     
  10. Aug 31, 2007 #170 of 8833
    dbmaven

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    As discussed elsewhere, (a) is the existing Spaceway 1 satellite, (b) is for the new D10 sat when it "lights up".
     
  11. Aug 31, 2007 #171 of 8833
    John4924

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    Thanks for the info, Tom. So we can roughly say ~10 channels per transponder with 14 active would yield ~140 HD channel capability? And the other spot beams will be for locals?

    Now when D11 lites up next year, will they "move" some of the HD channels to do some load sharing between the 2 birds? And I assume D11 will have a similar amount of spot beams for locals?

    So I guess the bottom line I am driving at [to persuade my friends] is with D10 and D11 functional, D* will have a "metric butt-load" of HD capability :D And their capability will be far ahead of available content well into the future? ;)

    And thanks for all of your posts. They are always informative.

    Cheers,
    John
     
  12. Aug 31, 2007 #172 of 8833
    noneroy

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    I've been lurking a bit and would like to add one point of pure random conjecture into the pool.

    I'm thinking that they won't flip one switch and BOOM! all the channels will be on. I think they are going to do it slowly over the next month a few channels at a time. If you look at everything D* has done, it shows D* loves baby-steps (and with good reason). The HR-20? Limited to a small area before it went wide. VOD? Same thing.

    I think that they'll be DONE by the time of that awards show, but I think we'll just see a few channels at a time start to pop up. It makes the most sense too. If you work in small batches you make it easier to fix any problems that crop up.

    Oh well. I want it now, but in a month we'll all look back on this time and laugh....I hope..... :rolleyes:
     
  13. Aug 31, 2007 #173 of 8833
    purtman

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    "Someday we'll look back and this will all seem funny"
    Bruce Springsteen
    Thunder Road

    Do you think Springsteen knew in 1974 about all of this?
     
  14. Aug 31, 2007 #174 of 8833
    PWenger

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    That is a well reasoned, common sense arguement...and therefore probably won't be true. I personally expect feast or famine based on the fact that it makes no sense to do it that way.

    I work with Medicare everyday...maybe its made me jaded.:rolleyes:
     
  15. Aug 31, 2007 #175 of 8833
    Jeremy W

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    I've been getting those calls for months.
     
  16. Aug 31, 2007 #176 of 8833
    Jeremy W

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    They're going to turn on 20-40 channels at launch, and then additional large groups of channels over the next few days. It's not going to take a month, and they're not going to do 1 or 2 channels at a time.
     
  17. Aug 31, 2007 #177 of 8833
    purtman

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    Jeremy, why do you say that? Are you aware of something we don't know?
     
  18. Aug 31, 2007 #178 of 8833
    Herdfan

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    Teays...
    [cynic]

    No way will D* put 10 channel on a transponder at first. They will put a few and provide great PQ and get the buzz going about how great the PQ is. Then after they have gotten all the subs they can to convert over, they will very slowly over a couple of years reduce the PQ so that no one notices how bad it has gotten.

    History tends to repeats itself.

    [/cynic]
     
  19. Aug 31, 2007 #179 of 8833
    dragonbait

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    There are also the content providers to consider. Contracts with those providers may stipulate specific dates and/or conditions before D* can offer the channel to the general customer base. A channel that is newly offered in HD might not let D* start broadcasting until it has completed its own testing.
     
  20. Aug 31, 2007 #180 of 8833
    Jeremy W

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    I'm not aware of anything that hasn't been said publically. Eric Shanks said this a few days ago.
     
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