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SixtoReport: D12 Satellite Info in Post#1 - Live!

Discussion in 'DIRECTV General Discussion' started by Sixto, Jul 27, 2008.

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  1. Feb 15, 2010 #2921 of 10270
    bobnielsen

    bobnielsen Éminence grise

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    Bainbridge...
    Isn't that what they are using (XIPS = Xenon Ion Propulsion System)?
     
  2. Feb 15, 2010 #2922 of 10270
    curt8403

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    they are supposed to last much longer than regular engines
    maybe outlast some of the electronics
     
  3. Feb 15, 2010 #2923 of 10270
    Tom Robertson

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    Capacity is everything. There are limits of course.

    The whole system is weight balanced for power, transponders, and fuel.

    Cheers,
    Tom
     
  4. Feb 15, 2010 #2924 of 10270
    LameLefty

    LameLefty I used to be a rocket scientist

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    Middle...
    Yes it is. :)
     
  5. Feb 15, 2010 #2925 of 10270
    tuckerdog

    tuckerdog Legend

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    Ladies and Gentlemen
    Obviously the knowledge base here is remarkable.
    Quick question.
    The testing was suppose to begin on 2/13 with the revised filing. Unless I missed the post, no confirmation yet of a signal coming from D12. Does that imply a delay or are there other tests which need to be done prior to testing the Transponders
    Just curious as my life is not going to change if D12 goes live a week or even a month late :)
    Thanks in advance
    Michael
     
  6. Feb 15, 2010 #2926 of 10270
    Sixto

    Sixto Well-Known Member

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    Testing is at 76°, which we can't receive.

    We'll rely on any FCC updates or the start of the drift to 103° in Mid-March.
     
  7. Feb 15, 2010 #2927 of 10270
    curt8403

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    in early testing the signal could pop on and off at random (so to speak) and may be only a carrier signal rather than something intelligent.
    it takes 3 to 5 days before we see anything definate
     
  8. Feb 15, 2010 #2928 of 10270
    tuckerdog

    tuckerdog Legend

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    Thanks for the reply

    I will wait with eager anticipation

    Michael
     
  9. Feb 15, 2010 #2929 of 10270
    cartrivision

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    OK, here's a question for the rocket scientists here... how much does the apogee have to be raised on a GSO satellite in order to drift it from 76° to 103° in 20 days, ignoring (or not) that in reality it might be slowly raised and then slowly lowered at the beginning and end of it's 27° trip.
     
  10. Feb 15, 2010 #2930 of 10270
    oldfantom

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    I thought sure either you or LL or P Smith would be camped out at the D* testing facilities, all dressed in black with your blacked out dish and an oscilloscope dialing in the data. Sort of like Whistler from the movie Sneakers.
     
  11. Feb 15, 2010 #2931 of 10270
    P Smith

    P Smith Mr. FixAnything

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    W.Mdtrn Sea
    Good idea, but I don't have spare AU-9 for the camping tour with spectrum analyzer. Imagine, sitting on a beach, do setup the 1m dish and SA ( it is portable, should lasts a couple hours), dialing to 76W and waiting days and nights when some weird spike signal start appearing then drifting to the left and right side of screen ( I recall that was during test of previous D10 or D11)...
     
  12. Feb 15, 2010 #2932 of 10270
    HoTat2

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    Los...
    It will be only a CW carrier signal for IOT at 76° as the STA allows for no other emission during the testing phase.

    DirecTV intends to plot the "gain-transfer" characteristics with an unmodulated carrier wave for each transponder at three points. The center or mid-frequency and upper and lower edges of all the transponders' frequency response curves.
     
  13. Feb 15, 2010 #2933 of 10270
    curt8403

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    we should define CW as some people see CW and thing CBS - Warner Bros. I think you mean Clock Wise?
     
  14. Feb 15, 2010 #2934 of 10270
    Tom Robertson

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    Good catch. :)

    I bet they also will test all the transponders spot, national, and spares.

    Cheers,
    Tom
     
  15. Feb 15, 2010 #2935 of 10270
    HoTat2

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    Los...
    No I mean CW as in "continuous wave."

    Perhaps I shouldn't have capitalized the letters earlier ... :)
     
  16. Feb 15, 2010 #2936 of 10270
    curt8403

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    No problem, we educate the masses, and make they appreciate all that Directv has to do to get more HD channels.
    :hurah:
     
  17. Feb 15, 2010 #2937 of 10270
    cartrivision

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    I don't see how that would be any more ridiculous than a couple dozen of us following (for 6 months and 3000 posts) a thread about a satellite being put into service.
     
  18. Feb 15, 2010 #2938 of 10270
    hdgreg

    hdgreg AllStar

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    As in all through the Holidays, and even more "pathetic" there are a whole lot of us viewing this thread right now, :confused:for a reason I can't quite define!
     
  19. Feb 15, 2010 #2939 of 10270
    curt8403

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    I'm at work, and bored stiff, this is better than folding paper.
     
  20. Feb 15, 2010 #2940 of 10270
    bobnielsen

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    Bainbridge...
    AKA "unmodulated carrier", in case some hams interpret CW as Morse code transmissions.
     
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