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Signal loss on 129° (Problem resolved)

Discussion in 'General DISH™ Discussion' started by Lincoln6Echo, Sep 13, 2011.

  1. jadebox

    jadebox Godfather

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    Dec 13, 2004
    Yep ... it was human error.

    Those articles are talking about Low Earth orbit (LEO). That's where the International Space Station lives. It's a much more crowded, and messy, place than the higher altitudes where the Dish satellites are located.

    The chance of space debris damaging a Dish satellite is pretty low. The chance of something hitting a satellite are much lower at the higher-orbits, where the Dish satellites are located, than in lower orbits such as where the International Space Station travels.

    Not only is there much more space between things at the higher altitude, but most everything launched into that orbit is put on a trajectory to go into a geostationary orbit. So, the relative velocities of anything at that altitude are very low. And there's much more control over what goes into the higher orbits.

    LEO, on the other hand, is where there's a lot of junk. Parts of rockets that carry satellites into orbit sometimes become satellites themselves. And it doesn't help when China crashes one satellite into another on purpose.

    Solar flares on the other hand .....

    This problem happened just after NASA announced the possibility of a major solar event. So, my first thought was that a solar flare might have done something to the satellite or that the operators of the satellite might have put the satellite in a "safe mode" to avoid damage.

    -- Roger
     
  2. fudpucker

    fudpucker Godfather

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    Jul 23, 2007
    NW Iowa
    How do you do a check switch and what does that do?
     
  3. Jhon69

    Jhon69 Hall Of Fame

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    Central San...

    Menu-6-1-1.Verifies you are receiving the satellite signals from each satellite.It will also reload the programming guide.
     
  4. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    Jan 18, 2007
    Northern...
    On my ViP 722 and 612 DVR's, it is Menu, 6, 1, 1, Check Switch, Test. It will do a test. When you back your way out through all the menus and it will do a satellite acquisition and then download a menu update.

    It tests the switch to see which satellite signals are being passed from the switch to your receiver. I don't know why it goes through the menu update after backing out through the menus, but it does.
     
  5. BillJ

    BillJ Icon

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    May 5, 2005
    So the South Park guys were right. Blame it on Canada.
     
  6. kenglish

    kenglish Icon

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    Oct 2, 2004
    Salt Lake...
    That's how us Southerners do things...big, and right.:D
     
  7. Dave

    Dave Icon

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    Jan 28, 2003
    So how long before the Sat quits moving around and I can get a steady signal? 129 is still a problem. Keep getting the unplug receiver to do a reset. Or I may just have a bad receiver. Guess I'll have to call Dish arg!!!!!
     
  8. Dave

    Dave Icon

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    Jan 28, 2003
    Will the Sat find its right orbit by Mon.?
     
  9. runner861

    runner861 Icon

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    Mar 20, 2010
    This is a very nice residential setup, probably the best that I have seen. Thanks for posting it. If I ever live in the right location I will try to set up something like this.
     
  10. levibluewa

    levibluewa Icon

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    Aug 13, 2005
    WA, OR, CA
    Signal has been ok here. Haven't noticed any fluctuation or loss of signal.

    Has there been a statement as to the cause of the 9 hour signal loss? Sorry, I haven't read thru the many posts.
     
  11. kenglish

    kenglish Icon

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    Oct 2, 2004
    Salt Lake...
    I think the FCC report says the satellite is within about 2/10 of a degree of it's assigned position...that should be plenty close enough for any dish other than a huge (30 foot) commercial dish.
    It takes a few days for a satellite to move that far, after getting an initial "nudge" from it's thrusters.
     
  12. Jhon69

    Jhon69 Hall Of Fame

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    ;)
     
  13. SayWhat?

    SayWhat? Know Nothing

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    Jun 6, 2009
    Gee, wonder who'll get the bill for that one?
     
  14. kenglish

    kenglish Icon

    974
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    Oct 2, 2004
    Salt Lake...
    The satellite company (SES) will probably eat any costs involved. Most services that lease space sign some form of "standard" contracts that limit the carrier's liability, unless you purchase a "protected" service where they have to get you back on-line quickly.

    The LDS Church has been using satellites for about 25 years, and has grown to an extensive 24/7 worldwide network. An early use was to broadcast the twice yearly General Conference weekends. I think it was Westar 4 that we were on many years ago. Just prior to the end of the morning session, the satellite signal was lost for about 20 seconds. Of course, people all over the world panicked. Some said it was out for several minutes.

    After we started our lunch break, and things quieted down, I called the Satellite Control Station, and asked what REALLY happened:
    They do "ranging" measurements on each bird several times a day, triangulating the signal from two or three different earth stations. That's how they know exactly where each satellite is, and how far it's moved. On that particular morning, the potentiometer (variable resistor, like a "volume control") that reads back the position of the 15-meter Control and Tracking Dish had a dirty spot on it. When they went to peak up the dish prior to making the ranging measurement, it went wild and moved off the satellite.
    That particular satellite was a spin-stabilized one, which spins like a gyro (about one turn per minute), while it's antennas "de-spin" in the opposite direction.
    This particular dish was the one that uplinks the command signal that the "de-spin" system uses to point the antennas toward the earth.....oops!

    As the satellite began to roll slightly, the signals were lost. But, as soon as it turned far enough around to see the earth again, the backup "Earth Sensor", which looks for the big, warm ground locked it back on. A few minutes later, the 15-m dish was back in service, and all was well.

    I explained it all to the big-wigs after lunch, using a Planters Peanut can (the "satellite body") and the plastic lid (the "antennas"). Told them that it was "like a kid losing sight of his mother in the grocery store...he notices she's gone, starts to cry as he turns around to look, then see's her and shuts up". Everything worked like it was supposed to.

    Everybody got a good laugh out of the explanation, shrugged their shoulders, and (presumably) went home to tell their friends what happened.

    I wonder if it was just as simple a problem as that on Ciel-2?
     
  15. Oct 1, 2011 #295 of 296
    AVJohnnie

    AVJohnnie Icon

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    Jul 27, 2004
    Since the 129 “excursion event” I’ve been noticing a lot of momentary signal drops on programming coming off the 129 bird. This manifests as a one-second-or-so clump of macro blocking and audio dropouts or garbling. This may happen two or three times in a 1 hour show. I’m wondering if my 129 dish will now need to be realigned to compensate. FWIW, My other two dishes don’t seem to be having this problem.
     
  16. Oct 3, 2011 #296 of 296
    Jim5506

    Jim5506 Hall Of Fame

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    Jun 7, 2004
    What are your signal levels on 129?

    Momentary dropouts probably are not due to misalignment especially if your signal is strong.

    Are there tree branches growing into the path of the signal?
     

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