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2028 posts

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# 100282 7-Apr-2012 13:46
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Quick question ... does a dish have to be pointing exactly at Optus D1 in order to get a viewable signal?

Can a dish be pointed in the sattelite's general direction to at least get a signal (and show a TV channel), so as ensure dish, cable and TV are waorking OK before fine tuning the setup?


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1138 posts

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  # 606394 7-Apr-2012 14:30
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The dish and LNB have to be quite well aligned to receive signal. You're trying to receive a signal being broadcast from ~35786 km above the earth's surface, which doesn't leave a huge margin for error. Especially considering that there are other satellites "close by" on either side. At a guess, I would say the up/down and left/right angles need to be within a degree or two either way; a bit more lenience on the LNB skew.

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  # 606400 7-Apr-2012 14:45
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Hi, the -3dB response of the dish is around 3deg wide, therefore assuming you can suffer a 4-5dB reduction and still get service it needs to be within 2deg of correct alignment.

Also the thing you are aiming for with this 3deg wide view is the size of a mini bus and its 33,500m away, so you need to be right on it.



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  # 606421 7-Apr-2012 16:01
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Thanks guys.


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