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Originally Posted by rainman
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Originally Posted by keebs
i noticed in your descriptions of different dish sizes you have for sale you state that this dish is good for this satellite and that satellite and most satellites in clarke belt or on ku? what is preventing me from getting all the satellites instead of just most of them? is it the dish size? im wanted a 90cm.
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with a 90 cm dish you can get all of the ku sats in your line of site. It is to small to get the c band sats. 
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But not the ones beamed elsewhere. Ie need to look at footprints.
Also, if the modulation modes change from QPSK to 8PSK, and even higher orders, the 90 CM may not be big enough to collect the high quality signal required, even on KU.
Basically, there are a lot of satellites up there. To see any of them they have to be line of sight, but then they are on different bands, Ku, Ka C-band, L-band, etc, each requirring different LNBs, and some requiring different receivers. Then some sats have transponders aimed at different continents or different parts of the same continent, so you can't see them. Then the various transponders use different modes, like analog, QPSK, 8PSK, etc, and use a variety of formats like DVB, DCII, DSS, etc, etc, etc. Plus some are sending video, others are sending data.
With the consumer FTA equipment sold here and elsewhere, we can't see ALL the sats, and can't see ALL the signals on those sats we can see. But with the 90 CM you can see all the FTA QPSK beamed your way, and with additional receivers might pick up a few other things, like analog and DCII.