Proposed 5G spectrum allocation will kill DTV and Dish Network

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Edgar
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Re: Proposed 5G spectrum allocation will kill DTV and Dish Network

Post by Edgar » Sat Nov 21, 2020 8:12 pm

Sorry, just not true. The starlink antenna mechanically scans a large part of the sky to find the strongest satellite beacons and initially points in that direct. It can be northerly or southerly. If you don't believe me, just put an obstacle in front of your starlink antenna and it will mechanical move and point to a new direction. It then uses its electronic phasing system to track and hold each overhead satellite in its orbit for 30 degrees (will be upgraded to 45 degrees in the future). RF energy is coming from many directions and will certainly cause interference problems for other services using the ku band spectrum. In my opinion, this is a big reason AT&T is getting rid of DTV.

Think about all the 4G (out of band) interference problems experienced by c band ground stations. There were only a few thousand of them scattered across the country, tracking a few dozen geo stationary sats and a single 4G tower a couple of miles away. Starlink exponentially multiplies the problem. The RF is in the same band, it is coming from tens of thousands of satellites in low earth orbit, from multiple directions and there are tens of millions of potential interference ground targets (i.e. dtv/dish/bell/shaw/claro/orby).

Eugene
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Re: Proposed 5G spectrum allocation will kill DTV and Dish Network

Post by Eugene » Sat Nov 21, 2020 9:45 pm

How will Starlink prevent geostationary satellite interference?

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Re: Proposed 5G spectrum allocation will kill DTV and Dish Network

Post by fatso » Sat Nov 21, 2020 11:07 pm

Why are these companies all trying to use the same frequencies? If 12 ghz is taken, why not use 14 ghz or something else? :scratchingmyhead:
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Re: Proposed 5G spectrum allocation will kill DTV and Dish Network

Post by dishcrank » Sun Dec 20, 2020 2:18 am

fatso wrote:
Sat Nov 21, 2020 11:07 pm
Why are these companies all trying to use the same frequencies? If 12 ghz is taken, why not use 14 ghz or something else? :scratchingmyhead:
Good question, fatso. SpaceX is already using the 14 GHz band for terminal uplink transmissions.

DISH recently wrote a letter to the FCC stating that SpaceX 12 GHz transmission could imperil DBS transmissions. This is for real.


Last bumped by Anonymous on Sun Dec 20, 2020 2:18 am.

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