[opendtv] Re: Accurian DTV STB from Radio Shack
- From: Bob Miller <bob@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 11 Oct 2005 11:54:19 -0400
It should have been 4 Mbps not 4 MBps.
Bob Miller
Ron Economos wrote:
>XM and Sirius operate in S-band, 2320 - 2332.5 for Sirius
>and 2332.5 - 2345 for XM. Here's a link with some
>technical details.
>
>http://www.coe.montana.edu/ee/rwolff/EE580/final%20projects/SDARSReport.pdf
>
>Ron
>
>Manfredi, Albert E wrote:
>
>
>
>>Bob Miller wrote:
>>
>>
>>
>>
>>
>>>Without doing the research, I think that XM
>>>and Sirius have about 4 MBps total capacity
>>>and fit 100 + radio channels in that.
>>>
>>>
>>>
>>>
>>I couldn't quickly find XM Radio or Sirius Radio
>>frequency allocations. But the original satellite
>>radio system, WorldSpace, transmits 50 channels
>>of 128 Kb/s audio in the 1,467 to 1,492 MHz
>>segment of the L-Band.
>>
>>So,
>>
>>50 * 128 is 6.4 Mb/s total
>>
>>6.4 / 25 is 0.256 b/s/Hz.
>>
>>I'm pretty sure terrestrial digital radio could
>>get by with more like 1 b/s/Hz.
>>
>>Bert
>>
>>
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