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Old 11-29-2006, 08:53 PM   #1
JKolstad
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Default Alternatives to personal repeaters

I got to thinking... just why do people want personal repeaters for Sirius anyway? Presumably the answer is... they get a poor signal inside their homes (or wherever), but still want to receive their Sirius broadcasts... right?

If so... it occurs to me... now that the SCH-1 has been released, one could build a wireless interface to it so that the SCH-1's output would be re-transmitted (at 900MHz or 2.4GHz or some other legal, unlicensed band) to a control box that would simply output the audio signal as well as have a control link back to the SCH-1 to control the channel tuning, obtain artist/title information, etc.

It seems to me that that would be a workable solution for almost everyone after a personal repeater, and it's doable with existing knowledge and technology for reasonable costs (the control interface to the SCH-1 is pretty well known). What do you think?

Instead of an SCH-1, perhaps a Stilleto could be used so that one wouldn't have to have multiple subscriptions...
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Old 11-30-2006, 07:50 AM   #2
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That would work, but it doesn't do much for the zillions of subscribers who now have other types of Sirius receivers. They'd have to buy a SCH-1 and the 'wireless' adapter you propose.

The Delphi XM repeater does use 900mhz. It doesn't work the way the terrestrial repeaters do.

You place a remote antenna where you get a good signal. The repeater converts the 2.3 Ghz satellite signal to a 900mhz signal. There is a special receiver that comes with the the repeater. You plug it into your Sirius unit. This receiver converts the 900mhz signal back to 2.3 Ghz. The 'repeater' is essentially a cordless antenna system. It saves you running a long extension.

If only they could make one for Sirius... Whoever does will be laughing all the way to the bank

Last edited by jwt873; 11-30-2006 at 07:53 AM..
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Old 11-30-2006, 10:06 PM   #3
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Hi JWT,

Quote:
Originally Posted by jwt873
That would work, but it doesn't do much for the zillions of subscribers who now have other types of Sirius receivers. They'd have to buy a SCH-1 and the 'wireless' adapter you propose.
In my mind I didn't think there were *really* that many people who ferried their Sirius receivers from a car dock to a home dock, but perhaps I sorely understimate that number.

Quote:
The Delphi XM repeater does use 900mhz. It doesn't work the way the terrestrial repeaters do.
Ah, thanks for the link & explanation. I didn't realize the XM repeaters required a "receiver" station that you connect to the XM radio via the antenna input; I was thinking all XM receivers had the 900MHz receiver hardware built-in.

It definitely seems as though you could build a Sirius repeater very similar to the XM one, then. (In that other thread about repeaters, it became clear that building your own repeater using the same approach the Sirius terrestial repeaters use wouldn't be cheap -- demodulating the satellite signal and then re-modulating. I'm willing to bet the hardware the Sirius repeaters use there just for the format conversion is many thousands of dollars.)

---Joel
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Old 12-01-2006, 10:03 AM   #4
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Quote:
Originally Posted by JKolstad
In my mind I didn't think there were *really* that many people who ferried their Sirius receivers from a car dock to a home dock, but perhaps I sorely understimate that number.
Of course you could be right... In my case, I carry one unit between my house, the boombox in my garage, two cars and a truck. I always have 'lugging' on my mind
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