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From: Jeff Liebermann on 9 Mar 2010 12:59
On Tue, 09 Mar 2010 07:44:01 -0500, Meat Plow wrote:

>I wish there was a repeater here.

Sorry but your 3 wish limit has been reached. Please find another
genie that grants wishes. Hint: They like their bottles rubbed.

>I would probably add a second
>receiver for inside the home so I could use a remote control.

See my rant on how to build a repeater. Just a rooftop antenna, 30dB
amplifier, and inside antenna. Since it's one way, it's easy. Wi-Fi
components can be used. I've built two of these for indoor GPS use at
1.575GHz that work fairly well (multipath causes problems). Make sure
the rooftop antenna is LHCP (left hand circular polarization), has
some gain and is pointed in the correct general direction. Straight
up is *NOT* the right way. See instructions at:
<http://www.tss-radio.com/images/sirius_externalAntenna.pdf>
Some Wi-Fi antennas will work, but you'll loose -3dB due to the
differences between LHCP and linear polarization.

The problem with terrestrial repeaters is that they belch plenty of RF
power at 2.3Ghz. That rips up 2.4GHz wi-fi communications near the
repeater. I had to relocate one wi-fi link thanks to the addition of
a new repeater.

>I've
>never had problems with reception in the garage even with 2 feet of
>snow on the roof. I'm aware of the figure 8 orbit of the two birds.
>Did some research on them and they are made by Loral. Future
>birds are going to have something more than an unfolding 36" parabolic
>for an antenna. But I think you have XM and Sirius mixed up. From what
>I've read Sirius uses the 4ghz spectrum and XM the 2 ghz. But hell I
>could be wrong, wont be the first or last.

Nope. They're both on 2.3GHz. Wikipedia has a mention of 4Ghz
somewhere, but that's wrong. You can buy aftermarket antennas that
claim to work with both, which is an important clue. I could lookup
the assignments on the FCC pages, but not now. Incidentally, the
uplink and downlink to the terrestrial repeaters are on Ku band. The
repeaters do NOT repeat the 2.3GHz transmissions to improve
reliability.

>I ditched XM back in 2005 because the signal was so
>bad unless you were out in the open. I couldn't even drive down a road
>with tall trees on each side without losing reception.

I have portable receivers for both but neither is activated. I don't
need the service for signal checking, coverage checking, and doing
installs. Besides, I only listen to my own music, 1960's acid rock,
New Age and classical, none of which I like when I tried their
programming. An iPod Touch 2G keeps me entertaining.

--
Jeff Liebermann jeffl(a)cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
From: Klaatu on 10 Mar 2010 14:03

"Meat Plow" wrote in message news:3j52v2.g7c.19.3(a)news.alt.net...
> On Tue, 09 Mar 2010 18:18:23 -0500, Meat Plowwrote:
>
>>On Tue, 09 Mar 2010 09:59:52 -0800, Jeff Liebermann
>><jeffl(a)cruzio.com>wrote:
>>
>>>On Tue, 09 Mar 2010 07:44:01 -0500, Meat Plow wrote:
>>>
>>>>I wish there was a repeater here.
>>>
>>>Sorry but your 3 wish limit has been reached. Please find another
>>>genie that grants wishes. Hint: They like their bottles rubbed.
>>>
>>>>I would probably add a second
>>>>receiver for inside the home so I could use a remote control.
>>>
>>>See my rant on how to build a repeater. Just a rooftop antenna, 30dB
>>>amplifier, and inside antenna. Since it's one way, it's easy. Wi-Fi
>>>components can be used. I've built two of these for indoor GPS use at
>>>1.575GHz that work fairly well (multipath causes problems). Make sure
>>>the rooftop antenna is LHCP (left hand circular polarization), has
>>>some gain and is pointed in the correct general direction. Straight
>>>up is *NOT* the right way. See instructions at:
>>><http://www.tss-radio.com/images/sirius_externalAntenna.pdf>
>>>Some Wi-Fi antennas will work, but you'll loose -3dB due to the
>>>differences between LHCP and linear polarization.
>>>
>>>The problem with terrestrial repeaters is that they belch plenty of RF
>>>power at 2.3Ghz. That rips up 2.4GHz wi-fi communications near the
>>>repeater. I had to relocate one wi-fi link thanks to the addition of
>>>a new repeater.
>>>
>>>>I've
>>>>never had problems with reception in the garage even with 2 feet of
>>>>snow on the roof. I'm aware of the figure 8 orbit of the two birds.
>>>>Did some research on them and they are made by Loral. Future
>>>>birds are going to have something more than an unfolding 36" parabolic
>>>>for an antenna. But I think you have XM and Sirius mixed up. From what
>>>>I've read Sirius uses the 4ghz spectrum and XM the 2 ghz. But hell I
>>>>could be wrong, wont be the first or last.
>>>
>>>Nope. They're both on 2.3GHz. Wikipedia has a mention of 4Ghz
>>>somewhere, but that's wrong. You can buy aftermarket antennas that
>>>claim to work with both, which is an important clue. I could lookup
>>>the assignments on the FCC pages, but not now. Incidentally, the
>>>uplink and downlink to the terrestrial repeaters are on Ku band. The
>>>repeaters do NOT repeat the 2.3GHz transmissions to improve
>>>reliability.
>>>
>>>>I ditched XM back in 2005 because the signal was so
>>>>bad unless you were out in the open. I couldn't even drive down a road
>>>>with tall trees on each side without losing reception.
>>>
>>>I have portable receivers for both but neither is activated. I don't
>>>need the service for signal checking, coverage checking, and doing
>>>installs. Besides, I only listen to my own music, 1960's acid rock,
>>>New Age and classical, none of which I like when I tried their
>>>programming. An iPod Touch 2G keeps me entertaining.
>>
>>I'll look into the repeater. Shouldn't cost much.
>>
>>I guess this is where klaatu leaves the thread in shame.
>
> <crickets>
>
Not at all. I just find your statement of receiving satellite radio in a
garage to be suspect.
I just don't believe its happening without a repeater.

From: William R. Walsh on 10 Mar 2010 16:16
Hi!

> <crickets>

Sure has been an interesting discussion to watch, though!

I'd not have expected it to lead this way, but it just goes to show
that you never know...

William
From: Jeff Liebermann on 10 Mar 2010 22:13
On Tue, 09 Mar 2010 18:18:23 -0500, Meat Plow wrote:

>I'll look into the repeater. Shouldn't cost much.

Not a repeater. Amplificator. See various products at:
<http://www.pixelsatradio.com/products.htm>
Yep... cheap.

Incidentally, I blundered across this photo of the FM-5 bird antenna:
<http://www.orbitcast.com/archives/a-look-at-the-sirius-fm-5-satellite-advanced-antenna-reflector.html>
Wow!

>I guess this is where klaatu leaves the thread in shame.

Nope. Such threads never end and there is never a clear winner. We're
already into the accusations and excuses. Soon, we'll degenerate into
name calling and character assassination. The idea is not to win the
discussion, but to leave evidence for later readers to misquote and
recycle. Garbage in, never out.

Marginally relevant rant on Usenet characters:
<http://802.11junk.com/jeffl/crud/genesis.txt>

--
Jeff Liebermann jeffl(a)cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
From: Mark Zenier on 11 Mar 2010 12:09
In article <eN2dnXesFoVoyAjWnZ2dnUVZ_s2dnZ2d(a)mchsi.com>,
William R. Walsh <newsgroups1(a)idontwantjunqueemail.walshcomptech.com> wrote:

>I am surprised by the presence of the Atmel tuner. Atmel is not
>the first name that comes to mind when I think "radio tuner IC"...more like
>"microcontroller" or "FPGA".

They absorbed Temic, a.k.a. Telefunken's IC operation. They
did at least a half a dozen "single chip radio" parts.

Atmel's website is where I ended up when I was looking for the IC
datasheet to repair an '80s vintage GE under the shelf digital clock
radio.

Mark Zenier mzenier(a)eskimo.com
Googleproofaddress(account:mzenier provider:eskimo domain:com)

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