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Now that the Leaves are down

2

2004RedSox

Guest
Now that the Leaves are down in the Northeast (Boston area), I seem to be getting less signal cut off driving on tree lined streets. Am I imagining things or does the thicker tree cover really impead Sirius signal? Is this another reason to appreciate the change of season?
 
> Now that the Leaves are down in the Northeast (Boston area),
> I seem to be getting less signal cut off driving on tree
> lined streets. Am I imagining things or does the thicker
> tree cover really impead Sirius signal? Is this another
> reason to appreciate the change of season?
>
I get better in-car reception in certain areas once the leaves drop off the trees. This is my second year with Sirius, and the results seem to be consistent. I'm in the Philly metro area.
 
> > Now that the Leaves are down in the Northeast (Boston
> area),
> > I seem to be getting less signal cut off driving on tree
> > lined streets. Am I imagining things or does the thicker
> > tree cover really impead Sirius signal? Is this another
> > reason to appreciate the change of season?
> >
> I get better in-car reception in certain areas once the
> leaves drop off the trees. This is my second year with
> Sirius, and the results seem to be consistent. I'm in the
> Philly metro area.
>
Yes. Better reception with no leaves. Philly metro area too.
 
Re: Speaking of Boston's Sirius reception

I've been on the Pike through Newton twice this week. The signal cuts out when traveling under overpasses. Overall, the signal cuts out more than it usually does when I'm traveling through Newton/Wellesley.

This is strange, because the reception is usually impeccable. I don't even lose it in the Storrow inbound tunnel.
 
Foliage certainly has an effect on SDARS signals -- over 2 GHZ, thats near those of your microwave oven. Big difference on narrow tree-lined 2-lane roads -- one of the extremely few benefits winter provides. Since foliage even attenuates 800 MHz-band cell phones (even the cell companies include foliage in the fine print in their variations in coverage info) and yet lower UHF TV frequencies, it's obvious it would degrade XM & Sirius reception.
 
> Foliage certainly has an effect on SDARS signals -- over 2
> GHZ, thats near those of your microwave oven. Big
> difference on narrow tree-lined 2-lane roads -- one of the
> extremely few benefits winter provides. Since foliage even
> attenuates 800 MHz-band cell phones (even the cell companies
> include foliage in the fine print in their variations in
> coverage info) and yet lower UHF TV frequencies, it's
> obvious it would degrade XM & Sirius reception.
>

I was hoping someone would address this technically... Think of it this way, how does normal radio behave when something’s in the way? Exactly, the higher in frequency you go, the more line of sight radio waves become.

A cell example. People have often asked which cell phone company is the best. Ok, well there are many factors that can determine what ranks a cell phone company as "the best", but if we choose to compare based on reception lets use this example. For our example, let's pretend we have 2 different cell towers (Verizon and Cingular) 5 miles away for the location you're standing and you walk inside a building. A Verizon CDMA 800Mhz cell phone will receive more RF energy from its tower then the Cingular 1900Mhz (1.9Ghz) GSM phone. More RF energy (most of the time) means better reception. The lower frequency has larger wavelengths and can penetrate the walls of a building better.

Ever wonder why AM reception goes so much further then FM radio stations. In the simplest of terms, the same idea applies. Not AM, not FM, it’s XM (only joking).

Hope this helps…

-RadioEnginerd<P ID="signature">______________
If you put your mind to it, you can accomplish anything...</P>
 
>
> A cell example.
>

Not exactly.
Lower frequencies are attenuated less by physical matter, but:
Higher frequencies bounce around and find their way into places that neither can actually penetrate. Through a tunnel, in a parking garage, the lower level of an airport, in a shielded office building, a safe with a small opening, shorter wavelengths need less of an opening through which to crawl. Using your example of the broadcast radio bands, the FM stations at 100MHz will always outperform the AM's at 1MHz in the aforementioned locations. Aside from the fact that these tiny antennae on todays phones have much more gain at the PCS bands than at the cellular bands, 800Mhz might work better far away from the cell site, but not necessarily close in. <P ID="signature">______________
<a target="_blank" href=http://www.xstreamer.net/xinfo/v2/xstreamer.8.DC0000.ai4i.png>Proud 2 B a pioneering satellite radio subs¢riber
Ai4i is always on the trailing edge of technology</a>
</P>
 
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