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Old 05-24-2007, 06:53 PM #1
Geoff
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Re: Question about analog cell phones


Radium wrote:
> Hi:
>
> Why do analog cell phones use FM? Why not AM?
>
> Microwave-frequencies can be done in AM just as well as FM? Why not
> use AM?


Why ? AM is more susceptable to noise and inrterference.
>
> In order to avoid "clipping" and interference with nearby stations,
> the modulator signal should be attenuated prior to D-A conversion and
> transmission. At the receiving end, the carrier signal should be
> amplified prior to demodulation and A-D conversion.



Yer what ?

geoff




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Old 05-25-2007, 08:52 AM #2
Bob's Backfire Burrito
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Re: Question about analog cell phones



"Radium" <glucegen1@gmail.com> wrote in message
news:1180052771.131522.253240@d30g2000prg.googlegroups.com...
> On May 24, 4:53 pm, "Geoff" <g...@nospam-paf.co.nz> wrote:
>
>> Radium wrote:


Spoken like a true CB'er there Radium....
You are totally CLUELESS!
All you seem to know are buzzwords and have no idea how "radio" works.


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Old 05-25-2007, 07:16 PM #3
Karl Uppiano
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Re: Question about analog cell phones



"Bob's Backfire Burrito" <BLAMPOW!@pullmyfinger.org> wrote in message
news:qSB5i.3118$u56.1464@newssvr22.news.prodigy.net...
>
> "Radium" <glucegen1@gmail.com> wrote in message
> news:1180052771.131522.253240@d30g2000prg.googlegroups.com...
>> On May 24, 4:53 pm, "Geoff" <g...@nospam-paf.co.nz> wrote:
>>
>>> Radium wrote:

>
> Spoken like a true CB'er there Radium....
> You are totally CLUELESS!
> All you seem to know are buzzwords and have no idea how "radio" works.


The similarities between Usenet and CB are staggering.


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