Off by an order of magnitude. 2.5GHz abd 5GHz.

On November 8, 2014 3:00:25 AM CET, Amir Taaki <genjix@???> wrote:
>So wireless operates on 2500 ghz (or 5000 ghz) but cellphone GSM
>operates on much lower frequency (or larger wavelength), hence travels
>greater distance.
>
>I'm seeing each country has a different GSM frequency, some countries
>have something like:
>

>  United Kingdom    GSM 900/1800

>
>What does that mean? Do cellphones use both frequencies or hop between
>them?
>
>What's the typical range of a directional antenna (say 23 dBm) with
>line
>of sight?
>
>I found also this really good tutorial on the internet:
>
>http://www.rtl-sdr.com/rtl-sdr-tutorial-analyzing-gsm-with-airprobe-and-wireshark/
>
>linux rocks!
>
>On 11/08/2014 01:31 AM, Amir Taaki wrote:
>> Hi!
>>
>> How can I see mobile phone signals on Linux? I have a yagi and omni
>> antennas for wifi signals... Can I also use this for cell phone
>signals?
>>
>> I am interested to learn more. Especially about triangulation of
>signals
>> for detecting cell phone locations.
>>
>> Thanks.
>> (the previous topic was very informative and instructive... thank you
>> everyone who responded. The EFF link was very good and the open
>hardware
>> stuff is cool too)
>>
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>>
>
>
>
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