Use OsmocomBB as OpenBTS / airprobe clock generator

Martin Janovský martian at seznam.cz
Wed Mar 14 14:54:43 UTC 2012


Hi guys,

I'd like to build a test scenario for my thesis based on a Motorola C123 
and a PLL such as this
http://search.digikey.com/us/en/products/ICS501MLFT/800-1036-1-ND/1916104

Like this, I'd feed the multiplied clock to a USRP1 to run OpenBTS 
reliably. Would you help me choose the correct PLL if you understand the 
topic? I have little experience with circuit design.

Regards,

Martin Janovský


Dne 21.1.2011 17:47, Steve Markgraf napsal(a):
> Hi,
>
> On 11.04.2010 17:54, Steve Markgraf wrote:
>
>>> The third one is MCLK, i.e. the clock that the Calypos PLL feeds into
>>> the ARM core.
>> Ah, okay. But this one isn't accessible on all currently known phones
>> anyway.
> Just as an update on this idea: The Pirelli DP-L10 I have been playing
> around with recently exposes the MCLK pin.
>
> I've added a summary in the wiki:
>
> http://bb.osmocom.org/trac/wiki/PirelliDPL10#Phoneasclockgenerator
>
> Regards,
> Steve
>
>




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