Re: [Openbts-discuss] USRP 52MHz Clock Modification

[Andy F. <and...@gm...>]

  Hi Eli,

I believe it was a custom-made oscillator. I had to pay first and picked 
it up from the shop after a few days.

On the oscillator, it was labeled "TCXO 52.000MHz" and nothing else.

Andy


On 9/7/2010 3:22 PM, Eli@Yahoo wrote:
> Andy,
>
> Can you please send me the exact part number of the clock?
>
> Thanks
> Eli
>
>
>
> On 7 בספט 2010, at 05:46, Andy Fung <and...@gm... 
> <mailto:and...@gm...>> wrote:
>
>>
>> The following is what I did to modify my USRP to run on a 52MHz clock.
>>
>> 1. Bought a 52MHz Crystal Oscillator (see 
>> http://www.flickr.com/photos/12948468@N00/4965450513) from a 
>> component supermarket.
>> 2. Followed the instructions from this gnuradio.org 
>> <http://gnuradio.org> webpage 
>> (http://gnuradio.org/redmine/wiki/gnuradio/OpenBTSClockModifications)
>> 3. Glued the 52MHz Crystal Oscillator on the USRP mainboard.
>> 4. Soldered the red wire (Vcc) and connected it to the 3.3V power 
>> source.
>> 5. Soldered the black wire (ground) and connected it to the ground 
>> point. I chose one of the ground pin of J2002.
>> 6. Soldered the white wire (52MHz) and connected it the C927. See 
>> http://www.flickr.com/photos/12948468@N00/4966048066  for the finish 
>> look.
>>
>> I am running OpenBTS2.6 and gnuradio 3.2.2. So far I tested Nokia 
>> E61, E61i, E71, E72, some older Nokia, some Window Mobiles ....... 
>> etc. I would say my test covered GSM baseband chipsets from TI, NXP, 
>> Qualcomm and MTK. So far, I do not see too much problem.
>>
>> Andy
>>
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