Hi

With GSM you *may* have 10 ppb, you may get a lot better. With LTE you *should* 
get better, but you don't always. That was the downfall of the Symmetricom 
2700. You are very much at the mercy of the cellphone outfit. They may or may 
not be paying attention. 

Bob

On Mar 10, 2013, at 8:37 PM, gary <[email protected]> wrote:

> I haven't researched this yet, but the SDR crowd is using GSM and LTE for 
> tuning their sample clocks.
> 
>> https://github.com/steve-m/kalibrate-rtl
>> https://github.com/Evrytania/LTE-Cell-Scanner
> 
> 
> I have no idea what kind of accuracy you can get from a tower.
> 
> 
> 
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