[time-nuts] u-blox timing modules

Bob Camp kb8tq at n1k.org
Wed Dec 21 20:30:10 EST 2016


Hi

Ummm…. because you need a 30.72 MHz reference in a 4G base station rather than the 
TCXO that normally is in the uBlox modules. You can then “carry” the sawtooth into the 
SDR part of the basestation without a lot of muss and fuss. 

Bob

> On Dec 21, 2016, at 5:48 PM, Bob Stewart <bob at evoria.net> wrote:
> 
> Hi John,
> Could you tell me why one would use choose an LEA-M8F over an LEA-M8T?
> Bob - AE6RV
>  -----------------------------------------------------------------
> AE6RV.com
> 
> GFS GPSDO list:
> groups.yahoo.com/neo/groups/GFS-GPSDOs/info
> 
>      From: John Haine <john.haine at haine-online.net>
> To: time-nuts at febo.com 
> Sent: Wednesday, December 21, 2016 11:34 AM
> Subject: [time-nuts] u-blox timing modules
> 
> It's worth noting, in case people don't know, that u-blox have a 
> specific chip & module (the latter being the LEA-M8F) for precision 
> timing, developed for the LTE (4G) base station market. This disciplines 
> a low phase noise 30.72 MHz reference to received satellite signals, 
> GPS/GLONASS/BeiDou.  (30.72 MHz is the standard LTE sampling rate.)
> 
> John.
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