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.

  From: John Haine <john.haine@haine-online.net>

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@haine-online.net> To: time-nuts@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. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

  From: John Haine <john.haine@haine-online.net>

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@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@haine-online.net> > To: time-nuts@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. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

  From: John Haine <john.haine@haine-online.net>

The LEA-M8F is a complete GPSDO in module, the TCXO is EFC steered, no sawtooth needed. On Wed, Dec 21, 2016 at 8:30 PM, Bob Camp <kb8tq@n1k.org> wrote: > 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@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@haine-online.net> > > To: time-nuts@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. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. >