My understanding from someone who has purchased one recently is that the frequency offset error was indeed just a bug, and that it's now fixed. I've added a note to the end of my page at http://www.ke5fx.com/gpscomp.htm to that effect.
If the bug has been fixed (or the algorithm replaced), and if you get one with a good MV89A OCXO, the BG7TBL GPSDO has the potential for decent performance. In principle all of the right ingredients are there... it's just a question of whether the software is making the most of them. -- john, KE5FX Miles Design LLC > -----Original Message----- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Lars > Walenius > Sent: Monday, March 14, 2016 12:41 PM > To: time-nuts@febo.com > Subject: Re: [time-nuts] BG7TBL GPS Disciplined Source > > Hi > > If you are lucky the MV89 might be a very good OCXO and U-Blox makes very > good GPS modules. The NEO-6M is not the best as it isn´t a timing module. But > in your GPSDO the GPS module with an external antenna is not the limiting > factor but more the controller and it´s limited resolution on the time > measurement that is larger than the ripple from the GPS module. Also the > software with FLL seems to limit the performance a lot. But with the long time > constant the frequency accuracy, even with the offset due to the FLL, will be > quite good. > > U-blox own software uCenter have worked well for me. > > Lars _______________________________________________ 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.
