Why not consider a more recent current UBlox module? e.g. the M8TÂ https://www.u-blox.com/en/product/neolea-m8t-series
A quick internet search will find several suppliers of ready made boards/modules... On 22/01/2018 15:38, Paride Legovini via time-nuts wrote: > Dear fellow nuts, > > I plan to build a decent GPS/GNSS-based Stratum 1 NTP server, and I'm > looking for a good and possibly affordable timing GPS receiver. > > As far as I can tell there are a few common options. One is the Trimble > Resolution T (or SMT), that should be good and proven. The major > annoyance is converting the 3.3V TTL serial logic-level to RS232, but > should be doable with a MAX3232 and a few capacitors. > > Another option is this UBLOX LEA-5T: > > https://www.ebay.it/itm/291769145465 > > The seller advertises an RS232 output pin, but I'm not sure it's > actually available, and I'd need at least lines, one for the NMEA > strings and one for the 1PPS signal. So, even if a RS232 TX pin is > actually there, it is probably not enough to build a good reference > clock, and I'd still need to convert some TTL levels to RS232... > > Does anybody have experience with this receiver? > How does it compare to the Resolution T/SMT? > > Another option is the Trimble Thunderbolt. This seems to do exactly what > I need, but it costs at least ten times more than the other modules. > Beside coming with a ready to use RS232 port and a nice case, does it > have other advantages? > > Am I overlooking something or missing interesting options? > > Cheers, > > Paride IZ3SUS > _______________________________________________ > 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. > -- Stephen Tompsett _______________________________________________ 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.