Dan - I have been following your experimentation with the surplus Lucent KS-24361 REF-0 module, to transform it into a standalone GPSDO.
The original usage of the classic Oncore UT+ GPS receiver for KS-24361 REF-1, by Symmetricom / Datum for Lucent, was deliberate. For usage at a cellular data/telecom site, the focus was on the timing and frequency discipline from the GPS satellite transmission, rather than the position or dead reckoning aspects -- used by smartphones, automobiles, and other GPS applications on the market. === A couple of comments. While I can appreciate being economical (main criteria) and selecting the NEO-6M receiver, I believe that a u-Blox timing specific module (like LEA-6T) would be more desirable in this application. In addition, the u-Blox 6-series is the trailing edge of product support (market demand dictates its continuance), while the 7 and 8-series are their current modules (largely for the cellular / mobile industry (smartphones or cell sites themselves) u-Blox 6-series Timing Application Note (using the LEA-6T) https://www.u-blox.com/sites/default/files/products/documents/Timing_AppNote_%28GPS.G6-X-11007%29.pdf IF you successfully adopt the u-Blox module to correctly "mimic" the Oncore UT+ GPS receiver command suite, THEN you open up a larger audience of "time-nuts" and Frequency Standard users (HP Z3801A frequency standard universe) as a receiver alternative. http://www.realhamradio.com/GPS_Frequency_Standard.htm These users may desire a "newer" GPS receiver that has more channels (8-channel); latest generation receiver; access to the newest GPS constellations. TAPR might be interested in sponsoring, as a kit/module, if a wider audience existed. The Heol Designs N024 receiver (France) accomplished this replacement role for the Trimble ACE II/III GPS receiver used in the Symmetricom/Datum TymServe TS2100. Their solution resolved shortcomings in the mid-1990 Trimble receiver design and giving this Symmetricom NTP server, time IRIG-B time code generator, and 10 MHz reference appliance a new lease on life (no longer a door stop). http://www.heoldesign.com/index.php?module=products&action=catalog&cat=14&id=54 w9gb Sent from iPad Air _______________________________________________ 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.