Hi A couple of differences:
1) The Lucent is a two box system, the GPSTM is a single box 2) The GPSTM is 1/2 of an operating pair. The Lucent ($150 version) is a full pair. 3) Both units are “fixed coefficient” boxes. Neither one can be modified (the way a T Bolt can). 4) The GPSTM works with Lady Heather. The Lucent works (sort of) with Z38x 5) The ADEV (stability) of the Lucent is better than the GPSTM. I posted plots of both about a month ago. 6) The Lucent’s are “new in box / old stock”. The GPSTM’s are surplus / salvage parts. 7) The GPSTM has a “pulse every 2 seconds” output. The Lucent puts out a PPS. The pps is much more useful. A few similarities: 1) The samples of both devices I have seen have worked well. My GPSTM’s came from a US seller. 2) Both units were designed for cell tower service. Neither one is designed as a frequency standard. 3) Both run off an external DC supply. 4) The GPSTM has a bunch of fairly useless outputs at cell phone data rates. The Lucent has a 15 MHz output. 5) Both boxes have a 10 MHz output. Of the two, at the moment, the Lucent is the better buy. Bob > On Dec 12, 2014, at 6:20 PM, Dave Daniel <kc0...@gmail.com> wrote: > > All, > > As a relative newcomer to this list, I have been reading the posts concerning > GPSDOs. I have what I hope is a simple question. > > For a newcomer to this field, which GPSDO would be better to purchase as a > first-time acquisition: > > - This "LUCENT/SYMMETRICOM Z3810AS, KS24361 L101/L102, HP-KIO OEM GPSDO > TIMING SYSTEM", eBay item 321560316836, or > > - This "Nortel Trimble NTBW50AA GPSTM 10MHz Oscillator GPSDO + Antenna &Acc. > Thunderbolt", eBay item 301434579384 > > I am looking for a reference for my lab. Experimentation with GPSDOs will > come later. > > Thanks > DaveD > _______________________________________________ > 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.
