In the link below there's a photo of one of the units with a ruler against it - 11" wide.
Anthony -----Original Message----- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave M Sent: Monday, October 20, 2014 10:22 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system Stu, Many thanks for the heads-up on htese units. Great deals. Can you advise the size of these units? Are they full-size 19" rack mount or the half-size units like the Z3801A? Can the REF-1 unit (the one with the GPS receiver) be operated separately from the REF-0 unit? There is a mod on Didier's site to add the 10 MHz output to the RFTGm unit at http://www.ko4bb.com/manuals/download.php?file=05)_GPS_Timing/Lucent_RFTGm_RFTGm-II-XO_GPSDO_modification_to_add_10MHz.pdf. I don't know if the mod will apply to the units on Ebay right now, but it's quite possible that it does. Cheers, Dave M Stewart Cobb wrote: > Fellow time-nuts, > > This (long) post is a review of the HP/Symmetricom Z3810A (or Z3810AS) > GPSDO system built for Lucent circa 2000. I wrote it because I looked > for more information before I bought one, and couldn't find much. > It's relevant because (as of this writing), you can buy a full system > on the usual auction site for about $150 plus shipping. For those of > you lamenting the dearth of cheap Thunderbolts, this looks like one of > the best deals going. The description of these objects does not > include "GPSDO", so time-nuts may have missed it. Search for one of > the part numbers in the subject line and you should find it. > > So what is it? It's a dual GPSDO built by HP as a reference > (Redundant Frequency and Time Generator, or RFTG) for a Lucent > cell-phone base station, built to Lucent's spec KS-24361. Internally, > it's a close cousin of a later-model Z3805A. Externally, it looks to > be almost a drop-in replacement for the earlier RFTG system built to > Lucent's spec KS-24019. That was a redundant system containing one > rubidium (LPRO, in the one I have) and one OCXO in two > almost-identical boxes. That spec went through several revisions with > slightly different nameplates and presumably slightly different > internals. You can generally find one or two examples on the auction > site (search for RFTG or KS-24019). > _______________________________________________ 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.