The price is very high (for me) but on the usual auction site again you can find an FTS1050 too: 150714877944
On Thu, Dec 8, 2011 at 2:34 PM, John Ackermann N8UR <j...@febo.com> wrote: > Hi Mark -- > > This may be challenging. A good FTS-1050 can be very, very good indeed. > I have one that seems to have a wideband noise floor problem (about 20dB > worse than it should be) but has stability below 3e12 out to 200K seconds > -- it's just quite amazing. > > Plots attached, with an HP 5065A Rb as the reference. The short term > stability (below about 100 seconds) is limited by the reference, and that's > the hard part; a maser is about the only thing that can give you low short > term and low term stability. > > Lacking a maser, the best strategy may be to use two references for > different tau ranges -- a very good OCXO for short term, and then an Rb for > long term. Combine the plots and you'll probably see the point where the > lines intersect. > > John > ---- > > On 12/7/2011 9:41 PM, Mark Spencer wrote: > >> Greetings: >> >> I'm contemplating starting a search on the "typical auction sites" for a >> high end OCXO (or possibly a high end Rb) that would be suitable for >> characterizing the performance of an FTS 1050. From time to time I've >> seen ADEV figures of in the 10E-13 range (at a typical Tau of 100 seconds) >> when comparing the FTS 1050 in question to one of my GPSDO's and one of my >> Rb's. >> >> At this point I'm contemplating looking for: >> >> Another FTS 1050 >> Various Datum / FTS stand alone OCXO's >> An Oscilloquartz BVA OCXO >> A Sulzer OCXO >> Maybe an HP 5065 >> >> (I've already assembled a modest collection of half a dozen various >> 10811's and don't really want to buy any more at this point.) >> >> Essentially I'm looking for something with a reasonable likely hood of >> consistently having an ADEV in the 13's at Taus of 100 seconds or so. >> I'm thinking that another FTS 1050 is probably the most likely >> alternative but I'm trying to keep an open mind to other options. I'm not >> really interested in a Cesium standard but if anyone has any other >> suggestions of products I could look for (other than a H maser (: ) >> comments on or off list would be appreciated. >> >> >> Regards Mark Spencer >> >> >> >> >> >> _______________________________________________ >> 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. > _______________________________________________ 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.