Hi The people selling them do indeed stand behind the product. My only concern is making sure there really is a problem before something gets swapped out.
The best thing (by far) is to get a second unit and compare their outputs. Bob > On Nov 14, 2014, at 9:17 AM, paul swed <paulsw...@gmail.com> wrote: > > Thanks everyone. My concern is did I need to reach out and get an exchange > before the 30 days is up. I sense ASI the vendor is actually a pretty good > company and will do the right thing. > Regards > Paul > WB8TSL > > On Fri, Nov 14, 2014 at 7:35 AM, Bob Camp <kb...@n1k.org> wrote: > >> Hi >> >> >> That OCXO is doing very well. >> >> If you look at the plot, it’s doing a few LSB’s on the DAC over the time >> period. That’s good performance. >> >> Bob >> >>> On Nov 13, 2014, at 9:17 PM, paul swed <paulsw...@gmail.com> wrote: >>> >>> Bob the actual pictures and files are large so here is the left screen >> and >>> right screen from the z3811 program. Pretty easy to guess whats in the >>> middle. >>> Lots of noise on the ti/pps and you can see EFC is rising all the time. >>> I will say in the past it had been a steady rise now there is a wave that >>> might mean its slowing down a bit. >>> But this all looks rattier then I would believe. >>> Regards >>> Paul >>> WB8TSL >>> >>> >>> On Thu, Nov 13, 2014 at 5:43 PM, Bob Camp <kb...@n1k.org> wrote: >>> >>>> Hi >>>> >>>> How much is your unit moving? >>>> >>>> Bob >>>> >>>>> On Nov 13, 2014, at 1:50 PM, paul swed <paulsw...@gmail.com> wrote: >>>>> >>>>> On the older units that used a RB to control an Xtal. They created a >> mix >>>> of >>>>> 5 Mhz +10 Mhz and that produced 15 out that hit an amplifier to drive a >>>> 12 >>>>> way splitter. >>>>> I think I reverse engineered the circuit. Its on paper and filed. Oh >> that >>>>> ends this discussion. >>>>> Anyhow it was not hard to figure out. >>>>> I am still baking my Lucent in so want to see if it settles. >>>>> There is just the barest of hints it may be. >>>>> >>>>> So do not want to power down to explore. Happy to dig in if I don't >> have >>>> to >>>>> return the unit. >>>>> >>>>> Regards >>>>> Paul >>>>> WB8TSL >>>>> >>>>> On Wed, Nov 12, 2014 at 7:21 PM, Bob Camp <kb...@n1k.org> wrote: >>>>> >>>>>> Hi >>>>>> >>>>>> The chain in the Z3810 / 3811 / 3812 Lucent boxes is *much* different >>>> than >>>>>> the setup in the earlier parts. The phase noise and ADEV on the >> Z3810’s >>>> is >>>>>> better than what you got on the earlier versions. That makes keeping >> the >>>>>> noise down in whatever mod you do more important. The existing 10 MHz >>>>>> output on the Z3810 setup is a real good example of how a seemingly >>>> simple >>>>>> thing can add a lot of phase noise and even mess up ADEV. >>>>>> >>>>>> I don’t think the 15 MHz is used for much of anything in the Z3810. >> That >>>>>> could be wrong, but I can’t see where it is needed based on poking >>>> around a >>>>>> little. The 15 MHz buffer appears to be quiet and puts out a lot of >>>> power. >>>>>> Using it for 10 MHz would give you a *lot* of 10 MHz signal to play >>>> with. >>>>>> IF the mods are simple it’s an attractive solution. If it involves >>>> swapping >>>>>> out 30 parts - not so much. >>>>>> >>>>>> Bob >>>>>> >>>>>>> On Nov 12, 2014, at 5:50 PM, Perry Sandeen via time-nuts < >>>>>> time-nuts@febo.com> wrote: >>>>>>> >>>>>>> Wrote: At some point we will get into hacking the main board >>>>>>> to switch from 15 MHz to 10 MHz. >>>>>>> >>>>>>> One doesn’t have to that if one uses the two IC divide by >>>>>>> 1.5 circuit I offered the list. I specifically found it so I didn’t >>>> have >>>>>> to >>>>>>> hack the innards. >>>>>>> >>>>>>> Wrote: The great news is the oscillator is 5 Mhz. >>>>>>> >>>>>>> Don’t bet the rent on that. My early units have 10 MHZ Datum >>>>>>> oscillators. >>>>>>> >>>>>>> Bob’s point about getting the GPSDO’s if all cost the same >>>>>>> is a good point. >>>>>>> >>>>>>> Another point. At least on the older units I have: GPSDO, >>>>>>> Rubidium, and Crystal oscillator, the output circuitry after the 15 >> MHz >>>>>>> conversion takes place is the same. So if one hacks the 10 Mhz into >> the >>>>>> chain, >>>>>>> all one has to do is remove or bypass the 15 MHz filter before the >>>>>> output. >>>>>>> >>>>>>> Even if you don’t have the rubidium unit but have either/or >>>>>>> GPDO or Crystal oscillator email me off list for the rubidium >> schematic >>>>>> as >>>>>>> after the logic chips they use the same circuit. >>>>>>> >>>>>>> Regards, >>>>>>> >>>>>>> Perrier >>>>>>> _______________________________________________ >>>>>>> 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. >>>> >>>> _______________________________________________ >>>> 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. >>>> >>> <lucent ti left screen.GIF><Lucent ti right >> side.GIF>_______________________________________________ >>> 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. _______________________________________________ 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.