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.