Hi
> On Nov 14, 2014, at 2:55 PM, Perry Sandeen via time-nuts <[email protected]> > wrote: > > List, > > Wrote [Snip] 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’s good to know. I only have the older style units. It > will be interesting see how well the older units can be *tweeked*. > > [Snip] The 15 MHz buffer appears to be quiet and puts out a > lot of power. > > Power yes, but the waveform is highly distorted. Not on the units I have. It’s a pretty good looking signal on them. What are you seeing? > > [Snip] 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 - > > That is the idea. Hack (in my case) the 10 MHz from the oscillator into the > 15 MHz > circuit. There are two i5 MHz filters to > be bypassed or replaced. >From what I’ve seen, the circuits in the boxes have almost no resemblance at >all to each other. A solution for Efratom / Datum designed boxes would not be >a solution for the HP designed \ boxes. . > > The Modifying The Lucent Rubidium article uses just two > resistors to reduce overdriving and a surplus ethernet 10 MHz to reduce spurs. > > I don’t know how applicable it would be to the newer boxes\\ They most certainly have a 5 MHz output OCXO in the HP designed boxes. A quick probe with a scope is all it takes to verify this. The Z3810/11/12 is a 5 MHz based design. Bob > but putting a load resistor on the output and using a scope should give one a > good idea if a mod is needed. > > Regards, > > Perrier > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
