I read only the abstract. I have access to the database only from the
University computers,
and my comment was sent at midnight , local time, from home.
From the abstract I understood that they want to improve oscillators
by using multiple units
Yes.. You're right. But, they do mention a
Hi, Time -Nuts,
Did anyone try to deliberately allow syncronisation of two
oscillators, by , for example paralleling outputs of two 10811.
I expect to see some benefits from the usual statistics: Phase
noise divided by sqrt of 2and also decreased amplitude random
frequency
Some of Len Cutler's engineers at HP attempted to build
an ensemble of nine 10811 oscillators. It was quite
non-trivial and I'm not sure they ever completed
the project. I doubt whether just letting 10811's
self synchronize would result in satisfactory performance.
Rick Karlquist N6RK
Predrag
Predrag Dukic wrote:
Hi, Time -Nuts,
Did anyone try to deliberately allow syncronisation of two
oscillators, by , for example paralleling outputs of two 10811.
I expect to see some benefits from the usual statistics: Phase
noise divided by sqrt of 2and also decreased amplitude
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Predrag Dukic
Sent: Thursday, December 18, 2008 12:20 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Is oscillator sync always bad?
Hi, Time
-Original Message-
From: Lux, James P
Sent: Thursday, December 18, 2008 1:04 PM
To: 'Discussion of precise time and frequency measurement'
Subject: RE: [time-nuts] Is oscillator sync always bad?
Allan, et al., did a thing with 8 small oscillators in a
ring. I don't recall
Bruce,
I know the math, and possible perils. The main question is still:
Does statistics help? Is it going to be better?
If I do try, I'll use a bunch of 13 MHZ TCXO's, because I have only
3 10811, and more than 30 TCXOs.
Also with a higher number of lower quality oscs improvement
Bruce,
these articles are more or less the answer to my question.
In principle, there is obviously reduction in noise, and the main
concerns are uncoupled frequency difference and phase.
Thanks,
Predrag
At 21:48 18.12.2008, you wrote:
Pedrag
You may want to look at:
: RE: [time-nuts] Is oscillator sync always bad?
Allan, et al., did a thing with 8 small oscillators in a
ring. I don't recall if they deliberately tried to have them
mutually couple, or if it was designed to try and cancel
acceleration effects.
Found the paper..
Allan, David W
Lux,
It is one more confimation that my assumption is valid.
In fact, they comment about the potential problem of injection locking..
Allan, et al., did a thing with 8 small oscillators in a
ring. I
don't recall if they deliberately tried to have them mutually
couple, or if it
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