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Discussion of precise time and frequency measurement

Re: [time-nuts] True Position GPSDP + Rb X72

ewkehren

Sun, Sep 24, 2017 5:06 AM

Sent from my Galaxy Tab® A
-------- Original message --------From: Hal Murray hmurray@megapathdsl.net Date: 9/23/17 9:39 PM (GMT-05:00) To: Discussion of precise time and frequency measurement time-nuts@febo.com Cc: hmurray@megapathdsl.net Subject: Re: [time-nuts] True Position GPSDP + Rb X72

kb8tq@n1k.org said:

If the main use is feeding test gear (and not direct synthesis) an Rb may do
pretty well. Most instruments assume a dirty reference signal and clean it
up internally.

What's the bandwidth on the typical cleanup PLL? How well does that match
the noise from a Rb?

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Starting with a 10 second clean up loop for a FEI 5680/GPSDO to now 600 Seconds using Wenzel's j circuit for the Tbolt we have a variety of boards. I am presently out of country but when back will gladly attach some board designs, material cost is minimal if there is interest.Bert Kehren Sent from my Galaxy Tab® A -------- Original message --------From: Hal Murray <hmurray@megapathdsl.net> Date: 9/23/17 9:39 PM (GMT-05:00) To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: hmurray@megapathdsl.net Subject: Re: [time-nuts] True Position GPSDP + Rb X72 kb8tq@n1k.org said: > If the main use is feeding test gear (and not direct synthesis) an Rb may do > pretty well. Most instruments assume a dirty reference signal and clean it > up internally. What's the bandwidth on the typical cleanup PLL? How well does that match the noise from a Rb? -- These are my opinions. I hate spam. _______________________________________________ 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.

Attila Kinali

Sat, Sep 30, 2017 12:32 AM

On Sun, 24 Sep 2017 01:06:36 -0400
ewkehren via time-nuts time-nuts@febo.com wrote:

Starting with a 10 second clean up loop for a FEI 5680/GPSDO to now 600
Seconds using Wenzel's j circuit for the Tbolt we have a variety of boards.

Which one is Wenzel's j circuit? Google does not seem to be able to find it.
And going through relevant circuits on wenzel.com didnt reveal any j circuit.

It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson

On Sun, 24 Sep 2017 01:06:36 -0400 ewkehren via time-nuts <time-nuts@febo.com> wrote: > Starting with a 10 second clean up loop for a FEI 5680/GPSDO to now 600 > Seconds using Wenzel's j circuit for the Tbolt we have a variety of boards. Which one is Wenzel's j circuit? Google does not seem to be able to find it. And going through relevant circuits on wenzel.com didnt reveal any j circuit. -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson