Re: [time-nuts] IEEE Spectrum Magazine interviews one of our own...

[cook michael]

Le 25/05/2011 04:00, Tom Holmes a écrit :


Steven Cherry is exaggerating when he says " most systems go down for 
planned maintenance instead of trying to deal with leap seconds in real 
time."
  As someone who has been supporting major industrial, banking, airline 
systems for the last 30 years, I remember NO down time, or outage due to 
leap second insertion. In fact, I don't know of any  commercial 
applications, that care about it. Most systems administrators that I had 
contact with didn't know that th leap seconds existed, and did not 
configure, check or update their ntp servers  to enable them to be taken 
into account.  There were of course outages and errors due to clock 
updates, but they were all attributable to operators trying to change 
the clocks by large increments manualy or bad ntp configurations, such 
as allowing large step changes instead of slewing .  We have up till now 
been faced only with positive leap second insertion, but negative 
updates are also possible. Testing I have done on unix based operating 
systems show no adverse effects to negative leap second insertion either.



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Re: [time-nuts] smallest rubidium

[Dr. David Kirkby]

On 05/25/11 04:49 AM, Robert Darlington wrote:

I actually asked in jest, thinking there was no such beast and that it was a
typo.


No, just a joke on my part. I don't know if Apple think it impresses people to 
know messages were sent from iPads or iPhones, but it seems to be how many are 
set up. I would hope one could disable it, but since I own neither I've never 
tried.



I'm an old Sun guy, apparently too old to know about the new stuff.


OK. I like the old Sun equipment. Most was built to a very high standard - far 
better than modern PCs.



Looks like an expensive PC.


It basically is, and it's not built to the same high standard as the older SPARC 
hardware, though it is pretty decent. Mine is pretty well specified


 * 3.33 GHz quad core Intel Xeon CPU
 * 12 GB RAM
 * 2 x 2 TB disks (mirrored)
 * 2 x 500 GB disks (mirrored)
 * NVIDIA Quadro FX 3800 graphics accelerator card

I got the machine after some of my Sun hardware was damaged due to lightning. My 
insurers paid for it.


I also have a range of Sun SPARC hardware here
 * Sun Blade 2000
 * 2 x Sun Blade 1000 (one is not complete, so basically useless)
 * 1 x Netra T1.
 * 1 x Sun Ultra 60.

The Sun Blade 2000 has a blown ethernet port on the motherboard, and is an 
insurance writeoff, after I got hit with lightning. Since the insurers left me 
with the machine and did not collect it, I stuck in a Gbit Ethernet card. But I 
don't use it much. I have access to a Sun T5240 if I need it, but that thing is 
really slow, despite it has 16 cores, 128 hardware threads and 32 GB RAM. To get 
any performance out of that machine you need to keep all the threads busy, which 
I gather is possible if it's running as a web server or database, but is useless 
for most scientific applications.


Dave


On Tue, May 24, 2011 at 9:33 PM, Dr. David Kirkby
wrote:


On 05/25/11 03:29 AM, Robert Darlington wrote:


What's an Ultra 27?

-Bob



My posted ended in "Sent from my Sun Ultra 27", in response to someone's
post which had at the bottom "Sent from my iPad".

I'm sure if you are interested, it would not take take long to find out
what a "Sun Ultra 27" is.

Dave




On Tue, May 24, 2011 at 11:47 AM, Dr. David Kirkby
wrote:

  On 05/24/11 06:51 AM, Said Jackson wrote:


  How about a GPSDO in 1 x 1 x 0.5 inch footprint?


Check out the new MtronPTI M9107 and M9107 GPSDOs.

Check out the press release about these on our Jackson Labs Tech website
for more info..

Better than 4E-013 over 100K seconds typically, beats most RBs.

Said



I don't want to rely on an external reference. I want to keep the unit
self-contained. Once I determine the amount of space available, I'll look
to
see if its practical to fit an OCXO.

I don't need huge accuracy with this. But if I'm going to fit something
better than a crystal, I might as well do the best I can whilst not
breaking
the bank.

  Sent from my iPad





Sent from my Sun Ultra 27. (Perhaps next time I'll send from a Sun T5240
or
some other Sun, or even my laptop. I'll keep you informed of which!)

Dave


--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

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--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

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--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

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Re: [time-nuts] IEEE Spectrum Magazine interviews one of our own...

[Rex]

Let's see if my mail client wraps the looong link too...

http://spectrum.ieee.org/podcast/at-work/innovation/does-anybody-really-know-what-time-it-is/?utm_source=techalert&utm_medium=email&utm_campaign=051911

I was expecting a video, but it's still nice as an mp3


On 5/24/2011 7:00 PM, Tom Holmes wrote:


  Podcast: When Will We Get Serious About the Leap Second?

We all go along with the agreement to add a 366th day to the calendar every
fourth year. But few people outside of computer scientists and managers of
computer chip foundries-whose operation depends on fraction-of-a-second
precision-have even heard of the leap second. Host Steven Cherry talks with
Poul-Henning Kamp, an independent software developer who maintains the
principal network time servers for his home nation of Denmark. Among the
many questions Kamp addresses is why a standard way of dealing with this
tiny but crucial adjustment in time has yet to be enacted.



Tom Holmes, N8ZM

Tipp City, OH

EM79



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Re: [time-nuts] smallest rubidium

[Robert Darlington]

I actually asked in jest, thinking there was no such beast and that it was a
typo.  I'm an old Sun guy, apparently too old to know about the new stuff.
Looks like an expensive PC.

On Tue, May 24, 2011 at 9:33 PM, Dr. David Kirkby
wrote:

> On 05/25/11 03:29 AM, Robert Darlington wrote:
>
>> What's an Ultra 27?
>>
>> -Bob
>>
>
> My posted ended in "Sent from my Sun Ultra 27", in response to someone's
> post which had at the bottom "Sent from my iPad".
>
> I'm sure if you are interested, it would not take take long to find out
> what a "Sun Ultra 27" is.
>
> Dave
>
>
>
>> On Tue, May 24, 2011 at 11:47 AM, Dr. David Kirkby
>> wrote:
>>
>>  On 05/24/11 06:51 AM, Said Jackson wrote:
>>>
>>>  How about a GPSDO in 1 x 1 x 0.5 inch footprint?

 Check out the new MtronPTI M9107 and M9107 GPSDOs.

 Check out the press release about these on our Jackson Labs Tech website
 for more info..

 Better than 4E-013 over 100K seconds typically, beats most RBs.

 Said


>>> I don't want to rely on an external reference. I want to keep the unit
>>> self-contained. Once I determine the amount of space available, I'll look
>>> to
>>> see if its practical to fit an OCXO.
>>>
>>> I don't need huge accuracy with this. But if I'm going to fit something
>>> better than a crystal, I might as well do the best I can whilst not
>>> breaking
>>> the bank.
>>>
>>>  Sent from my iPad
>>>


>>> Sent from my Sun Ultra 27. (Perhaps next time I'll send from a Sun T5240
>>> or
>>> some other Sun, or even my laptop. I'll keep you informed of which!)
>>>
>>> Dave
>>>
>>>
>>> --
>>> A: Because it messes up the order in which people normally read text.
>>> Q: Why is top-posting such a bad thing?
>>> A: Top-posting.
>>> Q: What is the most annoying thing in e-mail?
>>>
>>> ___
>>> 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
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>> and follow the instructions there.
>>
>>
>
> --
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?
>
> ___
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Re: [time-nuts] smallest rubidium

[Dr. David Kirkby]

On 05/25/11 03:29 AM, Robert Darlington wrote:

What's an Ultra 27?

-Bob


My posted ended in "Sent from my Sun Ultra 27", in response to someone's post 
which had at the bottom "Sent from my iPad".


I'm sure if you are interested, it would not take take long to find out what a 
"Sun Ultra 27" is.


Dave



On Tue, May 24, 2011 at 11:47 AM, Dr. David Kirkby
wrote:


On 05/24/11 06:51 AM, Said Jackson wrote:


How about a GPSDO in 1 x 1 x 0.5 inch footprint?

Check out the new MtronPTI M9107 and M9107 GPSDOs.

Check out the press release about these on our Jackson Labs Tech website
for more info..

Better than 4E-013 over 100K seconds typically, beats most RBs.

Said



I don't want to rely on an external reference. I want to keep the unit
self-contained. Once I determine the amount of space available, I'll look to
see if its practical to fit an OCXO.

I don't need huge accuracy with this. But if I'm going to fit something
better than a crystal, I might as well do the best I can whilst not breaking
the bank.

  Sent from my iPad




Sent from my Sun Ultra 27. (Perhaps next time I'll send from a Sun T5240 or
some other Sun, or even my laptop. I'll keep you informed of which!)

Dave


--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

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--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

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Re: [time-nuts] smallest rubidium

[Robert Darlington]

What's an Ultra 27?

-Bob

On Tue, May 24, 2011 at 11:47 AM, Dr. David Kirkby
wrote:

> On 05/24/11 06:51 AM, Said Jackson wrote:
>
>> How about a GPSDO in 1 x 1 x 0.5 inch footprint?
>>
>> Check out the new MtronPTI M9107 and M9107 GPSDOs.
>>
>> Check out the press release about these on our Jackson Labs Tech website
>> for more info..
>>
>> Better than 4E-013 over 100K seconds typically, beats most RBs.
>>
>> Said
>>
>
> I don't want to rely on an external reference. I want to keep the unit
> self-contained. Once I determine the amount of space available, I'll look to
> see if its practical to fit an OCXO.
>
> I don't need huge accuracy with this. But if I'm going to fit something
> better than a crystal, I might as well do the best I can whilst not breaking
> the bank.
>
>  Sent from my iPad
>>
>
> Sent from my Sun Ultra 27. (Perhaps next time I'll send from a Sun T5240 or
> some other Sun, or even my laptop. I'll keep you informed of which!)
>
> Dave
>
>
> --
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
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>
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[time-nuts] Top Posting Clarified - Hopefully

[Perry Sandeen]

Exalted Listers,

Because of the high amount of useable technical information to me I copy each 
month’s postings to a word file.  I do this for two reasons.  First is that 
sub-dividing posts into different subject files is just too complicated.  
Secondly net archived information relies on the goodwill of the provide r(s) 
and is not guaranteed to be there when one might want/need it.  I usually end 
up with over 200 pages of condensed information. 

My top posting complaint is not because of one earlier post at the bottom.  
That is reference information.  Typically, in the past, it was not uncommon to 
see top posting of five or six previous posts.  This would then fill up four or 
five pages.

There might be two or three such top postings for each issue.  Deleting all of 
this extra repetition becomes a mighty PITA for someone like me who is still a 
neophyte in this area of expertise and attempting to become better educated.

I thoroughly enjoy the sometimes mislabeled as OT adventures (and the 
occasional mis-adventures).  They provide both knowledgeable insight and a deep 
appreciation of previous attempts toward technical excellence.

I’m very appreciative of the more pruned issues of late.

Regards,

Perrier   




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[time-nuts] IEEE Spectrum Magazine interviews one of our own...

[Tom Holmes]

 
 Podcast: When Will We Get Serious About the Leap Second?

We all go along with the agreement to add a 366th day to the calendar every
fourth year. But few people outside of computer scientists and managers of
computer chip foundries-whose operation depends on fraction-of-a-second
precision-have even heard of the leap second. Host Steven Cherry talks with
Poul-Henning Kamp, an independent software developer who maintains the
principal network time servers for his home nation of Denmark. Among the
many questions Kamp addresses is why a standard way of dealing with this
tiny but crucial adjustment in time has yet to be enacted.

 

Tom Holmes, N8ZM

Tipp City, OH

EM79

 

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Re: [time-nuts] Allan Variance vs. Least squares

[Magnus Danielson]

Hi Olaf,

On 05/23/2011 12:23 PM, Olaf Bossen wrote:

Hi there,

I am looking for some advice on stability metrics for a slow oscillator.
The oscillator is used to do a measurement of another quantity which is
connected to the frequency of the Oscillator. I have taken generously
oversampled data of the oscillator voltage and now I have two
contradicting measures:

1) When I record the zero crossings and use them as phase data for the
Allan variance, the minimum is 10^-4 and it initially decays with a
slope of t^-0.5


Please notice that while we say that we measure Allan variance we plot 
the Allan deviation. The initial slope of t^-1 is expected from the 
measurement limitation of your measurement system.



2) On the other hand if I do least squares fits of the same data with
consecutively longer runs the reported frequency uncertainty goes down
to sigma_f/f = 10^-7. It also drops much faster with t^-1.5 wich seems
to be due to the "Cramèr-Rao lower bound" (not that I really understand
what it means), and it doesn't really go up again


Don't do that. You will perform a form of filtering and you no longer 
measure something attempting to be Allan deviation. Use overlapping or 
similar estimator to get good



It seems to be common lore that the Allan variance minimum is the best
obtainable frequency accuracy for an oscillator, but the least squares
fits seem to be much better. I have problems understanding this.


Allan Variance/Deviation performs a particular filtering prior to 
squaring and averaging.


Modified Allan Variance/Deviation performs another particular filtering 
prior to squaring and averaging.


Hadamard Variance/Deviation performs yeat another particular filtering 
prior to squaring and averaging.


You just did a different filtering mechanism. Some of these filterings 
have known bias functions and biases can be significant. Standard 
variance/deviation can for some noise-types have a bias reaching for 
infinity.


So trying to be "smart" like this doesn't provide you with true Allan 
variance. You may however spend quite some time analysing these bias 
functions for the various noise-types and by using dominant noise 
identification algorithms selecting among bias functions for that 
particular tau.


As you notice, this is tedious and might not be as rewarding as one may 
initially think. I would warmly recommend another approach.



I have a mental picture that might explain this, maybe you can tell me
if it seems correct to you: Oscillators are running at a very precise
frequency much better than what our measurement devices are capable of
resolving. So the drop in the Allan variance, that is initially gained
when the measurement is longer, is actually just the reduction of the
measurement error for this precise frequency. Only when the Allan
variance goes up again, we are on a timescale over which the true
frequency of the oscillator varies.


Depending on tau your counter or your reference will provide a 
measurement floor. There are methods to measure below this. But prior to 
making bold statements relating to this, one should use methods known to 
be repeatable, bias free and providing low noise. You should be able to 
get essentially the same results regardless of setup, as long as it is 
not significantly worse than the clock you try to measure.


Ponder over this article:
http://en.wikipedia.org/wiki/Allan_variance

I don't know if this is the answer you seek, but I do hope it is 
interesting at least.


Cheers,
Magnus

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Re: [time-nuts] smallest rubidium

[Dr. David Kirkby]

On 05/24/11 06:51 AM, Said Jackson wrote:

How about a GPSDO in 1 x 1 x 0.5 inch footprint?

Check out the new MtronPTI M9107 and M9107 GPSDOs.

Check out the press release about these on our Jackson Labs Tech website for 
more info..

Better than 4E-013 over 100K seconds typically, beats most RBs.

Said


I don't want to rely on an external reference. I want to keep the unit 
self-contained. Once I determine the amount of space available, I'll look to see 
if its practical to fit an OCXO.


I don't need huge accuracy with this. But if I'm going to fit something better 
than a crystal, I might as well do the best I can whilst not breaking the bank.



Sent from my iPad


Sent from my Sun Ultra 27. (Perhaps next time I'll send from a Sun T5240 or some 
other Sun, or even my laptop. I'll keep you informed of which!)


Dave

--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

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Re: [time-nuts] Top Posting...

[J. Forster]

Hey Gene,

Did you bring Peter back with you?

-John

=


> Sorry Burt that was me. I have it on my list to reply, but I was in
> Dayton.
> Got back this morning at 9:30 and have to fly out again at 5 (leaving for
> the airport in 30 minutes)! Will reply when time permits. thanks
>
> 73 Eugene W2HX
>
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Burt I. Weiner
> Sent: Tuesday, May 24, 2011 1:04 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] Top Posting...
>
> A little something for everyone.  A friend of mine used to say< "A
> good compromise is when everyone is equally mad."  :>
>
> How did the fellow make out with his DATUM 9390 that was initially
> gathering and then losing satellites?  Has anyone heard?
>
> Burt
>
>>Subject: Re: [time-nuts] Top Posting...
>>
>>
>>On 24 May 2011 11:57, Mike S  wrote:
>>
>> > At 05:24 PM 5/23/2011, Burt I. Weiner wrote...
>> >
>> >  I also prefer top posting.  It makes life a lot simpler.
>> >>
>> >
>> > Then you should change your MUA so it puts your .sig at the top, too.
> Right
>> > now, you're both top _and_ bottom posting.
>> >
>> > Well that should please everyone now then :)
>>
>>Steve
>>
>
> Burt I. Weiner Associates
> Broadcast Technical Services
> Glendale, California  U.S.A.
> b...@att.net
> www.biwa.cc
> K6OQK
>
>
> ___
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>
>
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>
>



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Re: [time-nuts] Top Posting...

[W2HX]

Sorry Burt that was me. I have it on my list to reply, but I was in Dayton.
Got back this morning at 9:30 and have to fly out again at 5 (leaving for
the airport in 30 minutes)! Will reply when time permits. thanks

73 Eugene W2HX


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Burt I. Weiner
Sent: Tuesday, May 24, 2011 1:04 PM
To: time-nuts@febo.com
Subject: [time-nuts] Top Posting...

A little something for everyone.  A friend of mine used to say< "A 
good compromise is when everyone is equally mad."  :>

How did the fellow make out with his DATUM 9390 that was initially 
gathering and then losing satellites?  Has anyone heard?

Burt

>Subject: Re: [time-nuts] Top Posting...
>
>
>On 24 May 2011 11:57, Mike S  wrote:
>
> > At 05:24 PM 5/23/2011, Burt I. Weiner wrote...
> >
> >  I also prefer top posting.  It makes life a lot simpler.
> >>
> >
> > Then you should change your MUA so it puts your .sig at the top, too.
Right
> > now, you're both top _and_ bottom posting.
> >
> > Well that should please everyone now then :)
>
>Steve
>

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
b...@att.net
www.biwa.cc
K6OQK 


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[time-nuts] Top Posting...

[Burt I. Weiner]

A little something for everyone.  A friend of mine used to say< "A 
good compromise is when everyone is equally mad."  :>


How did the fellow make out with his DATUM 9390 that was initially 
gathering and then losing satellites?  Has anyone heard?


Burt


Subject: Re: [time-nuts] Top Posting...


On 24 May 2011 11:57, Mike S  wrote:

> At 05:24 PM 5/23/2011, Burt I. Weiner wrote...
>
>  I also prefer top posting.  It makes life a lot simpler.
>>
>
> Then you should change your MUA so it puts your .sig at the top, too. Right
> now, you're both top _and_ bottom posting.
>
> Well that should please everyone now then :)

Steve



Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
b...@att.net
www.biwa.cc
K6OQK 



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Re: [time-nuts] smallest rubidium

[Richard W. Solomon]

Problem solved ...
Their website does not like Firefox, it downloaded fairly quickly 
using MS Exploder !!

73, Dick, W1KSZ 


-Original Message-
>From: Tijd Dingen 
>Sent: May 24, 2011 9:41 AM
>To: Discussion of precise time and frequency measurement 
>Subject: Re: [time-nuts] smallest rubidium
>
>Maybe he should just dial the firewall back or something. ;->
>
>
>
>
>From: David VanHorn 
>To: Richard W. Solomon ; Discussion of precise time and 
>frequency measurement 
>Sent: Tuesday, May 24, 2011 5:35 PM
>Subject: Re: [time-nuts] smallest rubidium
>
>
>Works for me, do you have a Mordrac in the way?
>
>
>From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of 
>Richard W. Solomon [w1...@earthlink.net]
>Sent: Tuesday, May 24, 2011 9:28 AM
>To: Discussion of precise time and frequency measurement
>Subject: Re: [time-nuts] smallest rubidium
>
>I tried to download the User Manual several times and it keeps bombing
>at about 90%. Must be busted, since I can download other manuals on the
>same site.
>
>I'll have to inquire about pricing.
>
>73, Dick, W1KSZ
>
>
>-Original Message-
>>From: Said Jackson 
>>Sent: May 23, 2011 10:51 PM
>>To: Discussion of precise time and frequency measurement 
>>Cc: "time-nuts@febo.com" 
>>Subject: Re: [time-nuts] smallest rubidium
>>
>>How about a GPSDO in 1 x 1 x 0.5 inch footprint?
>>
>>Check out the new MtronPTI M9107 and M9107 GPSDOs.
>>
>>Check out the press release about these on our Jackson Labs Tech website for 
>>more info..
>>
>>Better than 4E-013 over 100K seconds typically, beats most RBs.
>>
>>Said
>>
>>Sent from my iPad
>>
>>On May 23, 2011, at 10:17, Magnus Danielson  
>>wrote:
>>
>>> On 05/23/2011 03:07 PM, Dr. David Kirkby wrote:
 On 05/23/11 09:31 AM, Rob Kimberley wrote:
> Try
> http://www.symmetricom.com/media/files/downloads/product-datasheets/DS_SA.22
>
> c.pdf
>
> Rob Kimberley

 Thank you. I don't have know what board area I have available, but I
 think think its going to be considerably less than that size. I think
 the only option will be to use an TCXO, which to be honest is good
 enough, but if there were small rubidiums, I would consider using one.
 But it seems they are not as small as I would have liked.
>>>
>>> What board size do you have, what stability do you really need?
>>>
>>> Can you fit a DIP14 package?
>>>
>>> Cheers,
>>> Magnus
>>>
>>> ___
>>> 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.
>
>
>___
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>To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>and follow the instructions there.
>
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>and follow the instructions there.
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>To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>and follow the instructions there.


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Re: [time-nuts] smallest rubidium

[Tijd Dingen]

Maybe he should just dial the firewall back or something. ;->




From: David VanHorn 
To: Richard W. Solomon ; Discussion of precise time and 
frequency measurement 
Sent: Tuesday, May 24, 2011 5:35 PM
Subject: Re: [time-nuts] smallest rubidium


Works for me, do you have a Mordrac in the way?


From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of 
Richard W. Solomon [w1...@earthlink.net]
Sent: Tuesday, May 24, 2011 9:28 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] smallest rubidium

I tried to download the User Manual several times and it keeps bombing
at about 90%. Must be busted, since I can download other manuals on the
same site.

I'll have to inquire about pricing.

73, Dick, W1KSZ


-Original Message-
>From: Said Jackson 
>Sent: May 23, 2011 10:51 PM
>To: Discussion of precise time and frequency measurement 
>Cc: "time-nuts@febo.com" 
>Subject: Re: [time-nuts] smallest rubidium
>
>How about a GPSDO in 1 x 1 x 0.5 inch footprint?
>
>Check out the new MtronPTI M9107 and M9107 GPSDOs.
>
>Check out the press release about these on our Jackson Labs Tech website for 
>more info..
>
>Better than 4E-013 over 100K seconds typically, beats most RBs.
>
>Said
>
>Sent from my iPad
>
>On May 23, 2011, at 10:17, Magnus Danielson  wrote:
>
>> On 05/23/2011 03:07 PM, Dr. David Kirkby wrote:
>>> On 05/23/11 09:31 AM, Rob Kimberley wrote:
 Try
 http://www.symmetricom.com/media/files/downloads/product-datasheets/DS_SA.22

 c.pdf

 Rob Kimberley
>>>
>>> Thank you. I don't have know what board area I have available, but I
>>> think think its going to be considerably less than that size. I think
>>> the only option will be to use an TCXO, which to be honest is good
>>> enough, but if there were small rubidiums, I would consider using one.
>>> But it seems they are not as small as I would have liked.
>>
>> What board size do you have, what stability do you really need?
>>
>> Can you fit a DIP14 package?
>>
>> Cheers,
>> Magnus
>>
>> ___
>> 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.


___
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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Re: [time-nuts] smallest rubidium

[David VanHorn]

Works for me, do you have a Mordrac in the way?


From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of 
Richard W. Solomon [w1...@earthlink.net]
Sent: Tuesday, May 24, 2011 9:28 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] smallest rubidium

I tried to download the User Manual several times and it keeps bombing
at about 90%. Must be busted, since I can download other manuals on the
same site.

I'll have to inquire about pricing.

73, Dick, W1KSZ


-Original Message-
>From: Said Jackson 
>Sent: May 23, 2011 10:51 PM
>To: Discussion of precise time and frequency measurement 
>Cc: "time-nuts@febo.com" 
>Subject: Re: [time-nuts] smallest rubidium
>
>How about a GPSDO in 1 x 1 x 0.5 inch footprint?
>
>Check out the new MtronPTI M9107 and M9107 GPSDOs.
>
>Check out the press release about these on our Jackson Labs Tech website for 
>more info..
>
>Better than 4E-013 over 100K seconds typically, beats most RBs.
>
>Said
>
>Sent from my iPad
>
>On May 23, 2011, at 10:17, Magnus Danielson  wrote:
>
>> On 05/23/2011 03:07 PM, Dr. David Kirkby wrote:
>>> On 05/23/11 09:31 AM, Rob Kimberley wrote:
 Try
 http://www.symmetricom.com/media/files/downloads/product-datasheets/DS_SA.22

 c.pdf

 Rob Kimberley
>>>
>>> Thank you. I don't have know what board area I have available, but I
>>> think think its going to be considerably less than that size. I think
>>> the only option will be to use an TCXO, which to be honest is good
>>> enough, but if there were small rubidiums, I would consider using one.
>>> But it seems they are not as small as I would have liked.
>>
>> What board size do you have, what stability do you really need?
>>
>> Can you fit a DIP14 package?
>>
>> Cheers,
>> Magnus
>>
>> ___
>> 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.


___
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

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Re: [time-nuts] smallest rubidium

[Richard W. Solomon]

I tried to download the User Manual several times and it keeps bombing 
at about 90%. Must be busted, since I can download other manuals on the 
same site.

I'll have to inquire about pricing.

73, Dick, W1KSZ


-Original Message-
>From: Said Jackson 
>Sent: May 23, 2011 10:51 PM
>To: Discussion of precise time and frequency measurement 
>Cc: "time-nuts@febo.com" 
>Subject: Re: [time-nuts] smallest rubidium
>
>How about a GPSDO in 1 x 1 x 0.5 inch footprint?
>
>Check out the new MtronPTI M9107 and M9107 GPSDOs. 
>
>Check out the press release about these on our Jackson Labs Tech website for 
>more info..
>
>Better than 4E-013 over 100K seconds typically, beats most RBs.
>
>Said
>
>Sent from my iPad
>
>On May 23, 2011, at 10:17, Magnus Danielson  wrote:
>
>> On 05/23/2011 03:07 PM, Dr. David Kirkby wrote:
>>> On 05/23/11 09:31 AM, Rob Kimberley wrote:
 Try
 http://www.symmetricom.com/media/files/downloads/product-datasheets/DS_SA.22
 
 c.pdf
 
 Rob Kimberley
>>> 
>>> Thank you. I don't have know what board area I have available, but I
>>> think think its going to be considerably less than that size. I think
>>> the only option will be to use an TCXO, which to be honest is good
>>> enough, but if there were small rubidiums, I would consider using one.
>>> But it seems they are not as small as I would have liked.
>> 
>> What board size do you have, what stability do you really need?
>> 
>> Can you fit a DIP14 package?
>> 
>> Cheers,
>> Magnus
>> 
>> ___
>> 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.


___
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and follow the instructions there.