From: Dr Bruce Griffiths <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] TIC resolution impact on GPSDO's performance
Date: Thu, 28 Dec 2006 17:33:19 +1300
Message-ID: <[EMAIL PROTECTED]>
> Didier
>
> Yes, using an integrated high stability oscillator in the GPS receiver
> provides all the local osc
Well he hasn't any pictures (just ask for some).
Does anyone know what the output frequency is?
What shape the Rubidium would be in?
Thanks,
Jack
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Bill Hawkins
Sent: Tuesday, December 26, 2006 10:06 PM
To: '
Didier Juges wrote:
> Dr Bruce Griffiths wrote:
>
>> Didier Juges wrote:
>>
>>
>>> Hi David,
>>>
>>> David I. Emery wrote:
>>>
>>>
>>>
On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
> When reading the
Dr Bruce Griffiths wrote:
> Dr Bruce Griffiths wrote:
>
>> Dr Bruce Griffiths wrote:
>>
>>
>>> Didier Juges wrote:
>>>
>>>
>>>
Hi David,
David I. Emery wrote:
> On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier
Dr Bruce Griffiths wrote:
> Didier Juges wrote:
>
>> Hi David,
>>
>> David I. Emery wrote:
>>
>>
>>> On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
>>>
>>>
>>>
>>>
When reading the data sheet for the Thunderbolt, and reading all the
pitfalls assoc
Very nice pictures!
My RFTG-m-RB was waiting by the back door today when I got home. I *just*
took it apart, and surprise surprise inside is an Efratom LPRO-101 inside...
Not a Freq Elec whatever model, I guess maybe it must be a different
revision or something?
The boards inside look nearly the
Dr Bruce Griffiths wrote:
> Dr Bruce Griffiths wrote:
>
>> Didier Juges wrote:
>>
>>
>>> Hi David,
>>>
>>> David I. Emery wrote:
>>>
>>>
>>>
On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
> When readi
Dr Bruce Griffiths wrote:
> Didier Juges wrote:
>
>> Hi David,
>>
>> David I. Emery wrote:
>>
>>
>>> On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
>>>
>>>
>>>
>>>
When reading the data sheet for the Thunderbolt, and reading all the
pitfalls assoc
Didier Juges wrote:
> Hi David,
>
> David I. Emery wrote:
>
>> On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
>>
>>
>>
>>> When reading the data sheet for the Thunderbolt, and reading all the
>>> pitfalls associated with non-integrated GPSDO designs using stand alone
>>>
(Shameless plug for my friend Bill Riley and his awesome Stable32 software)
Both TheoH and Theo1 have been easily available in the last few upgrades of
Stable32. I believe Bill Riley was coauthor on some of the early papers
with David Howe of NIST.
Like all stability predictors, use Theo with
Has anyone used the new frequency stability measure reported in
http://www.tf.nist.gov/timefreq/general/pdf/2109.pdf
It allows somewhat quicker determination of long term frequency
stability characteristics than using the Allan variance or its derivatives.
Bruce
___
Dr Bruce Griffiths said the following on 12/27/2006 04:35 PM:
> John Ackermann N8UR wrote:
>> The 15MHz out surprised me to. I haven't traced out the circuits but
>> from a couple of the components, I am guessing that they do something
>> like take the 3rd harmonic of the 10MHz OCXO and dividing t
John Ackermann N8UR wrote:
> The 15MHz out surprised me to. I haven't traced out the circuits but
> from a couple of the components, I am guessing that they do something
> like take the 3rd harmonic of the 10MHz OCXO and dividing that by 2.
>
John
That is not likely to be the scheme used, as t
David I. Emery wrote:
> On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
>
>
>> When reading the data sheet for the Thunderbolt, and reading all the
>> pitfalls associated with non-integrated GPSDO designs using stand alone
>> GPS receivers, such as sawtooth correction and quantiz
Hi David,
David I. Emery wrote:
> On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
>
>
>> When reading the data sheet for the Thunderbolt, and reading all the
>> pitfalls associated with non-integrated GPSDO designs using stand alone
>> GPS receivers, such as sawtooth correction
David I. Emery said the following on 12/27/2006 01:21 AM:
> I have ordered a Lucent RFTG-M-XO box but it has yet to arrive -
> however, looking at the photos published today, it does not seem clear
> they don't use a GPS receiver with an external clock. Not easy to tell
> since the guts of
The 15MHz out surprised me to. I haven't traced out the circuits but
from a couple of the components, I am guessing that they do something
like take the 3rd harmonic of the 10MHz OCXO and dividing that by 2.
However, it also looks like it should be easy to bypass that stuff and
get right to the 10
On Wed, December 27, 2006 11:30, Rex said:
> On Tue, 26 Dec 2006 22:06:28 -0600, "Bill Hawkins" <[EMAIL PROTECTED]>
> wrote:
>
>>What's all this about 15 MHz out?
>>
>>Bill Hawkins
>
> I have an FRS-C rubidium (10 MHz) that I bought a couple years ago. It
> came in a metal box that also contained a
Dr Bruce Griffiths wrote:
> Rex wrote:
>
>> On Tue, 26 Dec 2006 22:06:28 -0600, "Bill Hawkins" <[EMAIL PROTECTED]>
>> wrote:
>>
>>
>>
>>> What's all this about 15 MHz out?
>>>
>>> Bill Hawkins
>>>
>>>
>> I have an FRS-C rubidium (10 MHz) that I bought a couple years ago. It
>
Rex wrote:
> On Tue, 26 Dec 2006 22:06:28 -0600, "Bill Hawkins" <[EMAIL PROTECTED]>
> wrote:
>
>
>> What's all this about 15 MHz out?
>>
>> Bill Hawkins
>>
>
> I have an FRS-C rubidium (10 MHz) that I bought a couple years ago. It
> came in a metal box that also contained a circuit board th
On Tue, 26 Dec 2006 22:06:28 -0600, "Bill Hawkins" <[EMAIL PROTECTED]>
wrote:
>What's all this about 15 MHz out?
>
>Bill Hawkins
I have an FRS-C rubidium (10 MHz) that I bought a couple years ago. It
came in a metal box that also contained a circuit board that provided 3
TNC output connectors. Tw
Didier,
looking at your plots, i see that your 'Tau'on the main page is set to
0.5 instead of 2 as it should be with your measurement arrangement. I
understand that due to the unity '/s' you were fooled into thinking that
you need to compute a '1/2' sample rate from your measurement
arrangemant.
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