Hi
Wow, that guy did a *lot* of work on all that. Congratulations to the him and
those kind enough to translate it.
Per an off list request there’s at least one additional circuit to add to his
list:
Wire the RF as shown on page 17 of the MAdS slides but:
1) Use an RPD-1 (or modern
On Tue, 20 Jan 2015 08:39:13 +0100
Attila Kinali att...@kinali.ch wrote:
2-3 years ago, i got a presentation of an italian amateur radio on
how to measure phase noise of osciallators using this technique in quite
detail. Only draw back is that the presentation is in italian. If someone
wants
Hej Attila,
On 02/06/2015 01:22 PM, Attila Kinali wrote:
Moin Magnus,
On Wed, 21 Jan 2015 07:07:54 +0100
Magnus Danielson mag...@rubidium.dyndns.org wrote:
For oscillators, they should have been turned on long enough such that
any drift is negligible. Alternatively you process out the
Moin Magnus,
On Wed, 21 Jan 2015 07:07:54 +0100
Magnus Danielson mag...@rubidium.dyndns.org wrote:
For oscillators, they should have been turned on long enough such that
any drift is negligible. Alternatively you process out the quadratic
trend out of it. The later should be accompanied by
Bob
Camp
Envoyé : dimanche 25 janvier 2015 19:01
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] question Alan deviation measured with Timelab
and counters
Hi
The approach in the original NIST paper below was sort of a “best
guess” about how to do the limiting
the IF ?
Stephane
-Message d'origine-
De : time-nuts [mailto:time-nuts-boun...@febo.com] De la part de Bob Camp
Envoyé : dimanche 25 janvier 2015 19:01
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi
and frequency measurement
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi
The approach in the original NIST paper below was sort of a “best guess” about
how to do the limiting and filtering. When the paper was presented, a number of
us questioned how that part
Stephane wrote:
I'm now trying to evaluate various architectures of 2-channels
squarers and a DMDT. For that I'm designing a PCB with 4 squarers :
simple 74ac04 gate biased at VCC/2, a LT1016 comparator, the
transistor based differential amplifier from Winzel and the one from Charles.
Note
: Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Stephane wrote:
I'm now trying to evaluate various architectures of 2-channels squarers
and a DMDT. For that I'm designing a PCB with 4 squarers :
simple 74ac04 gate biased at VCC/2, a LT1016 comparator, the transistor
: 'Discussion of precise time and frequency measurement'
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi,
Following the tests results in the previous email, today I've performed
additional measurements showing that the repeatability of the GPSDO DUT is not
great
: time-nuts [mailto:time-nuts-boun...@febo.com] De la part de Stéphane Rey
Envoyé : mardi 20 janvier 2015 23:15
À : 'Discussion of precise time and frequency measurement'
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi,
Following the tests results
23:15
À : 'Discussion of precise time and frequency measurement'
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi,
Following the tests results in the previous email, today I've performed
additional measurements showing that the repeatability
] De la part de Stéphane Rey
Envoyé : mardi 20 janvier 2015 23:15
À : 'Discussion of precise time and frequency measurement'
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi,
Following the tests results in the previous email, today I've performed
additional
Hi Stéphane,
have you read W. Riley's paper on a DMTD system?
http://www.wriley.com/A%20Small%20DMTD%20System.pdf
Cheers,
Adrian
Stéphane Rey schrieb:
Hi guys.
After several experiments I could discover that the bad ADEV from the two
GPSDO DUT are due to GPS lock losses. This is probably
John,
On 01/20/2015 01:55 AM, John Miles wrote:
John,
Your new three-corner hat feature is really cool. Already tried it, even
if I did not spend quality time on setting source labels correctly.
Whenever I have a setup capable of running it, I will test-spin it again.
I suspect that when you
On Mon, 19 Jan 2015 08:59:58 -0500
Bob Camp kb...@n1k.org wrote:
The most basic way to do phase noise in the basement is with a single mixer
setup running into some sort of audio FFT device. A sound card can be used or
an audio spectrum analyzer. Parts are $100 to get one setup once you can
: time-nuts [mailto:time-nuts-boun...@febo.com] De la part de Stéphane Rey
Envoyé : lundi 19 janvier 2015 22:32
À : 'Discussion of precise time and frequency measurement'
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi
Here are the results of today's
John,
Your new three-corner hat feature is really cool. Already tried it, even
if I did not spend quality time on setting source labels correctly.
Whenever I have a setup capable of running it, I will test-spin it again.
I suspect that when you make separate measurements, the noise of
and frequency measurement'
Cc : mag...@rubidium.se
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Bonsoir Stéphane,
On 01/18/2015 10:34 PM, Stéphane Rey wrote:
Thanks a lot Bob and Magnus for your very helpful comments.
The HP5370a was indeed in TI
Bonsoir Stéphane,
On 01/18/2015 10:34 PM, Stéphane Rey wrote:
Thanks a lot Bob and Magnus for your very helpful comments.
The HP5370a was indeed in TI mode. By the way what is the difference with
+/-TI, the button just aside...
But I guess I understand where I've missed something : I've
; 'Discussion of precise time and frequency measurement'
Cc : mag...@rubidium.se
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Bonsoir Stéphane,
On 01/18/2015 10:34 PM, Stéphane Rey wrote:
Thanks a lot Bob and Magnus for your very helpful comments.
The HP5370a
and frequency
measurement'
Cc : mag...@rubidium.se
Objet : Re: [time-nuts] question Alan deviation measured with
Timelab and counters
Bonsoir Stéphane,
On 01/18/2015 10:34 PM, Stéphane Rey wrote:
Thanks a lot Bob and Magnus for your very helpful comments.
The HP5370a was indeed in TI mode
One way to get around problems with things like GPSDO’s is to have multiple
standards and use them for different ranges of Tau. OCXO’s have good ADEV
close in. Picking up a few and comparing them is pretty cheap. Rb’s have
better
ADEV at longer tau ( 300 sec). Comparing three or four is not
Hi
I’m a little concerned about the measurement setup here. Based on the quoted
text, there have been a few messages in the thread that have not showed up
here.
=
The “start” input on the counter is defined below. The “stop” input is not
defined. Is the counter running in time
Stephane wrote:
I need to make a squarer. I was hesitating between several methods
: using a CMOS gate, but this will increase the flicker noise from
what I've read, using an amplifier and clamping diodes or a fast
comparator which might create some noise around the trigger
point... Any
-
De : time-nuts [mailto:time-nuts-boun...@febo.com] De la part de Bob Camp
Envoyé : dimanche 18 janvier 2015 14:44
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi
Ok, I didn’t think I’d seen the plots
Hi
Ok, I didn’t think I’d seen the plots before.
I agree that the plots look like “counter limited” data. That’s a fine
explanation at the shorter Tau’s. I also agree that some sort of periodic
“stuff” is getting into one of the signals and creating the ripple. What I’m
wondering about (and
Hi Bob,
On 01/18/2015 04:25 AM, Bob Camp wrote:
Hi
I’m a little concerned about the measurement setup here. Based on the quoted
text, there have been a few messages in the thread that have not showed up here.
The messages got accidentally posted in the wrong thread.
=
The “start”
Bob,
On 01/18/2015 02:44 PM, Bob Camp wrote:
Hi
Ok, I didn’t think I’d seen the plots before.
I agree that the plots look like “counter limited” data. That’s a fine
explanation at the shorter Tau’s. I also agree that some sort of periodic
“stuff” is getting into one of the signals and
[mailto:time-nuts-boun...@febo.com] De la part de Bob Camp
Envoyé : dimanche 18 janvier 2015 14:44
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi
Ok, I didn’t think I’d seen the plots before
Bonjour Stéphane,
On 01/18/2015 03:37 PM, Stéphane Rey wrote:
Hello,
First, please do apologize for the confusion answering in the bad email. That's
things I'm absolutely able to do when replying at 3 am ! Again, sorry for that
and thanks Magnus for having corrected this.
Ah well, that's
de Magnus
Danielson
Envoyé : dimanche 18 janvier 2015 16:47
À : time-nuts@febo.com
Cc : mag...@rubidium.se
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Bonjour Stéphane,
On 01/18/2015 03:37 PM, Stéphane Rey wrote:
Hello,
First, please do apologize
Bonsoir Stéphane,
(For Stéphane's unedited reply, look in the Current state thread)
On 01/17/2015 12:36 AM, Stéphane Rey wrote:
Hi,
I've took the time to read carefully your long and detailed message
Magnus and this was very interesting. I've learned many things that have
enabled me to
-Message d'origine-
De : time-nuts [mailto:time-nuts-boun...@febo.com] De la part de Magnus
Danielson
Envoyé : mercredi 14 janvier 2015 08:04
À : time-nuts@febo.com
Cc : mag...@rubidium.se
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Bonjour Stéphane,
On 01
Will investigate further today
-Message d'origine-
De : time-nuts [mailto:time-nuts-boun...@febo.com] De la part de John Miles
Envoyé : mercredi 14 janvier 2015 07:26
À : 'Discussion of precise time and frequency measurement'
Objet : Re: [time-nuts] question Alan deviation measured
Bonjour Stéphane,
On 01/14/2015 02:16 AM, Stéphane Rey wrote:
Hi Magnus,
For some reason I've missed this message and the one from Jim until now ! This
answers many of the questions I had. For my defense, I've 3000 messages since
the last 3 months on the list !!!
ah, yes, I'd like to get
Envoyé : vendredi 9 janvier 2015 23:57
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Hi
If your only instrument is a counter.
— and —
You never measure past 1x10^-10 with that counter
— and —
Measurements
: Re: [time-nuts] question Alan deviation measured with Timelab and
counters
Stephane,
On 01/09/2015 12:53 PM, steph.rey wrote:
Dear all,
I'm trying to measure Alan Deviations using Timelab and some frequency
counters.
The device under test is a GPSDO using a TCXO as référence
I've
- Can I use Frequency difference mode from Timelab to monitor time intervals ?
If no is there a way to use the time interval measurement from the counter
with
Timelab to plot ADEV ?
If you feed in frequency samples, it will convert them to phase-difference
samples internally, so the program
Stephane,
On 01/09/2015 12:53 PM, steph.rey wrote:
Dear all,
I'm trying to measure Alan Deviations using Timelab and some frequency
counters.
The device under test is a GPSDO using a TCXO as référence
I've an HP58503B GPSDO which feeds my counters. I've tried an HP5342A,
0-18 GHz, 1 Hz
Hi
If your only instrument is a counter.
— and —
You never measure past 1x10^-10 with that counter
— and —
Measurements that bounce around with a standard deviation of the difference
between readings of 1x10^-10 are ok.
— then —
No, you don’t need anything better than a 1x10^-10 ADEV.
Hi Bob,
Many thanks for your prompt and detailled answer.
My question on applications wasn't on good ADEV where I perfetcly
understand the need, but actually what could be the applications of
measuring BAD ADEV (10e-7). That was my point asking what king of
application can we cover by
On 1/9/15 7:42 AM, steph.rey wrote:
Hi Bob,
Many thanks for your prompt and detailled answer.
My question on applications wasn't on good ADEV where I perfetcly
understand the need, but actually what could be the applications of
measuring BAD ADEV (10e-7). That was my point asking what king of
Dear all,
I'm trying to measure Alan Deviations using Timelab and some frequency
counters.
The device under test is a GPSDO using a TCXO as référence
I've an HP58503B GPSDO which feeds my counters. I've tried an HP5342A,
0-18 GHz, 1 Hz resolution and a Philipps PM6654C, 0.01Hz resolution.
Hi
Welcome to the world of trying to measure this stuff …
On Jan 9, 2015, at 6:53 AM, steph.rey steph@wanadoo.fr wrote:
Dear all,
I'm trying to measure Alan Deviations using Timelab and some frequency
counters.
The device under test is a GPSDO using a TCXO as référence
I've an
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