Empathy List Archives

MS

Martyn Smith

Wed, Sep 29, 2010 4:18 PM

Hello,

Can anyone recommend software to calulate the Allan varaince from a set of
data?

I have taken many measurements with the SR620 using it's 500 second gate and
downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I want
to know the Allan Varaince over a 10000 second sample instead of 500
seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 06:37:00

Hello, Can anyone recommend software to calulate the Allan varaince from a set of data? I have taken many measurements with the SR620 using it's 500 second gate and downloaded the results into Excel. I can use the SR620 itself to calulate the Allan Variance. However, I want to know the Allan Varaince over a 10000 second sample instead of 500 seconds. Hoping to plug the data into software and get the result!! Regards Martyn No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 06:37:00

MD

Magnus Danielson

Wed, Sep 29, 2010 4:29 PM

On 09/29/2010 06:18 PM, Martyn Smith wrote:

Hello,

Can anyone recommend software to calulate the Allan varaince from a set
of data?

I have taken many measurements with the SR620 using it's 500 second gate
and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

John Miles has written some nice software.

http://www.thegleam.com/ke5fx/timelab/readme.htm

It is intended to do the measurement direct, so the measurement log
becomes in the right format.

Cheers,
Magnus

On 09/29/2010 06:18 PM, Martyn Smith wrote: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a set > of data? > > I have taken many measurements with the SR620 using it's 500 second gate > and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! John Miles has written some nice software. http://www.thegleam.com/ke5fx/timelab/readme.htm It is intended to do the measurement direct, so the measurement log becomes in the right format. Cheers, Magnus

A

Adrian

Wed, Sep 29, 2010 7:42 PM

Martyn,

check this:
http://www.wriley.com/

Regards,
Adrian

Martyn Smith schrieb:

Hello,

Can anyone recommend software to calulate the Allan varaince from a
set of data?

I have taken many measurements with the SR620 using it's 500 second
gate and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 06:37:00

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.

Martyn, check this: http://www.wriley.com/ Regards, Adrian Martyn Smith schrieb: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a > set of data? > > I have taken many measurements with the SR620 using it's 500 second > gate and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! > > Regards > > Martyn > > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 06:37:00 > > > > _______________________________________________ > 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.

JM

John Miles

Wed, Sep 29, 2010 10:09 PM

Can anyone recommend software to calulate the Allan varaince from a set
of data?

I have taken many measurements with the SR620 using it's 500 second gate
and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

John Miles has written some nice software.

http://www.thegleam.com/ke5fx/timelab/readme.htm

It is intended to do the measurement direct, so the measurement log
becomes in the right format.

There's a nicer-looking beta version at
http://www.ke5fx.com/timelab/setup_test.exe as well, which has some
rendering improvements such as antialiasing and window/font resizing. It
should work with the SR620 in either direct-measurement mode (either
addressable or talk-only), or via File->Import ASCII Phase or Frequency
Data.

Also see Ulrich Bangert's plotter program (Google 'DF6JB plotter' for a
link). It has some data-manipulation features beyond what TimeLab does.

-- john, KE5FX

> > Can anyone recommend software to calulate the Allan varaince from a set > > of data? > > > > I have taken many measurements with the SR620 using it's 500 second gate > > and downloaded the results into Excel. > > > > I can use the SR620 itself to calulate the Allan Variance. However, I > > want to know the Allan Varaince over a 10000 second sample instead of > > 500 seconds. > > > > Hoping to plug the data into software and get the result!! > > John Miles has written some nice software. > > http://www.thegleam.com/ke5fx/timelab/readme.htm > > It is intended to do the measurement direct, so the measurement log > becomes in the right format. There's a nicer-looking beta version at http://www.ke5fx.com/timelab/setup_test.exe as well, which has some rendering improvements such as antialiasing and window/font resizing. It should work with the SR620 in either direct-measurement mode (either addressable or talk-only), or via File->Import ASCII Phase or Frequency Data. Also see Ulrich Bangert's plotter program (Google 'DF6JB plotter' for a link). It has some data-manipulation features beyond what TimeLab does. -- john, KE5FX

BK

Brian Kirby

Thu, Sep 30, 2010 2:03 AM

And ALAVAR
http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=30

And PLOTTER http://ulrich-bangert.de/html/downloads.html

On 9/29/2010 11:18 AM, Martyn Smith wrote:

Hello,

Can anyone recommend software to calulate the Allan varaince from a set
of data?

I have taken many measurements with the SR620 using it's 500 second gate
and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 06:37:00

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.

And ALAVAR http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=30 And PLOTTER http://ulrich-bangert.de/html/downloads.html On 9/29/2010 11:18 AM, Martyn Smith wrote: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a set > of data? > > I have taken many measurements with the SR620 using it's 500 second gate > and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! > > Regards > > Martyn > > > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 06:37:00 > > > > _______________________________________________ > 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.

SC

SAL CORNACCHIA

Thu, Sep 30, 2010 3:43 PM

Hello Time-Nutters,

I would like to get a 10 MHz frequency standard for My Lab, and would like
some information on what would be the best choice and would like to know the
difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and
Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very
much appreciated.
Thank You,
Sal C. Cornacchia

From: Brian Kirby kilodelta4foxmike@gmail.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Wed, September 29, 2010 10:03:11 PM
Subject: Re: [time-nuts] Allan Variance

And ALAVAR
http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=30

And PLOTTER http://ulrich-bangert.de/html/downloads.html

On 9/29/2010 11:18 AM, Martyn Smith wrote:

Hello,

Can anyone recommend software to calulate the Allan varaince from a set
of data?

I have taken many measurements with the SR620 using it's 500 second gate
and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10
06:37:00

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.

Hello Time-Nutters, I would like to get a 10 MHz frequency standard for My Lab, and would like some information on what would be the best choice and would like to know the difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very much appreciated. Thank You, Sal C. Cornacchia ________________________________ From: Brian Kirby <kilodelta4foxmike@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wed, September 29, 2010 10:03:11 PM Subject: Re: [time-nuts] Allan Variance And ALAVAR http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=30 And PLOTTER http://ulrich-bangert.de/html/downloads.html On 9/29/2010 11:18 AM, Martyn Smith wrote: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a set > of data? > > I have taken many measurements with the SR620 using it's 500 second gate > and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! > > Regards > > Martyn > > > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 >06:37:00 > > > > _______________________________________________ > 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.

JL

J. L. Trantham, M. D.

Thu, Sep 30, 2010 7:46 PM

LPRO needs to be calibrated. Once calibrated, should be pretty good for a
reasonable period of time, depending on what your performance criteria are,
probably a year or so for amateur radio type stuff.

Thunderbolt is linked to NIST, via the GPS satellites, and never needs
calibration.

LPRO more of a 'transfer standard', Thunderbolt more of a 'primary
standard'.

Price, probably, slightly cheaper for the LPRO but I prefer the Thunderbolt.
It goes from 'off' to locked to GPS in about 10 minutes or less (not the
first time though) once your antenna is installed and not moving around.

Joe

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of SAL CORNACCHIA
Sent: Thursday, September 30, 2010 10:44 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] 10 MHz Frequency Standard

Hello Time-Nutters,

I would like to get a 10 MHz frequency standard for My Lab, and would like
some information on what would be the best choice and would like to know the
difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and
Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be
very
much appreciated.
Thank You,
Sal C. Cornacchia

From: Brian Kirby kilodelta4foxmike@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Wed, September 29, 2010 10:03:11 PM
Subject: Re: [time-nuts] Allan Variance

And ALAVAR
http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=3
0

And PLOTTER http://ulrich-bangert.de/html/downloads.html

On 9/29/2010 11:18 AM, Martyn Smith wrote:

Hello,

Can anyone recommend software to calulate the Allan varaince from a set
of data?

I have taken many measurements with the SR620 using it's 500 second gate
and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10
06:37:00

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.

LPRO needs to be calibrated. Once calibrated, should be pretty good for a reasonable period of time, depending on what your performance criteria are, probably a year or so for amateur radio type stuff. Thunderbolt is linked to NIST, via the GPS satellites, and never needs calibration. LPRO more of a 'transfer standard', Thunderbolt more of a 'primary standard'. Price, probably, slightly cheaper for the LPRO but I prefer the Thunderbolt. It goes from 'off' to locked to GPS in about 10 minutes or less (not the first time though) once your antenna is installed and not moving around. Joe -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On Behalf Of SAL CORNACCHIA Sent: Thursday, September 30, 2010 10:44 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] 10 MHz Frequency Standard Hello Time-Nutters, I would like to get a 10 MHz frequency standard for My Lab, and would like some information on what would be the best choice and would like to know the difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very much appreciated. Thank You, Sal C. Cornacchia ________________________________ From: Brian Kirby <kilodelta4foxmike@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wed, September 29, 2010 10:03:11 PM Subject: Re: [time-nuts] Allan Variance And ALAVAR http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=3 0 And PLOTTER http://ulrich-bangert.de/html/downloads.html On 9/29/2010 11:18 AM, Martyn Smith wrote: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a set > of data? > > I have taken many measurements with the SR620 using it's 500 second gate > and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! > > Regards > > Martyn > > > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: 09/29/10 >06:37:00 > > > > _______________________________________________ > 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. _______________________________________________ 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.

PL

Paramithiotti, Luciano Paolo S

Fri, Oct 1, 2010 7:14 AM

LPRO have an high 10Mhz phase noise; if you want a rubidium, FRK is better than LPRO but I suggest the Trimble or HP GPS freq standard.

Luciano P. S. Paramithiotti
IZ5JHJ

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of J. L. Trantham, M. D.
Sent: giovedì 30 settembre 2010 21.46
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 10 MHz Frequency Standard

LPRO needs to be calibrated. Once calibrated, should be pretty good for a reasonable period of time, depending on what your performance criteria are, probably a year or so for amateur radio type stuff.

Thunderbolt is linked to NIST, via the GPS satellites, and never needs calibration.

LPRO more of a 'transfer standard', Thunderbolt more of a 'primary standard'.

Price, probably, slightly cheaper for the LPRO but I prefer the Thunderbolt.
It goes from 'off' to locked to GPS in about 10 minutes or less (not the first time though) once your antenna is installed and not moving around.

Joe

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of SAL CORNACCHIA
Sent: Thursday, September 30, 2010 10:44 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] 10 MHz Frequency Standard

Hello Time-Nutters,

I would like to get a 10 MHz frequency standard for My Lab, and would like some information on what would be the best choice and would like to know the difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very much appreciated.
Thank You,
Sal C. Cornacchia

From: Brian Kirby kilodelta4foxmike@gmail.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Wed, September 29, 2010 10:03:11 PM
Subject: Re: [time-nuts] Allan Variance

And ALAVAR
http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=3
0

And PLOTTER http://ulrich-bangert.de/html/downloads.html

On 9/29/2010 11:18 AM, Martyn Smith wrote:

Hello,

Can anyone recommend software to calulate the Allan varaince from a
set of data?

I have taken many measurements with the SR620 using it's 500 second
gate and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date:
09/29/10 06:37:00

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.

LPRO have an high 10Mhz phase noise; if you want a rubidium, FRK is better than LPRO but I suggest the Trimble or HP GPS freq standard. Luciano P. S. Paramithiotti IZ5JHJ -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of J. L. Trantham, M. D. Sent: giovedì 30 settembre 2010 21.46 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 10 MHz Frequency Standard LPRO needs to be calibrated. Once calibrated, should be pretty good for a reasonable period of time, depending on what your performance criteria are, probably a year or so for amateur radio type stuff. Thunderbolt is linked to NIST, via the GPS satellites, and never needs calibration. LPRO more of a 'transfer standard', Thunderbolt more of a 'primary standard'. Price, probably, slightly cheaper for the LPRO but I prefer the Thunderbolt. It goes from 'off' to locked to GPS in about 10 minutes or less (not the first time though) once your antenna is installed and not moving around. Joe -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On Behalf Of SAL CORNACCHIA Sent: Thursday, September 30, 2010 10:44 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] 10 MHz Frequency Standard Hello Time-Nutters, I would like to get a 10 MHz frequency standard for My Lab, and would like some information on what would be the best choice and would like to know the difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very much appreciated. Thank You, Sal C. Cornacchia ________________________________ From: Brian Kirby <kilodelta4foxmike@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wed, September 29, 2010 10:03:11 PM Subject: Re: [time-nuts] Allan Variance And ALAVAR http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=3 0 And PLOTTER http://ulrich-bangert.de/html/downloads.html On 9/29/2010 11:18 AM, Martyn Smith wrote: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a > set of data? > > I have taken many measurements with the SR620 using it's 500 second > gate and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! > > Regards > > Martyn > > > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: >09/29/10 06:37:00 > > > > _______________________________________________ > 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. _______________________________________________ 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.

SC

SAL CORNACCHIA

Fri, Oct 1, 2010 3:24 PM

Hi Luciano,

Thank You for the information, it will help me to decide on what to get.
Best regards,
Sal C. Cornacchia
Electronic RF Microwave Engineer (Ret.)

From: "Paramithiotti, Luciano Paolo S" luciano.paramithiotti@hp.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Fri, October 1, 2010 3:14:28 AM
Subject: Re: [time-nuts] 10 MHz Frequency Standard

LPRO have an high 10Mhz phase noise; if you want a rubidium, FRK is better than
LPRO but I suggest the Trimble or HP GPS freq standard.

Luciano P. S. Paramithiotti
IZ5JHJ

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf
Of J. L. Trantham, M. D.
Sent: giovedì 30 settembre 2010 21.46
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 10 MHz Frequency Standard

LPRO needs to be calibrated. Once calibrated, should be pretty good for a
reasonable period of time, depending on what your performance criteria are,
probably a year or so for amateur radio type stuff.

Thunderbolt is linked to NIST, via the GPS satellites, and never needs
calibration.

LPRO more of a 'transfer standard', Thunderbolt more of a 'primary standard'.

Price, probably, slightly cheaper for the LPRO but I prefer the Thunderbolt.
It goes from 'off' to locked to GPS in about 10 minutes or less (not the first
time though) once your antenna is installed and not moving around.

Joe

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of SAL CORNACCHIA
Sent: Thursday, September 30, 2010 10:44 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] 10 MHz Frequency Standard

Hello Time-Nutters,

I would like to get a 10 MHz frequency standard for My Lab, and would like some
information on what would be the best choice and would like to know the
difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and
Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very
much appreciated.
Thank You,
Sal C. Cornacchia

From: Brian Kirby kilodelta4foxmike@gmail.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Wed, September 29, 2010 10:03:11 PM
Subject: Re: [time-nuts] Allan Variance

And ALAVAR
http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=3
0

And PLOTTER http://ulrich-bangert.de/html/downloads.html

On 9/29/2010 11:18 AM, Martyn Smith wrote:

Hello,

Can anyone recommend software to calulate the Allan varaince from a
set of data?

I have taken many measurements with the SR620 using it's 500 second
gate and downloaded the results into Excel.

I can use the SR620 itself to calulate the Allan Variance. However, I
want to know the Allan Varaince over a 10000 second sample instead of
500 seconds.

Hoping to plug the data into software and get the result!!

Regards

Martyn

No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date:
09/29/10 06:37:00

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.

time-nuts mailing list -- time-nuts@febo.com
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Hi Luciano, Thank You for the information, it will help me to decide on what to get. Best regards, Sal C. Cornacchia Electronic RF Microwave Engineer (Ret.) ________________________________ From: "Paramithiotti, Luciano Paolo S" <luciano.paramithiotti@hp.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Fri, October 1, 2010 3:14:28 AM Subject: Re: [time-nuts] 10 MHz Frequency Standard LPRO have an high 10Mhz phase noise; if you want a rubidium, FRK is better than LPRO but I suggest the Trimble or HP GPS freq standard. Luciano P. S. Paramithiotti IZ5JHJ -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of J. L. Trantham, M. D. Sent: giovedì 30 settembre 2010 21.46 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 10 MHz Frequency Standard LPRO needs to be calibrated. Once calibrated, should be pretty good for a reasonable period of time, depending on what your performance criteria are, probably a year or so for amateur radio type stuff. Thunderbolt is linked to NIST, via the GPS satellites, and never needs calibration. LPRO more of a 'transfer standard', Thunderbolt more of a 'primary standard'. Price, probably, slightly cheaper for the LPRO but I prefer the Thunderbolt. It goes from 'off' to locked to GPS in about 10 minutes or less (not the first time though) once your antenna is installed and not moving around. Joe -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On Behalf Of SAL CORNACCHIA Sent: Thursday, September 30, 2010 10:44 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] 10 MHz Frequency Standard Hello Time-Nutters, I would like to get a 10 MHz frequency standard for My Lab, and would like some information on what would be the best choice and would like to know the difference from EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard and Thunderbolt PRECISION GPS 10mhz FREQUENCY&TIME Standard any help would be very much appreciated. Thank You, Sal C. Cornacchia ________________________________ From: Brian Kirby <kilodelta4foxmike@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wed, September 29, 2010 10:03:11 PM Subject: Re: [time-nuts] Allan Variance And ALAVAR http://www.alamath.com/index.php?option=com_content&task=view&id=12&Itemid=3 0 And PLOTTER http://ulrich-bangert.de/html/downloads.html On 9/29/2010 11:18 AM, Martyn Smith wrote: > Hello, > > Can anyone recommend software to calulate the Allan varaince from a > set of data? > > I have taken many measurements with the SR620 using it's 500 second > gate and downloaded the results into Excel. > > I can use the SR620 itself to calulate the Allan Variance. However, I > want to know the Allan Varaince over a 10000 second sample instead of > 500 seconds. > > Hoping to plug the data into software and get the result!! > > Regards > > Martyn > > > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3166 - Release Date: >09/29/10 06:37:00 > > > > _______________________________________________ > 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. _______________________________________________ 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. _______________________________________________ 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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Allan Variance