[time-nuts] 10 MHz Frequency Standard

[SAL CORNACCHIA]

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 at hp.com>
To: Discussion of precise time and frequency measurement <time-nuts at 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 at febo.com [mailto:time-nuts-bounces at 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 at febo.com [mailto:time-nuts-bounces at 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 at gmail.com>
To: Discussion of precise time and frequency measurement <time-nuts at 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
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>09/29/10 06:37:00
>
>
>
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