[time-nuts] HP 10811A/B OCXO OP/SRV manual is onlineathparchive.com AND HP 5501B manual.

Dr Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Nov 7 17:25:44 EST 2006


Jack Hudler wrote:
> Sheeesh! 
> Actually I use the 5501B for its intended purpose... I'm a bit of a precision
> nut. Never seen an Allan variance plot of one.
>
> I prefer 473.6057788309637 THz :)
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf
> Of Robert Atkinson
> Sent: Tuesday, November 07, 2006 2:55 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 10811A/B OCXO OP/SRV manual is onlineathparchive.com
> AND HP 5501B manual.
>
> Hi Jack,
>
> Great scan!
>
> I was also most interested to see you had scanned the manual for another
> HP reference that I have - the 5501B. With an accuracy of 1x10-7 and
> stability of 2x10-8 it's not that great but the frequency is 473612.23
> GHz! For those who have not caught on yet, the 5501B is a stabilised
> laser with about 1mW of 632.991372nm (red) output.
>
>  
>
> Many thanks,
>
> Robert G8RPI.
>
>  
>
>  
>
> ________________________________
>
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Jack Hudler
> Sent: 06 November 2006 19:31
> To: 'Discussion of precise time and frequency measurement'
> Subject: [time-nuts] HP 10811A/B OCXO OP/SRV manual is online
> athparchive.com
>
>  
>
> I just finished and posted the 10811A/B OP/SRV to hparchives.com.
>
>  
>
> http://www.hparchive.com/Manuals/HP-10811AB-Manual.pdf
>
>  
>
> Enjoy,
>
> Jack
>
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>   
To measure the Allan variance you need at least 2 (preferably more) 
stabilised lasers and a mixer (photodiode) plus a suitable amplifier to 
produce a beat signal for analysis.
The beat frequency may be as high as 100 MHz with a pair of 5501s 
(frequency/wavelength accuracy of 0.1ppm) so the photodiode and 
associated amplifier will need adequate bandwidth.

Bruce




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