[time-nuts] Brooks Shera's GPS standard or HP Z3801A??

Brooke Clarke brooke at pacific.net
Tue Apr 26 10:38:29 EDT 2005


Hi Tom:

Don't forget that SRS has the free PC program Rbmon that talks to the 
PRS10, although it's listed with a different Rb product.

73,

Brooke


Tom Van Baak wrote:

>>Why would it be cheaper than building Brook Shera's unit? You still need 
>>all the same electronics, but a more expensive oscillator (I assume the 
>>PRS10 is going to cost more than an HP 18011A.)
>>    
>>
>
>The data sheet for the PRS10 is at:
>http://www.thinksrs.com/products/PRS10.htm
>http://www.thinksrs.com/downloads/PDFs/Manuals/PRS10m.pdf
>
>  
>
>>How does the short term phase noise of the PRS10's compare with the HP 
>>10811A? I guess in the long term, they will both be the same if you link 
>>them to a GPS source, but short term you have said will be dominated by 
>>the crystal oscillator.
>>    
>>
>
>The ADEV for a PRS10 at 1 to 10 seconds is on the
>order of 1e-11 making it 10x worse than the 10811
>inside a Z3801A. So the choice depends on what
>you want to use the output of your GPSDO for.
>
>  
>
>>I guess a current unit is likely to be better than a 20-30 year old one.
>>    
>>
>
>Not necessarily true. Some of the best oscillators in
>the world were made 30 to 40 years ago. On the other
>hand, you can't beat a PRS10 for features. Check out
>the manual for the list of commands.
>
>/tvb
>
>
>
>_______________________________________________
>time-nuts mailing list
>time-nuts at febo.com
>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>
>
>
>  
>

-- 
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com




More information about the time-nuts mailing list