[time-nuts] SRS SR620 External Source Issue -- Help Request

Brooke Clarke brooke at pacific.net
Wed Feb 21 18:04:34 EST 2007


Hi Flavio:

Have you tried using averaging?  The right most digits are from an 
interpolator and if  you check the manual the displayed resolution is 
much greater than the accuracy, but if you average say 1,000 readings 
then those digits get much better.  Also have you done the self calibration?

Have Fun,

Brooke Clarke

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



TheInfamousFlavio at hotmail.com wrote:

>I have an SR620 counter that I set up with a Z3801A as an external reference.  If I put a bnc T connector at the output of the Z3801A and use two equal length bnc cables, one to the ext. ref input on the back and the other to channel A then do a frequency measurement, I get a mean that is about .0015 Hz below 10,000,000.0000Hz.
>
>Does any know why this might be happening? I would expect it to read 10,000,000.0000 exactly give or take a couple on the last digit.
>
>_______________________________________________
>time-nuts mailing list
>time-nuts at febo.com
>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>
>  
>



More information about the time-nuts mailing list