[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.
>
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