Mike,
Thunderbolt is going to bring You from NY to SF at exactly 55MPH AVERAGE, down to the fraction of the INPH, and still there is a possibility that You earn a speeding ticket or two (or more) on the way. Predrag Dukic (also not an expert, but things are not that simple as Your question) At 15:09 21.12.2008, you wrote: >Hello, Time-Nutters-- > >Bruce said: > > > A statement of accuracy is of little value unless you also give: > > 1) An estimate of the accuracy of standard used for comparison. > > 2) An estimate of the random and systematic errors in the comparison > > 3) Some details of the comparison method. > > 4) Averaging time and other pertinent info. >------------------------------ > >Mike asked: > > > What frequency reference did they use at the university standards > lab to measure the T-Bolt frequency? And how did they measure its > frequency? > > > How did they do the comparison to your TBolt? If it was a counter, > what kind was it? > > > You mentioned the error was better than 1e-12 90% of the time. What > was the average error? >------------------------------ > > >Hi, Bruce, Mike, et al-- > >Your points are all well taken! However, all I wanted to >know (and all I asked the standards lab) was: How much >"ballpark" error will I have when using my T-bolt as a >reference to confirm the frequency of my 10GHz ham transmitter? >Yes, from a Time-Nuts perspective, my question is crude and >unsophisticated, but I simply did not have any interest in >knowing anything about the T-bolt except how good it is when >used as a reference for checking the frequency output of my >10GHz transmitter. I really did not care about ADEV, MDEV, >XYZDEV or any other alphabet soup criteria, and yes, I know >that this confirms that I am a primitive knuckle-dragging >troglodyte with respect to the subtle nuances of time and >frequency standards... > >It's kinda like looking at the speedometer on my pickup truck >as I drive down the Interstate highway....: My only interest >is that it be accurate enough to use for my particular >application. Same goes for my T-bolt... Can I trust it >to get me within 10Hz at 10GHz? +/- 100Hz? +/- 1KHz? > >As for what the lab used to make the measurements, all I can >say is that the lab has several time/frequency references, >one I saw was about the size of a refrigerator called a >CH1-75 Active Hydrogen Maser. Big-- looked expensive, >blinking lights, pretty colors... impressed me. > >I'll go back to my cave, now... > >Cheers!! > >Mike Baker >WA4HFR >Gainesville, Florida, USA > > >_______________________________________________ >time-nuts mailing list -- [email protected] >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
