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 -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.