While my next plot of Droitwich is being generated at this moment, for the meantime here's an analysis of the short term stability of the Leo-Bodnar GPSDO made a couple of years ago. It was done by multiplying the output up to 10GHz and comparing with a caesium derived reference multiplied up.
The results, which show the performance over the tens of seconds to minutes time frame can be seen here . http://www.g4jnt.com/ShortTermStabilityLeoBodnarGPSDO.pdf Compare this with a test done a few days ago, comparing the 10MHz outputs over a 30 minute period. http://www.g4jnt.com/DropF/gpsdo_cs_10mhz_30min.bmp This sort of short term stability reflects on how 'good' a GPSDO is when used as a reference for a synthesizer for microwave Tx/Rx. The artefacts are just about audible at 5.76GHz when listening to a steady tone (they are to me anyway, although it may be only a few Hz wobble) and very definitely so at 24GHz and higher. Andy www.g4jnt.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
