> I have a few GPSDO's (Trimble T-Bolt, Z3801A, TrueTime & HB units). > How much better can the Cesium be than any of those ??
Here is another viewpoint... (I don't own a Cesium (but I'm looking) so my opinions may not be relevant.) What are you after? What is important to you? Under the covers, a "Cesium" is just a CesiumDO with the PLL parameters tuned to take advantage of what the Cesium tube can deliver. The basic time constant is sub-second vs many-seconds for a GPSDO. If you are nutty enough, the GPSDO numbers don't really match what a Cesium can deliver in the medium term time scale, say 1000-10000 seconds. I'm pretty sure I've seen graphs of GPS time shifting slightly from night to day due to atmospheric changes. A Cesium won't do that. On the other hand, a GPSDO won't have any long term drift. It's locked to the best time we can get. If you wait long enough a Cesium will drift. Not very fast, but it will drift. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ 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.
