Speaking of WWVB clocks: does any company actually manufacture a preconfigured WWVB clock with a serial interface anymore? I've been unable to find one. Spectracom and the other manufacturers that used to make them seem to have switched over to GPS entirely.
The reason I ask is I'd like to set up a refclock at my employer's HQ, but the datacenter is in the 10th floor of a 50-floor high rise. The building is closely surrounded by others with similar or greater height. I can't use GPS becuase none of the windows open, renting roof space is not possible, and I cannot get any GPS signal through the windows. The location is basically the worst "urban canyon" scenario you can imagine . I'm 1462.5 km (4.8 ms) from the WWVB transmitters, which is well inside the coverage area maps on the NIST site. I figure WWVB is my best (only?) option for a refclock at this location. Is sub-milisecond accuracy possible using a WWVB refclock? The NIST site says 0.1 to 15 ms phase error, which is two orders of magnitude. I see ~5 ms average offsets when I sync with nearby stratum-1 servers via NTP. Would WWVB perform any better? I'd rather not build a WWVB receiver and antenna if I can just buy one for use with NTP. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
