> Hockey puck (or mouse) type GPS receivers are available for under $100. > > What can I get in that price range that doesn't depend on GPS? I'm > interested in millisecond accuracy as well as nanosecond. > > Has anybody built a WWVB-DO? (Time to dust off my WWVB toys.) > > Is there some good WWV setup?
I have an HP 117A and loop. It works much of the time, but has diurnal night/day shifts of a good fraction of a 60 KHz cycle. It really takes continuous monitoring for several days to get good numbers. > Somebody mentioned TV and radio stations recently. (I think it was part > of the North discussion.) > > What sort of frequency source is at the root of the local TV or radio > stations? > > Is the sync timing for TV stations derived from the same source as the > carrier? Or are there two separate clocks to discuss? How about the > color-burst frequency? NTSC is gone w/ analog TV. No color burst any more. > What do radio/TV stations do for backups? If there was a hurricane or > earthquake that broke the main transmitter are they likely to switch to a > backup with a different timing source? I'm not sure, but when satellite links go down, the picture freezes. That implies a frame store which is likely bad news for timing. FWIW, -John =============== _______________________________________________ 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.
