David Woolley <da...@ex.djwhome.demon.invalid> writes: >David Malone wrote:
>> The Rugby unit was built by Ian Dowse, and is described here: >> >> http://www.maths.tcd.ie/~dwmalone/time/rugby.html >> >This is a simple AM detector for the slow code (I don't know if the fast >code is still transmitted). It doesn't phase lock onto the carrier. Yep - It just delivers the pulses to DCD on a serial port. The driver uses the PPS API and averages the second marks over the minute before delivering the dates to NTP via the SHM driver. I do have some software radio stuff that looks at various long wave signals. Where I am, we can hear MSF, DCF, BBC 4 and TDF, all of which carry time signals. I have some plots of the phase here: http://www.maths.tcd.ie/~dwmalone/phase.png You can clearly see the phase-modulated timecodes on top of BBC 4 and TDF. Josh Tobin did some work with me to write software decoders for these over the summer, and had the TDF signal working as an NTP refclock. We haven't cleaned the code up yet, but hope to soon. David. _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions