Will Kimber <zl1...@gmx.com> wrote: > If you listened to Radio New Zealand National news New Year's day > morning you would have heard then stating there will be 7 pips at 1:00pm. > > However there were only 6 !!! So what happened?
I was listening to both of the above events too, and agree with your comments Will. The following is just my "observations" over the last few years as a keen RNZ listener, and so may not be correct to those in the know. To my ears, there are two "types" of Time Pips: The "normal" time pips sound like reasonably pure sine-waves of 1KHz, and are always correct to my house standard, and would be derived from the atomic clocks at: Measurement Standards Laboratory Callaghan Innovation PO Box 31 310 Lower Hutt 5040 New Zealand https://www.msl.irl.cri.nz/services/time-and-frequency The "other" time pips sound different, they appear to be shorter in duration and more like a square-wave at 1KHz than a sine-wave. I assume they are locally generated at RNZ and are used when the land-line to Lower Hutt is broken by road-works, earthquakes, or a digger driver with a careless hand ! In the past I have detected the "other" time pips drifting by about half a second per day, so I assume it's a relatively simple XO that is used rather than a GPS which I thought would have been a better option for a standby reference. So my guess as to what is currently going on (for RNZ time pips) is that they are using the backup system , which appears to be manually set - and is yet to be manually set by a man! Maybe someone who knows someone in RNZ engineering, can give a more accurate picture than just my conjecture. Regards, Geoff ( Christchurch, New Zealand ). _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
