[time-nuts] How accurate are cheap radio controlled clocks?
David J Taylor
david-taylor at blueyonder.co.uk
Sun Jun 26 06:25:02 UTC 2011
> I've got one of the cheap radio-controlled clocks? I was listing to
> radio 4 the other day and herd the time signal. The radio controlled
> clock was about 3 seconds off. I was a bit surprised it was so far off.
> I'm just wondering how accurate these things are.
David,
Be aware that if listening via digital radio (or worse, digital TV) there
is a delay in the transmission chain of up to several seconds (DTV). I
expect you know that already! Use the FM signal for best results.
Here, I have a couple of analogue display and a couple of digital display
"radio clocks". The digital are both about a quarter of a second slow,
and the two analogue display clocks are spot-on, as near a damn it.
I'm located in Edinburgh and using the Anthorn 60KHz souce:
http://www.npl.co.uk/science-technology/time-frequency/time/products-and-services/msf-radio-time-signal
BTW: the "pips" went missing recently:
http://www.bbc.co.uk/news/uk-13610203
Hope that helps.
Cheers,
David
--
SatSignal software - quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor at blueyonder.co.uk
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