time-nuts@lists.febo.com

Discussion of precise time and frequency measurement

View all threads

Re: [time-nuts] How accurate are cheap radio controlled clocks?

E
EWKehren@aol.com
Sun, Jun 26, 2011 4:34 PM

I have one of my Junghans Mega next to my computer and use it for ebay
bidding and it is always better than a second.    Bert  Kehren

In a message dated 6/26/2011 10:23:16 A.M. Eastern Daylight Time,
david.kirkby@onetel.net writes:

On  06/26/11 07:25 AM, David J Taylor wrote:

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.

I was using 198.00 kHz longwave here in the  UK. Unless there's some
digital
processing going on before the signal is  AM modulated, this can't explain
the
problem.

--
A: Because it  messes up the order in which people normally read text.
Q: Why is  top-posting such a bad thing?
A: Top-posting.
Q: What is the most  annoying thing in  e-mail?


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.

I have one of my Junghans Mega next to my computer and use it for ebay bidding and it is always better than a second. Bert Kehren In a message dated 6/26/2011 10:23:16 A.M. Eastern Daylight Time, david.kirkby@onetel.net writes: On 06/26/11 07:25 AM, David J Taylor wrote: >> 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. I was using 198.00 kHz longwave here in the UK. Unless there's some digital processing going on before the signal is AM modulated, this can't explain the problem. -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? _______________________________________________ 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.