I was actually doing that at first with my Sprint cellphone, but quickly=20
learned that it has significant jitter -- as much 5 minutes.  I don't dou=
bt=20
over a looonnng term that it'll be more accurate, but it seems that=20
time-updating is low-priority.  I would've thought that it would keep it'=
s=20
own time internally and sync with the network, but it apparently doesn't.

My t-mobile phone does not grab time from the network.  T-mobile is still=
=20
very, very low tech, and can't even send vmail notifications to the phone=
=2E...=20
they send a text-message when a vmail comes in.

Cheers,
-Neil.


On Wednesday 11 June 2003 13:17, Steve Ruse scribbled:
> If you are in the US (and probably a lot of other places), you can use =
a
> cell phone to get accurate time since they are constantly corrected whe=
n
> recieving a signal. I have tested a few against each other, & most seem=
 to
> be set by the US atomic standard time (I don't remember the "official"
> name). I checked two cell phones from different providers (Sprint &
> Cingular, I believe) as well as an atomic "radio" clock, & all were wit=
hin
> 1/2 second of each other.
>
> Steve
>
> Quoting Picdude <picdude@NARWANI.ORG>:
> > Got my PIC clock working now, using the 32.768khz crystal and it
> > "appears" to
> >
> > hold time much more accurately than with the Mhz-range crystals, but =
how
> > do I
> >
> > know for sure? .... all of the 10 clocks I have here are all differen=
t by
> > as
> >
> > much as 7 minutes, so I don't know which to trust.
> >
> > Is there a place I can connect to or call for accurate time?
> >
> > Cheers,
> > -Neil.
> >
> > --
> > http://www.piclist.com hint: PICList Posts must start with ONE topic:
> > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads