[time-nuts] GPS Week 1536 causing problems?

Pascal Nguyen vk2ihl at gmail.com
Tue Jul 7 04:42:32 UTC 2009


Hi 18X owners

I experienced same problem with my fleet of 16HVS (originated from Kit
Scally ?).
The non functioning GPS is not on Garmin PVT mode, neither NMEA mode !!!.
Reconfigured by using SNSRCFG software switch to NMEA  or Garmin  mode, my
16HVS is back to business.

http://www8.garmin.com/support/collection.jsp?product=010-00321-05

Pascal

On Tue, Jul 7, 2009 at 1:48 PM, M. Warner Losh <imp at bsdimp.com> wrote:

> In message: <4A52BD4F.5020000 at rubidium.dyndns.org>
>            Magnus Danielson <magnus at rubidium.dyndns.org> writes:
> : Hal Murray wrote:
> : >>>> Anyone else lose an 18x?
> : >
> : >>> I lost one a while ago.  Similar.  It just stopped doing anything
> : >>> useful.
> : >
> : >> Battery failure?
> : >
> : > I don't think it has a battery inside.  That seems like a poor design.
>  Too
> : > many reasonable use cases would include sitting in a drawer for
> extended
> : > periods of time.
> :
> : Providing an RTC has benefits, especially when considering week-rollover
> : issues, since when the receiver wakes up it has no idea of date at all,
> : pulling in the RTC time and date is a sufficient hint, and adjusting
> : with detailed info from the GPS is a trivial extention. Then adjusting
> : the RTC is not a hard thing to do every once in a while. The same
> : problem could also be solved using EEPROM space. A byte would suffice.
>
> Usually, you're right.  There's one case that might make it not
> suitable.
>
> Many contracts require spares for all the important gear.  Long
> storage times makes storing the last known date ineffective.  Of
> course in this case "long" is on the order of 9-odd years.  This may
> be good for many applications, but not necessarily ones that have 10
> or 15 year deep spares requirements...
>
> Warner
>
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