[time-nuts] Z3801A gps week rollover

Bob kb8tq kb8tq at n1k.org
Mon Sep 5 09:03:24 EDT 2016


The rollover is in the GPS module firmware. If you dig into it, they didn't quite update the firmware once every 3 months, but almost that often. Each manufacturer latched onto various versions as they sailed by. None of them had a validation process that could keep up with 4 releases a year...


> On Sep 5, 2016, at 8:44 AM, Ben Hall <kd5byb at gmail.com> wrote:
>> On 9/4/2016 10:48 PM, Mark Sims wrote:
>> Sometime (I didn't have it connected) in  the last couple of weeks
>> my Z3801A went into gps week rollover.
>> If you have a Z3801A that had been working properly you might want to
>> check yours.  Different firmware versions roll over at different
>> times.
> My Z3801 seems to be working fine, reporting today as 05 Sep 2016:
> <http://www.kd5byb.net/kd5bybgpscon/gpsstat.htm>
> That said, it had been off for a long time prior to it going back online in December 2014.  When I fired it back up, it did misreport the date until I forced with, the set time command I believe?
> I've never been able to figure out the self-test error.  It keeps working...so I keep using it...  ;)
> 14 years of power-on time...  :)
> thanks much and 73,
> ben, kd5byb
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