bo.com] On Behalf Of Hal Murray
Sent: Thursday, September 08, 2016 2:54 PM
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] Z3801A gps week rollover
petervince1...@gmail.com said:
> Can I just ask why the Z3801As are having week roll-
The gps rcvr does not have a batter but will indeed support an external
battery.
I attached 2 AA batteries in a external easily replaceable holder and ran
the 2 wires to the receiver 10 pin plug. (At least I think it was 10)
I change the batteries every 2 years not so much for voltage as concern fo
kb...@n1k.org said:
> The bigger problem for NTP is when the leap second correction process is
> thrown off by the âtime warpâ. When leap seconds get fixed in mid-August
> rather than the end of June ⦠not a good thing.
Is that still a problem? If so, do you have any details. I don't kn
On 09/09/2016 01:17 PM, Bob Camp wrote:
Hi
On Sep 9, 2016, at 3:06 AM, Magnus Danielson wrote:
Hi,
On 09/08/2016 11:53 PM, Hal Murray wrote:
petervince1...@gmail.com said:
Can I just ask why the Z3801As are having week roll-over problems now - I
didn't think it was 2048 weeks since GP
Hi
> On Sep 9, 2016, at 3:06 AM, Magnus Danielson
> wrote:
>
> Hi,
>
> On 09/08/2016 11:53 PM, Hal Murray wrote:
>>
>> petervince1...@gmail.com said:
>>> Can I just ask why the Z3801As are having week roll-over problems now - I
>>> didn't think it was 2048 weeks since GPS "zero-hour" until
Hi,
On 09/08/2016 11:53 PM, Hal Murray wrote:
petervince1...@gmail.com said:
Can I just ask why the Z3801As are having week roll-over problems now - I
didn't think it was 2048 weeks since GPS "zero-hour" until late on the 6th
of April 2019?
It's probably 1024 weeks since a date was built in
hol...@hotmail.com said:
> Happy until the next power glitch... the setting does not seem to persist
> between boots. There may also be other conditions that causes it to forget
> your date.
I just power cycled mine. It came back correct without setting the date.
I've assumed there is a tin
That makes sense - thanks guys!
Peter
On 8 September 2016 at 22:53, Hal Murray wrote:
>
> petervince1...@gmail.com said:
> > Can I just ask why the Z3801As are having week roll-over problems now -
> I
> > didn't think it was 2048 weeks since GPS "zero-hour" until late on the
> 6th
> > of
petervince1...@gmail.com said:
> Can I just ask why the Z3801As are having week roll-over problems now - I
> didn't think it was 2048 weeks since GPS "zero-hour" until late on the 6th
> of April 2019?
It's probably 1024 weeks since a date was built into the firmware.
It's like the year 2000 pr
Hi
After the first batch of GPS devices rolled over, the manufacturers came up
with a “fix”
for the problem. If the date came out to a number *before* the firmware was
issued,
it was corrected forward in time. This only works over a single span of GPS
dates.
Depending on when the firmware you
Can I just ask why the Z3801As are having week roll-over problems now - I
didn't think it was 2048 weeks since GPS "zero-hour" until late on the 6th
of April 2019?
Peter
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on 1PPS or 10 MHz outputs.
>
> /tvb
>
> - Original Message -
> From: "paul swed"
> To: "Discussion of precise time and frequency measurement" <
> time-nuts@febo.com>
> Sent: Thursday, September 08, 2016 8:16 AM
> Subject: Re: [time-nuts] Z3
ay be mishandled by some GPS
receivers, but they have no effect on 1PPS or 10 MHz outputs.
/tvb
- Original Message -
From: "paul swed"
To: "Discussion of precise time and frequency measurement"
Sent: Thursday, September 08, 2016 8:16 AM
Subject: Re: [time-nuts] Z3801A g
Mark,
>From some earlier threads on rollovers. Do you even need to set the time at
all?
Granted not great if the 3801 is a time source, but if its just frequency
do you care?
Thanks
Paul
WB8TSL
On Tue, Sep 6, 2016 at 11:30 AM, Mark Sims wrote:
> Happy until the next power glitch... the setting
I had one that screwed up. I power cycled and set the date. It's happy now.
I'm not sure of the exact recipe to tell it the right date. After feeding it
a date of roughly today, the status screen jumped to Jan 2007. After it
found a few satellites and such, it jumped to Sep 2016.
--
The
That would be sunday midnight, GPS time, as GPS time-gears have GPS week
shift between saturday and sunday. This naturally makes Monday extra
monday as the system that fail do it during sunday.
Cheers,
Magnus
On 09/05/2016 06:29 AM, Mark Sims wrote:
I did a little math on the dates and it loo
hol...@hotmail.com said:
> I did a little math on the dates and it looks like the rollover happened in
> the last couple of days...
Thanks for the heads up.
Mine started on Aug 17th
/var/log/ntp/clockstats.20160817:57617 2.033 127.127.26.1
T21997010102300103
8 64 0
That's from ntpd's cl
Hi
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 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 Z380
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