[time-nuts] Jupiter GPS receiver

Mike Seguin n1jez at verizon.net
Mon Jan 2 17:42:02 EST 2006

Can someone point me to the source where the"known fault" of the Jupiter
listed below is documented??

I have a bunch of these engines and would like to see this documentation.


Mike, N1JEZ
"A closed mouth gathers no feet"

----- Original Message ----- 
From: "Bjorn Gabrielsson" <bg at lysator.liu.se>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Sunday, January 01, 2006 4:57 PM
Subject: Re: [time-nuts] Jupiter GPS receiver

"Geoff" <geoff36 at gmail.com> writes:

> "Didier Juges" wrote:
> > I am planning to let the GPS receiver run a while longer to see if it
> > corrects itself at some point, and if it does not, I'll reboot it.
> Hello Didier,
> The Jupiter GPS receiver (if used in NMEA and not binary mode) has a known
> fault, that it can be 1 or 2 seconds delta to UTC, this is independent of
> the "leap-second" situation.

Hi Geoff!

This afternoon, :-( ,I got an opportunity to run my jupiter in binary
mode again. It had been running in NMEA mode, when switched to binary
it was 2 seconds late in binary mode. But had bit set saying that
'time mark not valid' After some 15 minutes it ran ok again, still
do.  First strange behaviour I have seen in binary mode. Regret
missing the leap second, but I would not be surprised if my jupiter
would have shown problems.

Anybody running a jupiter in binary mode over the event?


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