[time-nuts] Z3801A EFC error

Azelio Boriani azelio.boriani at screen.it
Mon Jan 9 12:58:49 UTC 2012


I was able only to find the pinout for the Furuno GT74 GPS.

On Sun, Jan 8, 2012 at 9:50 PM, Said Jackson <saidjack at aol.com> wrote:

> I found the gt74 gps to be lacking in performance in my Z3815. Sorry, no
> data sheet for it.
>
> I simply cut the 1pps output cable, and spliced a ublox receiver 1pps
> output into it. Then I split the antenna feed to both gps and found 3.3V
> somewhere for the ublox gps.
>
> Works like a charm, z3815 firmware is happy talking to the Furuno, but
> timing and sensitivity is much better now from the ublox.. Even with a
> navigation receiver. Sorry, don't remember what pins where 1pps or power,
> but that's easy to find with a multimeter.
>
> Btw: the Z3815 output is very noisy for some reason. Hp did not do a good
> job on utilizing the E1938 performance here...
>
> Said
>
>
>
>
> On Jan 8, 2012, at 11:22, Magnus Danielson <magnus at rubidium.dyndns.org>
> wrote:
>
> > On 01/02/2012 09:28 PM, Azelio Boriani wrote:
> >> On the usual paybay site there are available some Z3815 with the E1938
> >> oscillator. I have bought one and found the shielding of the Furuno GT74
> >> GPS heavily rusted. Fortunately it is perfectly working and the seller
> says
> >> all are that way. It was the only item found with that type of OCXO.
> >
> > I have found very little information on the Furuno GT74 receiver. Anyone
> having the usal manual stuff for it?
> >
> > Cheers,
> > Magnus
> >
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