[time-nuts] Fun with the Z3815

Azelio Boriani azelio.boriani at screen.it
Sat Aug 11 22:00:59 UTC 2012

Of course, but they say that there is a DC continuity from the N connector
downto the Furuno receiver: this is very strange. These the exact words:

>DC is making it through
> to the antenna amp, and there is continuity along the whole route from
> N-connector to the Furuno GPS receiver input.

Very strange also because the inductor will prevent the receiver from
getting any signal. Another strange thing: I haven't never saved any survey
in my Z3815A and I have seen that in case of a power cycle the survey is
repeated. The faulty Z3815A seems always acquiring and never tracking:
maybe a Furuno clock problem? What can prevent a GPS receiver to enter the
tracking state?

On Sat, Aug 11, 2012 at 10:03 PM, Christopher Brown <cbrown at woods.net>wrote:

> On 8/11/12 4:16 AM, Azelio Boriani wrote:
> >
> > Very strange the inductor on the antenna cable: my Z3815A has a capacitor
> > also because there is a different power for the antenna and I suspect
> that
> > you have a short between the Furuno antenna power and the Z3815A antenna
> > power.
> >
> Think you looking at different things.
> There should be an inductor at the DC injection point, connecting to the
> signal line.  And a cap as a DC block twards the receiver in-line with it.
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