[time-nuts] Getting my Rockwell D200 GPS to work

[Don Lewis]

Thanks, Bill, for the thoughts.

I am running both the GPS and the antenna of the USB.  It shows ~4.9Volts.

Maybe I need to use a separate power supply.

There is 4.9V on the center terminal of the antenna connector.  Maybe I am
current-limiting the USBbus.

Thanks for the tips on the eBay antennas... I'll see if I need one.

-Don



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-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of WB6BNQ
Sent: Friday, January 06, 2012 7:28 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Getting my Rockwell D200 GPS to work

Hi Don,

Among the other comments presented it seems the presumed antenna current
might be
a little low compared to others.  That is, the additional 10 milliamps seems
a
little low for an active antenna.

I would suggest trying to read the voltage on the antenna coax line to see
if it
is proper.  It is possible that the antenna is not working properly or it
might
not be an active antenna or it may not have enough gain.  In that case you
would
need another antenna to test that theory.  But you would need to have the
antenna
outside with good sky view and wait for 30 minutes or so to find out.

I would suggest looking at a proper outside antenna like ones in eBay ADs #
270884223800 or # 130603281022.  A friend of mine bought one like these and
had
good luck with it.

The fact that you can get data out of the GPS receiver would suggest that it
is
ok.  Good luck with your project.

Bill....WB6BNQ


Don Lewis wrote:

> Can someone please give me some pointers (my first time with a GPS
module).
>
>
>
> A little hand-holding, pls.
>
>
>
> I bought three of these Rockwell D200 GPS receivers. (It's little GPS PWB
> with an antenna connector and pins for connecting to the RS232- PC)
>
>
>
> All three 'appear' to work the same way (no apparent capture of
satellites).
>
>
>
> Here's what I have:
>
>
>
> 1.      VisualGPS installed and running.
> 2.      A small USB-RS232 card installed and appears to be operational.
> 3.      Small GPS active antenna plugged in.
> 4.      VisualGPS monitor just repeatedly displays:
> $GPGGA,,,,,,0,00,,,,,,,*66
> 5.      I think I understand this to be NMEA code to mean no satellites
have
> been acquired.
> 6.      The Rockwell D200 draws ~180ma (5V) with no antenna and ~190ma
with
> the small active antenna plugged in.
>
>
>
> What am I doing wrong?  Other than maybe cheap china gps' and antenna???
> But it is what I could afford and thought it would be cheap to learn on.
>
>
>
> Thanks for your help.
>
>
>
> -Don
>
>
>
>
>
>
>
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