"Steve" wrote in message
...
Isn't NMEA 0183 going to be the same for both the GPS and the Flux Gate..

I have the Serial port set at 4800, 8 bit, no parity and one stop bit.
That
works fine with any of the three GPS I have available..

I leave these setting and connect the port to the Flux Gate Compass and
get
nothing.. In the absence of info otherwise, I would have to assume that
it's
output would be this standard output for NMEA 0183..

It appears (or I haven't found) any control over these out put setting
from
the Flux Compass. The only NMEA 0183 info in the manual has to do with the
two data lines on the DIN connector: SIGNAL and RETURN Data Output.

In the specifications it states: DATA OUTPUT-- NMEA 0183: HCHDM(heading),
HCBOD(course), HCXTR(deviation).

Still wondering ??

Chances are that the output of the fluxgate IS NMEA, but the voltage level
is incorrect. The GPS has an RS-232 output but the fluxgate is probably at
NMEA level (0V and 5V). This is outside the specs of RS-232 and whether a
serial port on a computer will read that is a matter of coincidence.

Meindert