Shaun McLaughlin wrote:
I have a problem with my GPSNAV (model 20 I believe, with the external
antenna). The GPSNAV output to the screen works fine, directs me to the
waypoints etc. This shows that the GPS engine is working.

However, the output to the PDA via the serial port, and the Datacom output
to the L-Nav seems to be doing nothing. The cables are definitely OK.

I am unable to find a .cai trace on the logger after a flight, output to
the PDA is hugely intermittant- it works for a few seconds at most over a
whole flight. The L-Nav reads GPS (Wait).

Has anyone else experienced similar problems?

I have has *exactly* the same problem with my LNAV-GPS20 setup. I
finally gave up and bought a Garmin Vista GPS to run my PDA. I would be
very interested in any solutions to this problem. I know the GPS20 is
internally working fine because on its readout all information is
correct. I just can't get a signal from the GPS20 DB9 output to run my PDA.

-Doug