April 19, 2009 15:36
The GPS is 'talking' on two conductors, (a) grd, (b) data out.
The VHF and the 'serial to USB' are both listeners. One 'talker' can can supply numerous 'listeners'. One potential issue is ground loops but if all the units are supplied power by the same 12VDC system on your boat (or are self powered/battery) then it is a non-problem 99.99% of the time. just twist the wires together and go. the trick is to have the manuals with the connector pinouts for the devices involved.
(1) Data grd for all three devices twisted together.
(2) GPS data out twisted to the 'data In' of both the VHF and the Serial to USB DB-9 plug.
Note: The exact names of the pins/wires/conductors may vary.
The VHF and the 'serial to USB' are both listeners. One 'talker' can can supply numerous 'listeners'. One potential issue is ground loops but if all the units are supplied power by the same 12VDC system on your boat (or are self powered/battery) then it is a non-problem 99.99% of the time. just twist the wires together and go. the trick is to have the manuals with the connector pinouts for the devices involved.
(1) Data grd for all three devices twisted together.
(2) GPS data out twisted to the 'data In' of both the VHF and the Serial to USB DB-9 plug.
Note: The exact names of the pins/wires/conductors may vary.