Application: Connecting a USB GPS antenna to a VHF radio to provide position information.
5.1 volts is applied to pins 1 (+) and 4(-) The red LED indicator light comes on the GPS and indicates a position has been obtained
GPS USB 2.0 connector is inserted into RB-Gra-31 USB 3.0 female
I wired pins 2 and 3 to the single wire NEMA0183 input and input wire shield of the VHF radio. I am getting no output. Is there any voltages or resistances that could be checked on pins 2 and 3 to determine if there is any output from your device?
GPS antenna works and via PC I can see the sentences being transferred via the GPS USB input to the PC.
If we understand your situation correctly, you have a NMEA 0183, which would itself use a EIA-422 electrical connection.
From what you explained above, you wired together the VHF radio, the NEMA 0183 1-wire interface and a USB device (through the RB-Gra-31) together?
To get a better idea of your setup, please provide some pictures in your reply showing clearly all components (boards, wires, connections, power sources, etc.). Please annotate pictures as required for clarity.
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As for interface connections, please note that USB and EIA-422 are most likely not compatible (what interface is your VHF radio using?) in the way you are using them and would most likely need something between the two to convert between the two interface formats.
