I have checked data 2 port settings, all OK, and turned on sentences DPT,GLL,MTW,RMC,VTG.
Multimeter set at 2VDC connected across pin 1 and pin 2 shows 1.0v then at about 1 second intervals shows about .6v (packets of data I guess) When I connect TD-A & TD-B (VX2 data2) to the Blu-yel & Blu-grn on the data converter I get nothing on the FI504.
The FI504 is the only instrument on a N2K backbone, other than 12v in and terminators.
I tried feeding the data back into data 2 and viewing it on the port monitor, it looks OK.
However if I input my Weather Station 0183 data into the data converter it works fine.!!!
I have tried connecting the shields and neg lines but can't get it to work.
What have I missed?