I had a c120 unit. I replaced it with a C127 unit. Since the switch my Ray 49 VHF radio had not worked properly, no weather stations , it does not transmit or receive. My question is I have a NMEA cable out the back of the Ray 49 radio. Does this cable need to be connected to the new C127 and if so how and where. Thank you guys AGAIN for your help.
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