twistedtree
Guru
I tried this ---- same error. But thanks for the suggestion.
I posted this on TheHullTruth to see if there were others using the radio who experienced same issue. A lot of tips to troubleshoot - there's a guy who seems pretty knowledgeable who is certain the issue is antenna frequency. THe instructions for Vesper Cortex M1 supports his contention: "Choose a high quality omni-directional VHF antenna designed for the marine band (156-162MHz) and ensure it is well tuned at the AIS end of the band (VSWR 2:1 or less at 162MHz)."
The install literature for Simrad is similar to Si-Tex: "Connection to a suitable VHF antenna will be required for the AIS Transceiver to operate. A standard marine band VHF antenna such as that used with VHF voice radios will be sufficient."
I'll ship it tomorrow to Simrad so will know in a couple weeks.
Thanks everyone - Peter
Keep in mind that if an AIS transmitter must have an AIS antenna, then no antenna splitters would work anywhere. Clearly that’s not the case. An AIS antenna will fine tune things, but it doesn’t account for what you are seeing.