AIS650 VSWR Fault Alarm

[Chuck - Raymarine - Moderator]

Welcome back to the Raymarine Forum Tom,

The alarm is reporting that the VSWR of the AIS transceiver's VHF antenna / antenna cable assembly is too high ... check the antenna VSWR using the Diagnostics tab for the ProAIS2/ProAIS application or with a VSWR meter. The reported VSWR of the antenna w/extensions should have a VSWR between 1.0:1 - 2.0:1. Please note that a VSWR value will not be reported until the AIS transceiver attempts to transmit ownship data. Should the VSWR of the antenna w/antenna cable assembly exceed this value, then it may indicate a problem with one or more of the antenna cable's couplers, the antenna cable, the antenna, or the AIS650 itself. Should you not have the required equipment to fault isloate the problem, then you may want to seek the assistance of a Certified Raymarine Installer.

Please additionally note that early versions of AIS650 software would sometimes erroneously sense VSWR levels. You can ensure that your AIS650's software is not responsible for this by ensuring that your AIS650 has been updated with the latest available Raymarine product software update.

Should the AIS650's software be up to date and should the VSWR of the antenna / antenna cable assembly not indicate a fault with the antenna / antenna cable assembly, then it would be recommended that the AIS650 be sent to Raymarine’s Product Repair Center to be bench checked / serviced.