This evaluation is not done by the easyTRX itself, but by the PC or plotter. The easyTRX is only very complex regard to high frequency data reception. There are ca. 45 different navisoftwares world wide. Unfortunately it can not basically be said if your own C-Map version is compatible to AIS or not. Generally C-Map is compatible to AIS since two years.
Please check out www.c-map.com to ask whether your Version is compatible to AIS.