Television digital channel definition

Simple question: Openhab using Samsung TV Binding, (all recent versions) in a sitemap using TV_Channel to select a channel. Mapping allows me to select a basic channel just fine BUT I am unable to find a way to define the digital version of a basic number. Like Channels 10.1, 10.2, 10.3. I can change channels 10, 13, 28 and etc. It doesn’t recognize the .#. BTW open air reception.