PROBLEM SOLVED! The DSD+ plugin saved my day. Looks like my "Input & Output" settings were not correct. And now I am able to copy the digital signals identified as DMR (DCC 6). Now trying to understand the log messages seen on the DSD+ command window and on the DSD+ Event log window. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.