[App_rpt-users] proper stanza

Good day, hopefully a quick question. Downloaded the current available img for the RaspberryPI3 from the AllStarLink website, when setting up my node I was attempting to use the rxchannel=Radio/usbxxxxx stanza in rpt.conf. checking the asterisk console i see this [Jul 1 00:34:22] WARNING[1296]: channel.c:3051 ast_request: No channel type registered for 'Radio' [Jul 1 00:34:26] NOTICE[1271]: app_rpt.c:22032 rpt_master: RPT thread restarted on 27837 [Jul 1 00:34:26] WARNING[1271]: app_rpt.c:22044 rpt_master: -- Re-Loading config for repeater 27837 What am I missing.. Rich W6ABJ