Looking at the Roamio basic (I'm using an antenna rather than cable).
Want to connect a Mini for another TV in the house. It would use the existing coax between where the Roamio will be located and where the other TV and Mini are located.
The specs for the Roamio basic says
Coax/MoCA bridge Requires adaptor
What kind/where do you get the appropriate adaptor?
It will be a dedicated coax just between the Roamio and the Mini.
It's not feasible to pull a Ethernet cable between the two and the documentation suggests that a WiFi network isn't up to the task.