First question would be, are you in an area that is broadcasting ATSC 3.0?
I f you are, you need to be aware that only the first two tuners on each device can receive an ATSC 3.0 signal.
These would be identified in your guide with channel #'s in the 100's. i.e. 104.1
So for example your local Fox is 4.1 on ATSC 1.0 and the ATSC 3.0 version is 104.1
Second thing to consider is if both HDHR devices see the same channels you have to figure out how to prioritize the tuners and channels to get what you want by using Tuner priority and favorite channels in the DVR web UI settings.
What happens if you pick 8 shows from the guide all on different channels to start recording at the same time?
