Signal GH is a tool for users of the HDHomerun networked digital TV tuner who want to monitor and improve their Over The Air (OTA) reception quality. It displays the signal quality from multiple channels simultaneously, allowing the user to more rapidly adjust and upgrade the OTA receiving hardware for his home, i.e., cables, connections, splitters, pre-amps, and antennas.
You cannot use this software to watch video on your AppleTV. This is a diagnostic tool.
The tvOS version of this app will attempt to retrieve a description of the programming available for the selected tuner. This information may be unavailable if the tuner is in use.
If you don't have an HDHomerun, you don't need this product. If you do have an HDHomerun, and use it for over the air reception, you will likely find it useful.
I recommend you go to the setting page and perform a scan of all your local channels. If a channel you know to exist isn't found, you can manually select it from the grid of channels.
Signal GH does not support QAM (digital cable) Please make sure your HDHomerun is set to use a broadcasting channel set and not a cable channel set.