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You will either need to download the MiniTiouner PC software - more details here: https://wiki.batc.org.uk/MiniTioune_software
Or you could make up a Ryde receiver (It's just a RPi 4 - you can buy the SD card from the BATC shop). Details here https://wiki.batc.org.uk/Ryde_Receiver
Then you need to decide where the DATV signals are that you want to watch - terrestrial or QO100 satellite - and set up an aerial or dish to receive them.
Hope this helps
Noel - G8GTZ