It does have a HDMI in port, which is unusual. Is this to allow you to record from another HDMI source, onto an internal hard drive?
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No.
It is probably an HDMI switch (2x1).
If the TV has only one external port HDMI, you connect the DB820 in this and the tuner will connect the DVD or a game console.
At the time the DB7020Si had a similar entry (with 2 SCART in/out), allowed switch the tuner with an external video source and watch this on TV.
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No.
Seguramente sea un conmutador HDMI (2x1).
Si la TV solo tiene un puerto externo HDMI, conectas la DB820 en este y al sintonizador le conectas el DVD o una consola de juegos.
En su momento la DB7020Si tenia una entrada similar (con 2 Euroconectores in/out), permitia conmutar el sintonizador con una fuente externa de video y ver esta en la TV.