freeview dvdr tv connection

I have a RDRH X D560 DVDR with intergral freeview tuner connected to my sony tv. I gave away my old freeview box (silly me) thinking all I needed was this machine for everything. Now I realise I cannot watch a different freeview channel whilst recording. I believe that I can get another freeview box and connect this and it should sort the problem Is this correct and if so how would I connect it?