Would anyone know if i can use dvd button on remote control to operate my humax 9300t , i tried the 2 humax dvd codes but no joy(obviously not a dvd player). If i can, would anyone know the 4 digit code?. Thanks

No. It is a different category of device to a DVD player. If this is important to you then you should look at getting a universal remote control from Harmony or One For All.