Ya you can but DD using MPEG - 2 tech & most of channels are MPEG - 4 (DVB - S / S2) / HD channels. You mostly add mpeg - 4 channels (d2h is exception for FTA receiver about adding channels). If you store any MPEG - 4 fta channel you can just hear sound of the channel & no picture.
D2H box dosnt add test mode channels while its in test mode in it's channel list. Its my experience. Lets see if anybody get channel even channel in test mode.