I have found Dish networks site to have every answer I have ever needed...
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www.dish.com/technology/ ··· eceiversquote:
Solo ViP® 211k
Supports one independent HDTV with remote control
Compatible with Tailgaterâ¢
View over-the-air SD and HD broadcasts (requires optional over-the-air module).
On-screen Caller ID with history (optional).
1) It makes no difference if the HD is attached.
2) It is not a DVR receiver so I don't believe the USB can be used.
3) It requires the optional OTA module as noted above from Dish.
5) Best to ask Dish to make sure of any charges - their chat functions is quite good and can be used to verify all of the above as well.
There are reviews on Amazon...:
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www.amazon.com/DISH-Netw ··· vip+211k