FIRST, and most importantly, figure out whether she's DishPro or Legacy, andwhether you are the same. If not, don't hook it up to the satellite feed without thinking it through. If you are DP and she's not, you MUST reset the switch matrix, and you will NOT be able to do that and succeed with only one feed cable.
If you're Legacy and she's DP, you're still in trouble.
If you're both the same, hook the feed to tuner #2 (I hear that's better - don't know for sure) and then try to get your OTA.
In ANY event, do NOT run a check switch with only one feed, you'll be hung up until you get to a 2-feed location and reset the box.