Here's a couple of tips regarding tuning in the signal. I kinda learned this the hard way so I hope it helps. Receivers are not all created equal. Some receive a signal right away and some take several minutes. The DTV receiver I have picks up a signal with minimal searching. We had a picture in seconds. On the other hand, the Hughes receiver takes several minutes to find the signal. On our first outing I only took the Hughes and was totally frustrated and ruined a whole afternoon. We have 2 tvs and a receiver for each. So I've learned to find the signal with the DTV receiver on one tv and then turn on the Hughes and wait several minutes for it to finish searching on the other.
Another thing I found that we don't always receive our local channels when we travel. If we're near our home base and pretty much on the same elevation and azimuth we can get them. But if the azimuth is drastically different we won't get the locals. So before you leave home don't have the receiver tuned to a local channel. Put it on ESPN or some other channel. If you have it tuned to a local channel and you're out of the receiving area for locals the receiver will search and search without finding anything. Some receivers will not allow you to change channels while it's searching. So it's best to have the receiver tuned to a non local channel before heading out. Hope all this helps someone.