Coax cable connects to your television, modem, or cable box. Look for a female coax connection on these devices. Your coax cable will connect to any of these. The other end of the wire runs to the service connection coming into the house.

Yes, they assess geographic and structural factors to recommend suitable models.

Yes, in general, raising your TV antenna will improve your reception. Besides raising the location of your antenna, you should try putting it by a window. In fact, you can have the same antenna but get double the channels or more if it's in the best location. The highest spot to put a TV antenna will be on your roof, and the tallest type of outdoor antenna is a tower.

If you’re having problems with poor reception, here are some simple tips that may help improve the signal and picture quality.

• Consider the position of the antenna: Could it be higher, is it secure, or are nearby obstructions interfering with the signal? For a directional antenna, you may need to reposition it in the direction of the broadcast tower.

• Move any metallic objects: Metal can interfere or block reception, so if you have stainless steel objects or the antenna is near a wrought-iron fence, this could be a problem. Try to keep the antenna at least six feet away from metal objects..

• Cable length: An overly long cable can reduce signal strength. If you don’t need as much cable as you are using, it may be better to exchange it for a shorter one.