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, 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.

Costs range from $100 to $500, depending on the issue, parts needed, and labor.

There aren’t any guarantees that the TV antenna you purchase and install will provide perfect reception. Much depends on your distance from broadcasting towers, any nearby obstructions, and typical weather. However, doing some research minimizes the risk of disappointment.

You can speak to neighbors to understand their setup. Various online tools allow you to check how far you are from TV transmitters in your area. The Federal Communications Commission, for example, has a tool enabling you to check local Digital TV channel reception.

Selecting the right type of antenna for your situation and having it properly positioned and installed will also increase the chances of better reception.