How do I split a TV aerial line?

Just got a new TV which has integrated freeview, so the old freeview box went to the upstairs TV. Only problem is, it uses the old aerial, and so cannot recieve digital TV. Is there any way to provide both TVs with good digital signal from our new aerial, such as a line splitter. Post me some URLs of sites where you can get them also, thanks guys :)How do I split a TV aerial line?
.They have them at radio shack stores and on line.

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