HD tuner same as digital tuner?

[collin]

I have line of sight to repeater antennas but 70 miles over the cascades mountains to the Portland, OR Digital broadcasts. Will I be able to get HDTV broadcast on my visio 37"? It has a coax input for my antenna which the manual calls the DTV/TV port. Does this TV have a HD tuner or just a digital tuner? Is there a difference?
Will I benefit from a new antenna? As of right now our tv picture looks like our old analog tv picture just 37 inches instead of 19 inches.

[ngarrang]

The Vizio LCD TVs have an ATSC tuner in them. This means they can tune in the digital TV broadcasts. For many manufacturers, HD Tuner = Digital Tuner, especially to the average consumer that doesn't know much about TVs.

Just plug your current antenna into the Vizio and see what happens. You may need to consider a signal booster given your distance and the mountains.

Remember to re-scan for your channels. Check out the video settings for what the TV will do with NTSC (4:3) images. You can tell it to do nothing, leaving black areas on either side of the image, expand, etc.