The easy way:
sudo apt-get install me-tv
Select the "US NTSC xxxxxx" frequency file and do a scan.
The hard way
Install the Linux Digital Video Broadcast (DVB) applications:
sudo apt-get install dvb-apps w-scan vlc mplayer
Change into the /lib/firmware folder:
sudo wget http://steventoth.net/linux/hvr1400/xc3028L-v36.fw
Create Channels for USA:
scan /usr/share/dvb/atsc/us-NTSC-center-frequencies-8VSB -o zap -a 0 | tee ~/channels.conf
You will get a bunch of "WARNING" messages.. Dont panic this is just the program letting you know it couldnt find content on that channel (it scans all known US frequencies for TV channels)
Just a quick note here as using this device was actually my first time watching Broadcast HDTV. Using the included antenna is absolutely terrible and you will find the video breaking up constantly unless you are sitting on the transmission tower. Unlike analog television of years ago, you will either get crystal clear picture or nothing at all. If you are serious about using this for on the go tv, get a good portable antenna (if you find one let me know).