This was posted in the tvheadend forums. According to a couple users.it comes with a EPG grabber that can get EPG from atsc ota signal (US), PSIP ATSC grabber. Which is not included in the main build. Have not gotten it to work with the instructions that were given. It installs but something missing, when I try to log in the web GUI I get a bunch of red text errors in putty. This is what I used to install , hopefully can tell me how to compile it and make it work. Trying to install it on pi.
sudo wget https://github.com/laurimyllari/tvheadend/archive/atsc-epg.zip
sudo unzip atsc-epg.zip
sudo rm atsc-epg.zip
cd tvheadend-atsc-epg
sudo apt-get update
sudo -s apt-get install git build-essential pkg-config libssl-dev dvb-firmware-osmc dvb-tools libdvbv5-0 liburiparser-dev liburiparser1 libavahi-client-dev zlib1g-dev libavcodec-dev libavutil-dev libavformat-dev libswscale-dev
sudo ./configure
sudo make
sudo make install