EA is offering anyone with who owns Premium for any of the console versions of Battlefield 4 access to the game’s Community Test Environment on PC.
Because the Community Test Environment is only available on PC, your Premium membership on PlayStation 3, PlayStation 4, Xbox 360 or Xbox One will net you access to it on PC.
All you need to do is register using your Origin credentials through this link. You will then have to download the Origin client on your PC and download the CTE client through there. You don’t need to own a copy of the game on PC either.
The Community Test Environment gives players early access to future additions and alterations that will be made to the core Battlefield game. Players can give feedback and help tweak settings or remove bugs.