what is the 3h, 4h 5l stand for with the limbs and where is this info found?
It's the deflection of the limbs. The higher the # the more poundage you can get out of them but it's different from cam to cam and bow model to bow model.
2009 models: http://www.martinarchery.com/tech2009.php
Past year models: http://www.martinarchery.com/pastspecs.php