Sony nxcam hxr nx5e shoots grainy shots

Hie,
'Am new to cameras and stuff and just recently bought a sony nxcam hxr-nx5e camcorder. The problem is; i thought since its an HD camcorder, my footage would appear crystal clear when imported into i.e After Effects, however my footage looks too grainy and not high def.

i've searched around on google for answers on how to get the best quality for editing but to no avail. I've tried changing my capture settings to 1920x1080iFX as well ad 1920x1080p FX but still the footage doesnt look great.

i dont know if its my lack of experience or something am not doing right. Your help will greatly be appreciated since i really need to use the camera to make a living.

Help! anybody! Please!