You have different options. You can use the stand only (without the pole and mount). You can also use just the stand and pole. That's what we did. Our TV sits right on the stand but we use the pole to help organize cables and we ran velcro straps from the pole and attached them to the back of the TV (in case it ever gets a hard bump). You don't have to do that, of course. Most large TVs will hide the post completely, so you won't even see it. Finally, you can also attach the mount to the pole and the back of the TV. That will give you the option to suspend the TV without using its base. The height of the TV will depend upon where the mounting holes are on the back of your TV and the limited height adjustment on the bar. Finally, if you don't use the mounting bracket hardware for that purpose be sure to save it because you can use it to mount another TV to the wall, and it is very sturdy hardware.
If you are asking if you can attach the TV to the mount hardware and still have it sit it on the cabinet on its own base, I think you might have trouble. That's because the mounting bars that attach to the TV can only be moved up and down in set increments. However, even if by chance that happened to work out for you, you would then lose the option to move your TV forward or backward on the cabinet, and it might not sit in accordance to your preferance.