Confused about committing force die for Battle Meditation

By KungFuFerret, in Star Wars: Force and Destiny RPG

Ok so, I'm a little confused by the Duration upgrade for Battle Meditation. It says

"Commit 3 Force Die to sustain the ongoing effects of the power on each affected target while it remains in range."

Is this after you have already activated the power on a previous action, and have thus established what the effects are? Because without doing that, I'm not really sure how you would determine what effects would be ongoing.

It's done after successfully activating the power. So like, you activate the power with your check, and then immediately commit your Force dice (that same turn).

Ah, ok, I thought that was what they meant? But the description, and the podcast were confusing to me. Thanks.