Linkplanner values its ok on this link.
Here are just some of the things to confirm on LINKPlanner:
Is the Receive Power the same as LINKPlanner's estimated Receive Power?
Is the Link Loss the same as LINKPlanner's Total Path Loss?
Is the Range the same?
Is the link operating in the modulation mode that LINKPlanner predicts? Under Performance Details, Details tab, see the Mode with the highest Receive Time in Mode column.
I hope this helps!
Dave