Antenna Heights in Raw Data File

I'm using Carlson 2.09 with my Sokkia RTK system. Why are the antenna heights in the Raw Data file different than the heights entered in the "Equipment Setup" page? I thought they might be adjusting to the antenna phase center but when I manually calculate this value it is off by several cm's.
I have a Sokkia GSR2600 base with a SOK702 antenna and a Radian IS rover. Carlson SurvCe 2.09 on an AllegroCX.
Any comments/information would be helpful
Thanks - John
I have a Sokkia GSR2600 base with a SOK702 antenna and a Radian IS rover. Carlson SurvCe 2.09 on an AllegroCX.
Any comments/information would be helpful
Thanks - John