Yes sure,it is possible as I am observing little lower signals as compare to other DVBS2 tps (10970 & 11510) in rainy & bad weather. Here in my loc signals is coming slight lower on tp 11470.
Btw : can u check other DVBS2 tp signals (10970-H-3000-5/6 & 11510-H-30000-5/6)