diff --git a/script/RFscan/ShottkyScan.py b/script/RFscan/ShottkyScan.py
index 1c36c99..a5c34aa 100644
--- a/script/RFscan/ShottkyScan.py
+++ b/script/RFscan/ShottkyScan.py
@@ -46,5 +46,6 @@ caput("SINEG01-RSYS:CALC-VSUM-PHASE-OFFSET", phase_offset)
 #set_return(50.0)
 y = r.getReadable(0) 
 x = r.getPositions(0) 
+y = [v.mean for v in y]
 index_max = y.indexOf(max(y)) 
 _=x[index_max]
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