diff --git a/script/RFscan/phase_scan_caqtdm_dv2.py b/script/RFscan/phase_scan_caqtdm_dv2.py
index b855ffb..180645c 100644
--- a/script/RFscan/phase_scan_caqtdm_dv2.py
+++ b/script/RFscan/phase_scan_caqtdm_dv2.py
@@ -82,7 +82,7 @@ print ("Valid fit")
 energy_gain     = energy_max
 phase_offset    = 90 - phase_fit_max
 amplitude_scale = energy_gain / Ampl
-power_scale     = Power / math.pow(V,2)
+power_scale     = Power / math.pow(Ampl,2)
 
 caput(prefix + ":CALC-VSUM-PHASE-OFFSET", phase_offset)
 caput(prefix + ":CALC-VSUM-AMPLT-SCALE" , amplitude_scale)