diff --git a/Scripts/Spin_Alignment/spinal_exp.py b/Scripts/Spin_Alignment/spinal_exp.py
index 214222e..f7a2f7d 100644
--- a/Scripts/Spin_Alignment/spinal_exp.py
+++ b/Scripts/Spin_Alignment/spinal_exp.py
@@ -105,7 +105,7 @@ def spinal_experiment(pars, run):
                        
    # 8-step phase cycle (Schaefer et al. J Magn Res A 115 (1995))
     pars['PH1'] = [ 0,   0, 180, 180,  90, 90, 270, 270] # 1st (90-degree) pulse
-    pars['PH3'] = [90, 270,  90, 270, 180, 90, 180,  90] # 2nd (90-degree) pulse
+    pars['PH3'] = [90, 270, 270,  90, 180,  0,   0, 180] # 2nd (90-degree) pulse
     pars['PH4'] = [90]  # 3rd (90-degree) pulse
     pars['PH2'] = [90, 270]  # receiver