diff --git a/simulations/airshower_beacon_simulation/ab_modify_clocks.py b/simulations/airshower_beacon_simulation/ab_modify_clocks.py
index 557a638..b13467c 100755
--- a/simulations/airshower_beacon_simulation/ab_modify_clocks.py
+++ b/simulations/airshower_beacon_simulation/ab_modify_clocks.py
@@ -41,8 +41,6 @@ if __name__ == "__main__":
         print("Antenna file cannot be found, did you try generating a beacon?")
         sys.exit(1)
 
-    print(f"Modifying clocks upto {max_clock_offset}ns.")
-    
     # read in antennas
     with h5py.File(antennas_fname, 'a') as fp:
         if 'antennas' not in fp.keys():
@@ -53,10 +51,27 @@ if __name__ == "__main__":
 
         N_antennas = len(group.keys())
 
-        if True: # uniform
-            clock_offsets = max_clock_offset * (2*rng.uniform(size=N_antennas) - 1)
-        else: # normal
-            clock_offsets = max_clock_offset * rng.normal(0, 1, size=N_antennas)
+        if not True:
+            print(f"Modifying clocks upto {max_clock_offset}ns.")
+            clock_offsets = np.zeros( N_antennas )
+            if not True: # uniform
+                print("Uniform distribution")
+                clock_offsets = max_clock_offset * (2*rng.uniform(size=N_antennas) - 1)
+            else: # normal
+                print("Gaussian distribution")
+                clock_offsets = max_clock_offset * rng.normal(0, 1, size=N_antennas)
+        else: # Hardcoded offsets
+            print("Hardcoded offsets")
+
+            f_beacon = 51.53e-3 # GHz
+
+            clock_offsets = np.zeros( N_antennas )
+            if False:
+                clock_offsets[59] = np.pi/2 / (2*np.pi*f_beacon)
+            elif True:
+                clock_offsets += 1/8 * 1/f_beacon
+            print(clock_offsets)
+
 
         # modify time values of each antenna
         for i, name in enumerate(group.keys()):