diff --git a/notebooks/FastCCD/Characterize_Darks_NewDAQ_FastCCD_NBC_New_Common_Mode.ipynb b/notebooks/FastCCD/Characterize_Darks_NewDAQ_FastCCD_NBC_New_Common_Mode.ipynb
index 33242e8d5c28f601d8d2069de5334c519f45f2c1..b72c092174d599bfd474bca09b7a3a48c6ebbbb8 100644
--- a/notebooks/FastCCD/Characterize_Darks_NewDAQ_FastCCD_NBC_New_Common_Mode.ipynb
+++ b/notebooks/FastCCD/Characterize_Darks_NewDAQ_FastCCD_NBC_New_Common_Mode.ipynb
@@ -41,7 +41,7 @@
     "\n",
     "number_dark_frames = 0 # number of images to be used, if set to 0 all available images are used\n",
     "# The two operation modes for FastCCD have fixed names which cannot be changed:\n",
-    "operation_mode = \"FF\" # FS stands for frame-store and FF for full-frame opeartion. \n",
+    "operation_mode = \"FF\"  # FS stands for frame-store and FF for full-frame operation. \n",
     "temp_limits = 5 # to find calibration constants later on, the sensor temperature is allowed to vary by 5 units\n",
     "bad_pixel_offset_sigma = 5. # Any pixel whose offset is beyond 5 standard deviations, is a bad pixel\n",
     "bad_pixel_noise_sigma = 5. # Any pixel whose noise is beyond 5 standard deviations, is a bad pixel\n",
@@ -60,8 +60,7 @@
     "ADU_to_electron_upper_mg = 23.4 # for upper hemisphere and medium gain\n",
     "ADU_to_electron_lower_mg = 23.4 # for lower hemisphere and medium gain\n",
     "ADU_to_electron_upper_lg = 49.3 # for upper hemisphere and low gain\n",
-    "ADU_to_electron_lower_lg = 47.3 # for lower hemisphere and low gain\n",
-    "operation_mode = ''  # Detector operation mode, optional"
+    "ADU_to_electron_lower_lg = 47.3 # for lower hemisphere and low gain\n"
    ]
   },
   {