diff --git a/notebooks/DynamicFF/Characterize_DynamicFF_NBC.ipynb b/notebooks/DynamicFF/Characterize_DynamicFF_NBC.ipynb
index ef9a5e27f60fd33e4a929c134e1469a467b0e136..40e958da1bebb0c45566fc6fe31843955ae779c1 100644
--- a/notebooks/DynamicFF/Characterize_DynamicFF_NBC.ipynb
+++ b/notebooks/DynamicFF/Characterize_DynamicFF_NBC.ipynb
@@ -22,14 +22,14 @@
     "metadata_folder = \"\"  # Directory containing calibration_metadata.yml when run by xfel-calibrate\n",
     "run_high = 1 # run number in which dark data was recorded, required\n",
     "run_low = 2 # run number in which flat-field data was recorded, required\n",
-    "operation_mode = \"TI_DynamicFF\"  # Detector operation mode, optional (defaults to \"TI_DynamicFF\")\n",
+    "operation_mode = \"DynamicFF\"  # Detector operation mode, optional (defaults to \"TI_DynamicFF\")\n",
     "\n",
     "# Data files parameters.\n",
     "karabo_da = ['-1'] # data aggregators\n",
     "karabo_id = \"SPB_MIC_HPVX2\" # karabo prefix of Shimadzu HPV-X2 devices\n",
     "\n",
     "# Database access parameters.\n",
-    "cal_db_interface = \"tcp://max-exfl-cal001:8021\"  # calibration DB interface to use\n",
+    "cal_db_interface = \"tcp://max-exfl-cal001:8021\"  # Unused, calibration DB interface to use\n",
     "db_output = True # if True, the notebook sends dark constants to the calibration database\n",
     "local_output = True # if True, the notebook saves dark constants locally\n",
     "\n",
@@ -61,7 +61,6 @@
     "from cal_tools.step_timing import StepTimer\n",
     "from cal_tools.tools import (\n",
     "    get_dir_creation_date,\n",
-    "    get_random_db_interface,\n",
     "    get_report,\n",
     "    save_dict_to_hdf5,\n",
     "    run_prop_seq_from_path,\n",
@@ -79,16 +78,12 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "cal_db_interface = get_random_db_interface(cal_db_interface)\n",
-    "print(f'Calibration database interface: {cal_db_interface}')\n",
-    "print()\n",
-    "\n",
     "cc = calibration_client()\n",
     "pdus = cc.get_all_phy_det_units_from_detector(\n",
     "    {\"detector_identifier\": karabo_id})\n",
     "\n",
     "if not pdus[\"success\"]:\n",
-    "    raise ValueException(\"Failed to retrieve PDUs\")\n",
+    "    raise ValueError(\"Failed to retrieve PDUs\")\n",
     "\n",
     "detector_info = pdus['data'][0]['detector']\n",
     "detector = ShimadzuHPVX2(detector_info[\"source_name_pattern\"])\n",
@@ -164,7 +159,7 @@
     "\n",
     "    # process\n",
     "    step_timer.start()\n",
-    "    dark = dffc.process_dark(images_dark)\n",
+    "    dark = dffc.process_dark(images_dark)  # Amounts to a per-pixel mean right now.\n",
     "\n",
     "    # put results in the dict\n",
     "    module_constants = constants.setdefault(meta[\"db_module\"], {})\n",