diff --git a/cal_tools/cal_tools/agipdlib.py b/cal_tools/cal_tools/agipdlib.py
index 5622e9e65cd3b2dec9ccf77f86732c77a00c93b9..e2eda82b34f38a74ecc8f21d28629fe5a611a49c 100644
--- a/cal_tools/cal_tools/agipdlib.py
+++ b/cal_tools/cal_tools/agipdlib.py
@@ -25,8 +25,9 @@ def get_num_cells(fname, loc, module):
         return options[np.argmin(dists)]
 
 
-def get_acq_rate(slow_paths: Tuple[str, str],
-                 fast_paths: Tuple[str, str, int]) -> Optional[float]:
+def get_acq_rate(fast_paths: Tuple[str, str, int],
+                 slow_paths: Optional[Tuple[str, str]] = ('', '')
+                 ) -> Optional[float]:
     """Get the acquisition rate from said detector module.
 
     If the data is available from the middlelayer FPGA_COMP device, then it is
diff --git a/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb b/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
index 5296ecc33fade39c8cf48bda9928f644e4820a4d..e906d9921aa33d3f733bc70e47e11b0cb61f442e 100644
--- a/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
+++ b/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
@@ -313,7 +313,7 @@
     "\n",
     "# Evaluate aquisition rate\n",
     "if acq_rate == 0:\n",
-    "    acq_rate = get_acq_rate(('', '') (filename, karabo_id, channel))\n",
+    "    acq_rate = get_acq_rate((filename, karabo_id, channel))\n",
     "else:\n",
     "    acq_rate = None\n",
     "\n",
diff --git a/notebooks/AGIPD/AGIPD_Retrieve_Constants_Precorrection.ipynb b/notebooks/AGIPD/AGIPD_Retrieve_Constants_Precorrection.ipynb
index 99ec430f2501c08a683c02b3415ff3652b14fb6b..8a2ded9840b0484a95478c069917efc61489167d 100644
--- a/notebooks/AGIPD/AGIPD_Retrieve_Constants_Precorrection.ipynb
+++ b/notebooks/AGIPD/AGIPD_Retrieve_Constants_Precorrection.ipynb
@@ -271,7 +271,7 @@
     "                break\n",
     "\n",
     "    if acq_rate == 0.:\n",
-    "        acq_rate = get_acq_rate(('', ''), (f, karabo_id, idx))\n",
+    "        acq_rate = get_acq_rate((f, karabo_id, idx))\n",
     "    else:\n",
     "        acq_rate = None\n",
     "\n",
diff --git a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
index 8f377fe52bf2bae3a16640a3dd88cb2a5fe98bbf..49ec24e1dee2e1a6a9bf2a27ed972954aecbf2fa 100644
--- a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
+++ b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
@@ -51,8 +51,8 @@
     "\n",
     "mem_cells = 0 # number of memory cells used, set to 0 to automatically infer\n",
     "bias_voltage = 300 # detector bias voltage\n",
-    "gain_setting = 0.0 # the gain setting, use 0.1 to try to auto-determine\n",
-    "acq_rate = 1.1 # the detector acquisition rate, use 0 to try to auto-determine\n",
+    "gain_setting = 0.1 # the gain setting, use 0.1 to try to auto-determine\n",
+    "acq_rate = 0. # the detector acquisition rate, use 0 to try to auto-determine\n",
     "interlaced = False # assume interlaced data format, for data prior to Dec. 2017\n",
     "rawversion = 2 # RAW file format version\n",
     "\n",
@@ -462,7 +462,7 @@
     "max_cells = np.max(all_cells)\n",
     "print(f\"Using {max_cells} memory cells\")\n",
     "acq_rate = np.max(all_acq_rate)\n",
-    "print(f\"Using {acq_rate:0.1f} MHz acquisition rate\")"
+    "print(f\"Using {acq_rate} MHz acquisition rate\")"
    ]
   },
   {
diff --git a/notebooks/AGIPD/Characterize_AGIPD_Gain_FlatFields_NBC.ipynb b/notebooks/AGIPD/Characterize_AGIPD_Gain_FlatFields_NBC.ipynb
index 9775a0772ec61ad65ede00b4b3c18d719b27d18b..6c7a36b8f44b6dfabe902d4f38a5ac7504249481 100644
--- a/notebooks/AGIPD/Characterize_AGIPD_Gain_FlatFields_NBC.ipynb
+++ b/notebooks/AGIPD/Characterize_AGIPD_Gain_FlatFields_NBC.ipynb
@@ -189,7 +189,7 @@
     "channel = 0\n",
     "fname = fbase.format(runs[0], runs[0].upper(), channel, sequences[0])\n",
     "if acqrate == 0.:\n",
-    "    acqrate = get_acq_rate(('', ''), (fname, loc, channel))\n",
+    "    acqrate = get_acq_rate((fname, loc, channel))\n",
     "    \n",
     "\n",
     "if mem_cells == 0:\n",
diff --git a/notebooks/AGIPD/Chracterize_AGIPD_Gain_PC_NBC.ipynb b/notebooks/AGIPD/Chracterize_AGIPD_Gain_PC_NBC.ipynb
index 69ca41eb47d3fdccfcc7d782346e32104e4b1373..e137d6ac8c3471f9b4520caa6726248b97a4a9d2 100644
--- a/notebooks/AGIPD/Chracterize_AGIPD_Gain_PC_NBC.ipynb
+++ b/notebooks/AGIPD/Chracterize_AGIPD_Gain_PC_NBC.ipynb
@@ -159,7 +159,7 @@
     "    print('Reading ',fname)\n",
     "    \n",
     "    if acq_rate == 0.:\n",
-    "        acq_rate = get_acq_rate(('', ''), (fname, loc, channel))\n",
+    "        acq_rate = get_acq_rate((fname, loc, channel))\n",
     "        print(\"Acquisition rate set from file: {} MHz\".format(acq_rate))\n",
     "\n",
     "    if mem_cells == 0:\n",
diff --git a/notebooks/AGIPD/playground/AGIPD_SingleM_test_Dark.ipynb b/notebooks/AGIPD/playground/AGIPD_SingleM_test_Dark.ipynb
index 93b63f2cfede86004ca42f67f6f812c8f4795802..f727a1a94440240014378ad353bb276210798570 100644
--- a/notebooks/AGIPD/playground/AGIPD_SingleM_test_Dark.ipynb
+++ b/notebooks/AGIPD/playground/AGIPD_SingleM_test_Dark.ipynb
@@ -260,7 +260,7 @@
     "        cells = get_num_cells(filename, loc, channel)\n",
     "    \n",
     "    if acq_rate == 0.:\n",
-    "        acq_rate = get_acq_rate(('', ''), (filename, loc, channel))\n",
+    "        acq_rate = get_acq_rate((filename, loc, channel))\n",
     "    \n",
     "    thresholds_offset, thresholds_offset_sigma, thresholds_noise, thresholds_noise_sigma = bp_thresh \n",
     "    thresholds_offset_hard = thresholds_offset[gg]\n",