diff --git a/src/toolbox_scs/detectors/digitizers.py b/src/toolbox_scs/detectors/digitizers.py
index 58b35826e3964ab106283700ff96359a741e54d7..828f5a5754b55173409881ef4c321faa0cadadfd 100644
--- a/src/toolbox_scs/detectors/digitizers.py
+++ b/src/toolbox_scs/detectors/digitizers.py
@@ -447,6 +447,7 @@ def find_peak_integration_parameters(run, mnemonic, raw_trace=None,
         params = integParams.copy()
 
     # extract pulse ids from the parameters (starting at 0)
+    pulse_ids_params = None
     if hasattr(params['pulseStart'], '__len__'):
         if params.get('npulses') is not None and (
                     params.get('npulses') != len(params['pulseStart'])):
@@ -456,10 +457,10 @@ def find_peak_integration_parameters(run, mnemonic, raw_trace=None,
         params['npulses'] = len(params['pulseStart'])
         pulse_ids_params = ((np.array(params['pulseStart']) -
             params['pulseStart'][0]) / pulse_period).astype(int)
-    else:
-        pulse_ids_params = np.arange(0,
-            params['npulses'] * params['period'] / pulse_period,
-            params['period'] / pulse_period).astype(int)
+    elif 'npulses' in params and 'period' in params:
+            pulse_ids_params = np.arange(0,
+                 params['npulses'] * params['period'] / pulse_period,
+                 params['period'] / pulse_period).astype(int)
 
     # Extract pulse_ids, period and npulses from bunch pattern
     pulse_ids_bp, npulses_bp, period_bp = None, None, 0
@@ -482,6 +483,12 @@ def find_peak_integration_parameters(run, mnemonic, raw_trace=None,
                 else:
                     period_bp = np.unique(periods)[0] * pulse_period
     # Compare parameters with bunch pattern
+        if pulse_ids_params is None:
+            params['npulses'] = npulses_bp
+            params['period'] = period_bp
+            pulse_ids_params = np.arange(0,
+                 params['npulses'] * params['period'] / pulse_period,
+                 params['period'] / pulse_period).astype(int)
         if len(pulse_ids_params) == len(pulse_ids_bp):
             if not (pulse_ids_params == pulse_ids_bp - pulse_ids_bp[0]).all():
                 log.warning('The provided pulseStart parameters do not match '