diff --git a/src/nqrduck_spectrometer/base_spectrometer.py b/src/nqrduck_spectrometer/base_spectrometer.py
index 6d87e2e..7567916 100644
--- a/src/nqrduck_spectrometer/base_spectrometer.py
+++ b/src/nqrduck_spectrometer/base_spectrometer.py
@@ -13,13 +13,11 @@ class BaseSpectrometer(Module):
 
     @property
     def pulse_program(self):
-        """Pulse program of the spectrometer."""
-        raise NotImplementedError
-
-    def start_measurement(self):
-        """Starts the measurement."""
+        """Pulse program of the spectrometer.
+        """
         raise NotImplementedError
     
     def set_active(self):
-        """Sets the spectrometer as the active spectrometer."""
+        """Sets the spectrometer as the active spectrometer.
+        """
         self.change_spectrometer.emit(self._model.name)
diff --git a/src/nqrduck_spectrometer/base_spectrometer_controller.py b/src/nqrduck_spectrometer/base_spectrometer_controller.py
new file mode 100644
index 0000000..c628345
--- /dev/null
+++ b/src/nqrduck_spectrometer/base_spectrometer_controller.py
@@ -0,0 +1,11 @@
+from nqrduck.module.module_controller import ModuleController
+
+class BaseSpectrometerController(ModuleController):
+
+    def __init__(self, module):
+        super().__init__(module)
+
+    def start_measurement(self):
+        """Starts the measurement.
+        """
+        raise NotImplementedError
\ No newline at end of file
diff --git a/src/nqrduck_spectrometer/controller.py b/src/nqrduck_spectrometer/controller.py
index d69ee76..ff99659 100644
--- a/src/nqrduck_spectrometer/controller.py
+++ b/src/nqrduck_spectrometer/controller.py
@@ -1,15 +1,23 @@
 import logging
+from PyQt5.QtCore import pyqtSlot
 from nqrduck.module.module_controller import ModuleController
 from nqrduck.core.main_controller import MainController
 from nqrduck_spectrometer.base_spectrometer import BaseSpectrometer
 
 logger = logging.getLogger(__name__)
 
+
 class SpectrometerController(ModuleController):
+    """This class is the controller for the spectrometer module."""
+
     def __init__(self, module):
+        """This method initializes the controller.
+        :param module: The module that this controller belongs to.
+        """
         super().__init__(module)
 
     def _load_spectrometer_modules(self):
+        """This method loads the spectrometer modules and adds them to the spectrometer model."""
         # Get the modules with entry points in the nqrduck group
         modules = MainController._get_modules()
         logger.debug("Found modules: %s", modules)
@@ -17,18 +25,43 @@ class SpectrometerController(ModuleController):
         for module_name, module in modules.items():
             # Check if the module instance is a spectrometer by checking if it inherits from BaseSpectrometer
             if not issubclass(type(module), BaseSpectrometer):
-                logger.debug("Module is not a spectrometer: %s ... skipping", module_name)
+                logger.debug(
+                    "Module is not a spectrometer: %s ... skipping", module_name
+                )
                 continue
 
             # Import the module
             logger.debug("Loading spectromter module: %s", module_name)
-            module.model.widget_changed.connect(self._module.view.on_spectrometer_widget_changed)
+            module.model.widget_changed.connect(
+                self._module.view.on_spectrometer_widget_changed
+            )
             logger.debug("Adding spectrometer to spectrometer model: %s", module_name)
             self._module.model.add_spectrometers(module_name, module)
-        
+
         self._module.view.create_menu_entry()
 
+    def process_signals(self, key: str, value: str):
+        if key == "start_measurement":
+            self.on_measurement_start()
+
     def on_loading(self):
-        self._module.model.spectrometer_added.connect(self._module.view.on_spectrometer_added)
-        self._module.model.active_spectrometer_changed.connect(self._module.view.on_active_spectrometer_changed)
-        self._load_spectrometer_modules()
\ No newline at end of file
+        """This method is called when the module is loaded.
+        It connects the signals from the spectrometer model to the view.
+        """
+        self._module.model.spectrometer_added.connect(
+            self._module.view.on_spectrometer_added
+        )
+        self._module.model.active_spectrometer_changed.connect(
+            self._module.view.on_active_spectrometer_changed
+        )
+        self._load_spectrometer_modules()
+
+    def on_measurement_start(self):
+        """This method is called when a measurement is started.
+        It calls the on_measurement_start method of the active spectrometer.
+        """
+        logger.debug(
+            "Measurement started with spectrometer: %s",
+            self._module.model.active_spectrometer,
+        )
+        self._module.model.active_spectrometer.controller.start_measurement()
diff --git a/src/nqrduck_spectrometer/model.py b/src/nqrduck_spectrometer/model.py
index 55389af..2d19999 100644
--- a/src/nqrduck_spectrometer/model.py
+++ b/src/nqrduck_spectrometer/model.py
@@ -16,6 +16,8 @@ class SpectrometerModel(ModuleModel):
 
     @property
     def active_spectrometer(self):
+        """The currently active spectrometer. This is the one that is currently being used.
+        """
         return self._active_spectrometer
     
     @active_spectrometer.setter
@@ -25,11 +27,14 @@ class SpectrometerModel(ModuleModel):
     
     @property
     def available_spectrometers(self):
+        """A dictionary of all available spectrometers. The key is the name of the spectrometer and the value is the module.
+        """
         return self._available_spectrometers
     
     def add_spectrometers(self, spectrometer_module_name, module):
         self._available_spectrometers [spectrometer_module_name] = module
         logger.debug("Added module: %s", spectrometer_module_name)
         self.spectrometer_added.emit(module)
+        self.active_spectrometer = module