diff --git a/pyrelacs/ui/mainwindow.py b/pyrelacs/ui/mainwindow.py
index a9ade22..a4f0a6a 100644
--- a/pyrelacs/ui/mainwindow.py
+++ b/pyrelacs/ui/mainwindow.py
@@ -22,6 +22,7 @@ from pyrelacs.worker import Worker
 from pyrelacs.repros.repros import Repro
 from pyrelacs.util.logging import config_logging
 from pyrelacs.ui.about import AboutDialog
+from pyrelacs.ui.plots.calibration import CalibrationPlot
 
 log = config_logging()
 _root = path(__file__).parent.parent
@@ -37,14 +38,15 @@ class PyRelacs(QMainWindow):
         )  # Ensure icons are displayed with text
         self.setWindowTitle("PyRelacs")
 
-        self.beat_plot = pg.PlotWidget()
-        self.power_plot = pg.PlotWidget()
+        self.figure = pg.GraphicsLayoutWidget()
 
-        self.beat_plot.addLegend()
-        self.power_plot.addLegend()
-        self.beat_plot.setBackground("w")
-        self.power_plot.setBackground("w")
-        self.power_plot.setLogMode(x=False, y=True)
+        filename = path.joinpath(path.cwd(), "data.nix")
+        if filename.exists():
+            self.nix_file = nix.File.open(str(filename), nix.FileMode.ReadOnly)
+        else:
+            self.nix_file = nix.File.open(str(filename), nix.FileMode.Overwrite)
+
+        self.calibration_plot = CalibrationPlot(self.figure, self.nix_file)
 
         self.threadpool = QThreadPool()
         self.repros = Repro()
@@ -59,20 +61,13 @@ class PyRelacs(QMainWindow):
         self.create_toolbars()
 
         layout = QGridLayout()
-        layout.addWidget(self.beat_plot, 0, 0, 1, 2)
-        layout.addWidget(self.power_plot, 1, 0, 1, 2)
+        layout.addWidget(self.figure, 0, 0, 2, 2)
         layout.addWidget(self.text, 2, 0, 1, 2)
 
         widget = QWidget()
         widget.setLayout(layout)
         self.setCentralWidget(widget)
 
-        filename = path.joinpath(path.cwd(), "data.nix")
-        if filename.exists():
-            self.nix_file = nix.File.open(str(filename), nix.FileMode.ReadOnly)
-        else:
-            self.nix_file = nix.File.open(str(filename), nix.FileMode.Overwrite)
-
     def create_actions(self):
         self._rlx_exitaction = QAction(QIcon(":/icons/exit.png"), "Exit", self)
         self._rlx_exitaction.setStatusTip("Close relacs")
@@ -103,7 +98,7 @@ class PyRelacs(QMainWindow):
         )
         self._daq_calibaction.setStatusTip("Calibrate the attenuator device")
         # self._daq_calibaction.setShortcut(QKeySequence("Alt+d"))
-        self._daq_calibaction.triggered.connect(self.plot_calibration)
+        self._daq_calibaction.triggered.connect(self.calibration_plot.plot)
         self.create_menu()
 
     def create_menu(self):
@@ -166,73 +161,7 @@ class PyRelacs(QMainWindow):
 
         self.plot_calibration_button = QPushButton("Plot Calibration")
         self.plot_calibration_button.setCheckable(True)
-        self.plot_calibration_button.clicked.connect(self.plot_calibration)
-
-    def plot_calibration(self):
-        def decibel(power, ref_power=1.0, min_power=1e-20):
-            """Transform power to decibel relative to ref_power.
-
-            \\[ decibel = 10 \\cdot \\log_{10}(power/ref\\_power) \\]
-            Power values smaller than `min_power` are set to `-np.inf`.
-
-            Parameters
-            ----------
-            power: float or array
-                Power values, for example from a power spectrum or spectrogram.
-            ref_power: float or None or 'peak'
-                Reference power for computing decibel.
-                If set to `None` or 'peak', the maximum power is used.
-            min_power: float
-                Power values smaller than `min_power` are set to `-np.inf`.
-
-            Returns
-            -------
-            decibel_psd: array
-                Power values in decibel relative to `ref_power`.
-            """
-            if np.isscalar(power):
-                tmp_power = np.array([power])
-                decibel_psd = np.array([power])
-            else:
-                tmp_power = power
-                decibel_psd = power.copy()
-            if ref_power is None or ref_power == "peak":
-                ref_power = np.max(decibel_psd)
-            decibel_psd[tmp_power <= min_power] = float("-inf")
-            decibel_psd[tmp_power > min_power] = 10.0 * np.log10(
-                decibel_psd[tmp_power > min_power] / ref_power
-            )
-            if np.isscalar(power):
-                return decibel_psd[0]
-            else:
-                return decibel_psd
-
-        block = self.nix_file.blocks[0]
-        colors = ["red", "green", "blue", "black", "yellow"]
-        for i, (stim, fish) in enumerate(
-            zip(list(block.data_arrays)[::2], list(block.data_arrays)[1::2])
-        ):
-            beat = stim[:] + fish[:]
-            beat_squared = beat**2
-
-            f, powerspec = welch(
-                beat_squared,
-                window="flattop",
-                fs=40_000.0,
-                nperseg=100_000,
-            )
-
-            peaks = find_peaks(powerspec, prominence=0.001)[0]
-            pen = pg.mkPen(colors[i])
-
-            self.beat_plot.plot(
-                np.arange(0, len(beat)) / 40_000.0,
-                beat,
-                pen=pen,
-                name=stim.name,
-            )
-            self.power_plot.plot(f, powerspec, pen=pen, name=stim.name)
-            self.power_plot.plot(f[peaks], powerspec[peaks], pen=None, symbol="x")
+        self.plot_calibration_button.clicked.connect(self.calibration_plot.plot)
 
     def connect_dac(self):
         devices = uldaq.get_daq_device_inventory(uldaq.InterfaceType.USB)