diff --git a/src/nqrduck_autotm/model.py b/src/nqrduck_autotm/model.py
index dcad2f2..7e7b8f0 100644
--- a/src/nqrduck_autotm/model.py
+++ b/src/nqrduck_autotm/model.py
@@ -12,7 +12,7 @@ class S11Data:
     # Conversion factors - the data is generally sent and received in mV
     # These values are used to convert the data to dB and degrees
     CENTER_POINT_MAGNITUDE = 900  # mV
-    CENTER_POINT_PHASE = 900  # mV
+    CENTER_POINT_PHASE = 0  # mV
     MAGNITUDE_SLOPE = 30  # dB/mV
     PHASE_SLOPE = 10  # deg/mV
 
diff --git a/src/nqrduck_autotm/view.py b/src/nqrduck_autotm/view.py
index df9d9a7..8c15319 100644
--- a/src/nqrduck_autotm/view.py
+++ b/src/nqrduck_autotm/view.py
@@ -231,7 +231,7 @@ class AutoTMView(ModuleView):
 
         self.phase_ax.set_ylabel("|Phase (deg)|")
         self.phase_ax.plot(frequency, phase, color="orange", linestyle="--")
-        self.phase_ax.set_ylim(-180, 180)
+        self.phase_ax.set_ylim(0, 180)
         self.phase_ax.invert_yaxis()
 
         magnitude_ax.set_xlabel("Frequency (MHz)")