diff --git a/_unittest/example_models/T12/coax_setup_solved_231.aedtz b/_unittest/example_models/T12/coax_setup_solved_231.aedtz
index 72ab5f470d8..7470fa2d89f 100644
Binary files a/_unittest/example_models/T12/coax_setup_solved_231.aedtz and b/_unittest/example_models/T12/coax_setup_solved_231.aedtz differ
diff --git a/_unittest/test_12_1_PostProcessing.py b/_unittest/test_12_1_PostProcessing.py
index 2349af9db82..7ec9f86a4b2 100644
--- a/_unittest/test_12_1_PostProcessing.py
+++ b/_unittest/test_12_1_PostProcessing.py
@@ -88,6 +88,7 @@ def test_01B_Field_Plot(self):
         )
         assert len(self.aedtapp.setups[0].sweeps[0].frequencies) > 0
         assert isinstance(self.aedtapp.setups[0].sweeps[0].basis_frequencies, list)
+        assert len(self.aedtapp.setups[0].sweeps[1].basis_frequencies) == 2
 
     @pytest.mark.skipif(is_linux or sys.version_info < (3, 8), reason="Not running in ironpython")
     def test_01_Animate_plt(self):
diff --git a/pyaedt/modules/SolveSweeps.py b/pyaedt/modules/SolveSweeps.py
index 8679d371f0f..bde54e41770 100644
--- a/pyaedt/modules/SolveSweeps.py
+++ b/pyaedt/modules/SolveSweeps.py
@@ -9,6 +9,7 @@
 from pyaedt import pyaedt_function_handler
 from pyaedt.generic.DataHandlers import _dict2arg
 from pyaedt.generic.LoadAEDTFile import load_entire_aedt_file
+from pyaedt.generic.constants import unit_converter
 from pyaedt.modules.SetupTemplates import Sweep3DLayout
 from pyaedt.modules.SetupTemplates import SweepHfss3D
 from pyaedt.modules.SetupTemplates import SweepSiwave
@@ -166,6 +167,12 @@ def basis_frequencies(self):
                     try:
                         new_list = [float(i) for i in v["Fields"]["IDDblMap"][1::2]]
                         new_list.sort()
+                        new_list = unit_converter(
+                            values=new_list,
+                            unit_system="Freq",
+                            input_units="Hz",
+                            output_units=self._app._app.odesktop.GetDefaultUnit("Frequency"),
+                        )
                         fr.append(new_list)
                     except (KeyError, NameError, IndexError):
                         pass
@@ -697,9 +704,15 @@ def basis_frequencies(self):
             solutions = load_entire_aedt_file(solutions_file)
             for k, v in solutions.items():
                 if "SolutionBlock" in k and "SolutionName" in v and v["SolutionName"] == self.name and "Fields" in v:
-                    try:
+                    try:  # pragma: no cover
                         new_list = [float(i) for i in v["Fields"]["IDDblMap"][1::2]]
                         new_list.sort()
+                        new_list = unit_converter(
+                            values=new_list,
+                            unit_system="Freq",
+                            input_units="Hz",
+                            output_units=self._app._app.odesktop.GetDefaultUnit("Frequency"),
+                        )
                         fr.append(new_list)
                     except (KeyError, NameError, IndexError):
                         pass