diff --git a/Python_script/VNA_dummy.py b/Python_script/VNA_dummy.py
index af54446b2b78e96730eefc174a15036bacc68742..58fb1cb1b2c42cff207113f703801a93afd741ac 100644
--- a/Python_script/VNA_dummy.py
+++ b/Python_script/VNA_dummy.py
@@ -89,6 +89,9 @@ class VnaDummy:
         response = 'frequency set'
         return response
 
+    def set_sweep_mode(self, mode):
+        return '1'
+    
     def get_measurement_string(self, trace, result_format):
 
         self.simulated_traces = trace