Apply offset delays _after_ calibration

NanoVNASaver/SweepWorker.py

@@ -190,33 +190,29 @@ class SweepWorker(QtCore.QRunnable):
                          raw_data11: List[Datapoint],
                          raw_data21: List[Datapoint]
                          ) -> Tuple[List[Datapoint], List[Datapoint]]:
-        if self.offsetDelay != 0:
-            tmp = []
-            for dp in raw_data11:
-                tmp.append(correct_delay(dp, self.offsetDelay, reflect=True))
-            raw_data11 = tmp
-            tmp = []
-            for dp in raw_data21:
-                tmp.append(correct_delay(dp, self.offsetDelay))
-            raw_data21 = tmp
-
-        if not self.app.calibration.isCalculated:
-            return raw_data11, raw_data21
-
         data11: List[Datapoint] = []
         data21: List[Datapoint] = []
-
-        if self.app.calibration.isValid1Port():
-            for dp in raw_data11:
-                data11.append(self.app.calibration.correct11(dp))
+        
+        if not self.app.calibration.isCalculated:
+            data11 = raw_data11.copy()
+            data21 = raw_data21.copy()
         else:
-            data11 = raw_data11
+            if self.app.calibration.isValid1Port():
+                for dp in raw_data11:
+                    data11.append(self.app.calibration.correct11(dp))
+            else:
+                data11 = raw_data11.copy()
+
+            if self.app.calibration.isValid2Port():
+                for dp in raw_data21:
+                    data21.append(self.app.calibration.correct21(dp))
+            else:
+                data21 = raw_data21.copy()
+        
+        if self.offsetDelay != 0:
+            data11 = [correct_delay(dp, self.offsetDelay, reflect=True) for dp in data11]
+            data21 = [correct_delay(dp, self.offsetDelay) for dp in data21]
 
-        if self.app.calibration.isValid2Port():
-            for dp in raw_data21:
-                data21.append(self.app.calibration.correct21(dp))
-        else:
-            data21 = raw_data21
         return data11, data21
 
     def readAveragedSegment(self, start, stop, averages=1):