diff --git a/vna_system/core/processors/base_processor.py b/vna_system/core/processors/base_processor.py
index 6baa78d..d35c5a1 100644
--- a/vna_system/core/processors/base_processor.py
+++ b/vna_system/core/processors/base_processor.py
@@ -598,7 +598,7 @@ class BaseProcessor:
                 calibrated_data = entry["calibrated_data"]
                 reference_data = entry.get("reference_data")
 
-                # Convert vna_config to fully serializable format
+                # Convert vna_config to fully serializable format (handles Enums)
                 vna_config = self._make_json_serializable(entry.get("vna_config", {}))
 
                 exported.append({
@@ -622,6 +622,7 @@ class BaseProcessor:
             History records in the format exported by export_history_data.
         """
         from vna_system.core.acquisition.sweep_buffer import SweepData
+        from vna_system.core.settings.preset_manager import VNAMode
 
         with self._lock:
             self._sweep_history.clear()
@@ -635,26 +636,37 @@ class BaseProcessor:
                 sweep_data = SweepData(
                     sweep_number=entry.get("sweep_number", 0),
                     timestamp=entry.get("timestamp", 0.0),
-                    points=sweep_points
+                    points=sweep_points,
+                    total_points=len(sweep_points)
                 ) if sweep_points else None
 
                 calibrated_data = SweepData(
                     sweep_number=entry.get("sweep_number", 0),
                     timestamp=entry.get("timestamp", 0.0),
-                    points=calibrated_points
+                    points=calibrated_points,
+                    total_points=len(calibrated_points)
                 ) if calibrated_points else None
 
                 reference_data = SweepData(
                     sweep_number=entry.get("sweep_number", 0),
                     timestamp=entry.get("timestamp", 0.0),
-                    points=reference_points
+                    points=reference_points,
+                    total_points=len(reference_points)
                 ) if reference_points else None
 
+                # Restore VNAMode enum from string if needed
+                vna_config = entry.get("vna_config", {})
+                if isinstance(vna_config.get("mode"), str):
+                    try:
+                        vna_config["mode"] = VNAMode(vna_config["mode"])
+                    except (ValueError, KeyError):
+                        pass  # Keep as string if conversion fails
+
                 self._sweep_history.append({
                     "sweep_data": sweep_data,
                     "calibrated_data": calibrated_data,
                     "reference_data": reference_data,
-                    "vna_config": entry.get("vna_config", {}),
+                    "vna_config": vna_config,
                     "timestamp": entry.get("timestamp"),
                 })
 
diff --git a/vna_system/core/processors/configs/bscan_config.json b/vna_system/core/processors/configs/bscan_config.json
index a783cb8..fd4a9f7 100644
--- a/vna_system/core/processors/configs/bscan_config.json
+++ b/vna_system/core/processors/configs/bscan_config.json
@@ -1,9 +1,9 @@
 {
   "open_air": false,
   "axis": "real",
-  "cut": 0.0,
-  "max": 1.4,
-  "gain": 1.0,
+  "cut": 0.292,
+  "max": 2.3,
+  "gain": 0.3,
   "start_freq": 100.0,
   "stop_freq": 8800.0,
   "clear_history": false,
diff --git a/vna_system/core/processors/configs/magnitude_config.json b/vna_system/core/processors/configs/magnitude_config.json
index 18abff2..1514069 100644
--- a/vna_system/core/processors/configs/magnitude_config.json
+++ b/vna_system/core/processors/configs/magnitude_config.json
@@ -1,5 +1,7 @@
 {
-  "y_min": -30,
-  "y_max": 10,
-  "show_phase": true
+  "y_min": -80,
+  "y_max": 40,
+  "autoscale": true,
+  "show_magnitude": true,
+  "show_phase": false
 }
\ No newline at end of file
diff --git a/vna_system/core/processors/websocket_handler.py b/vna_system/core/processors/websocket_handler.py
index af40cff..5f3aa32 100644
--- a/vna_system/core/processors/websocket_handler.py
+++ b/vna_system/core/processors/websocket_handler.py
@@ -200,16 +200,39 @@ class ProcessorWebSocketHandler:
     # --------------------------------------------------------------------- #
     # Outbound helpers
     # --------------------------------------------------------------------- #
+    def _make_json_serializable(self, obj: Any) -> Any:
+        """
+        Recursively convert non-serializable objects to JSON-compatible types.
+        Handles numpy types, Enums, custom objects, etc.
+        """
+        import numpy as np
+        from enum import Enum
+
+        if isinstance(obj, (np.integer, np.floating)):
+            return obj.item()  # Convert numpy scalar to Python type
+        elif isinstance(obj, np.ndarray):
+            return obj.tolist()  # Convert numpy array to list
+        elif isinstance(obj, Enum):
+            return obj.value
+        elif isinstance(obj, dict):
+            return {key: self._make_json_serializable(value) for key, value in obj.items()}
+        elif isinstance(obj, (list, tuple)):
+            return [self._make_json_serializable(item) for item in obj]
+        elif hasattr(obj, '__dict__'):
+            return self._make_json_serializable(obj.__dict__)
+        else:
+            return obj
+
     def _result_to_message(self, processor_id: str, result: ProcessedResult) -> dict[str, Any]:
         """Convert a `ProcessedResult` into a JSON-serializable message."""
         return {
             "type": "processor_result",
             "processor_id": processor_id,
             "timestamp": result.timestamp,
-            "data": result.data,
-            "plotly_config": result.plotly_config,
+            "data": self._make_json_serializable(result.data),
+            "plotly_config": self._make_json_serializable(result.plotly_config),
             "ui_parameters": [asdict(param) for param in result.ui_parameters],
-            "metadata": result.metadata,
+            "metadata": self._make_json_serializable(result.metadata),
         }
 
     async def _send_error(