added multidevice support

run_config.json

@@ -1,9 +1,17 @@
 {
   "radar": {
-    "model": "librevna",
-    "serial": "",
+    "model": "librevna_multi",
+    "serial": "207730885532",
     "driver_mode": "native",
     "mock_signal_hz": 5000000.0,
+    "multi_device": {
+      "slave_serials": [
+        "20A1307D5532",
+        "2072306C5532"
+      ],
+      "force_external_reference": true,
+      "recovery_attempts": 3
+    },
     "sweep": {
       "start_hz": 1000000.0,
       "stop_hz": 6000000000.0,
@@ -57,10 +65,10 @@
       {"input": 1, "output": 0},
       {"input": 2, "output": 0},
       {"input": 3, "output": 0},
-      {"input": 0, "output": 3},
-      {"input": 1, "output": 3},
-      {"input": 2, "output": 3},
-      {"input": 3, "output": 3}
+      {"input": 0, "output": 1},
+      {"input": 1, "output": 1},
+      {"input": 2, "output": 1},
+      {"input": 3, "output": 1}
     ]
   },
   "preprocess": {
@@ -97,11 +105,6 @@
     "notch": {
       "enabled": true,
       "bands_hz": [
-        [790000000.0, 850000000.0],
-        [1790000000.0, 1890000000.0],
-        [1970000000.0, 2050000000.0],
-        [2080000000.0, 2560000000.0],
-        [2650000000.0, 2700000000.0]
       ],
       "taper_width_hz": 40000000.0,
       "taper_type": "cosine"
@@ -116,7 +119,7 @@
         "x_m": 0.905
       },
       {
-        "output_pos": 3,
+        "output_pos": 1,
         "x_m": -0.905
       }
     ],