.

software/ors-amarisoft/ru/common-input-schema.json

 {
-  "$schema": "https://json-schema.org/draft/2020-12/schema"
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+
+  "required": [
+    "ru_type",
+    "ru_link_type"
+  ],
+
+  "properties": {
+    "ru_type": {
+      "type": "string"
+    },
+    "ru_link_type": {
+      "type": "string"
+    }
+  }
 }

software/ors-amarisoft/ru/sdr/input-schema.json

@@ -4,9 +4,11 @@
   "title": "SDR transiever",
   "description": "Radio Unit constituted of several SDR boards",
   "type": "object",
+  "allOf": {
+    "$ref": "../common-input-schema.json"
+  },
+
   "required": [
-    "ru_type",
-    "ru_link_type",
     "sdr_dev_list"
   ],
 
@@ -32,8 +34,6 @@
       },
       "minItems": 1,
       "uniqueItems": true
-    },
-
-    "$ref": "../common-input-schema.json"
+    }
   }
 }