diff --git a/swagger/sdrangel/api/swagger/include/AFC.yaml b/swagger/sdrangel/api/swagger/include/AFC.yaml
index 4397ab890..4781ce38b 100644
--- a/swagger/sdrangel/api/swagger/include/AFC.yaml
+++ b/swagger/sdrangel/api/swagger/include/AFC.yaml
@@ -5,18 +5,32 @@ AFCSettings:
       type: string
     rgbColor:
       type: integer
-    rxDeviceSetIndex:
-      description: index of the Rx device set to connect the Rx side to
+    trackerDeviceSetIndex:
+      description: index of the device set of frequency tracker being used
       type: integer
-    txDeviceSetIndex:
-      description: index of the Tx device set to connect the Tx side to
+    trackedDeviceSetIndex:
+      description: index of the device set being tracked (channels and possibly device)
       type: integer
-    rx2TxDelayMs:
-      description: Delay in milliseconds from Rx off to Tx on
+    hasTargetFrequency:
       type: integer
-    tx2RxDelayMs:
-      description: Delay in milliseconds from Tx off to Rx on
+      description: >
+        Adjust device frequency to match tracker frequency
+          * 0 - disabled
+          * 1 - enabled
+    transverterTarget:
       type: integer
+      description: >
+        Use transverter or device frequency for tracker frequency adjustment
+          * 0 - device
+          * 1 - transverter
+    targetFrequency:
+      description: Target frequency for the tracker
+      type: integer
+      format: int64
+    freqTolerance:
+      descritpion: Frequency shift tolerance before tracker frequency is (re)adjusted
+      type: integer
+      format: int64
     useReverseAPI:
       description: Synchronize with reverse API (1 for yes, 0 for no)
       type: integer