diff --git a/MainForm.pas b/MainForm.pas
index 2e7101c..43223a6 100644
--- a/MainForm.pas
+++ b/MainForm.pas
@@ -1453,6 +1453,13 @@ begin
         FSpecView.WfAGCEnabled := FController.FWfAGCEnabled;
       rfWfNF:
         FSpecView.WfNFEnabled := FController.FWfNFEnabled;
+      rfFMStepIdx:
+        begin
+          if FStepDropDown <> nil then FStepDropDown.SetItemIndex(FController.FFMStepIdx);
+          if FWebServer <> nil then FWebServer.FMStepIdx := FController.FFMStepIdx;
+          if (FController.FMode = MODE_FM) and (FSpecView <> nil) then
+            FSpecView.FMGridStepHz := FM_STEP_HZ[FController.FFMStepIdx];
+        end;
     end;
   finally
     FSyncingFromController := False;
@@ -5400,11 +5407,10 @@ end;
 
 procedure TMainForm.SetFMStep(Idx: Integer);
 begin
-  FController.FFMStepIdx := Idx;
-  if FStepDropDown <> nil then FStepDropDown.SetItemIndex(Idx);
-  if FWebServer <> nil then FWebServer.FMStepIdx := Idx;
-  if (FController.FMode = MODE_FM) and (FSpecView <> nil) then
-    FSpecView.FMGridStepHz := FM_STEP_HZ[Idx];
+  // Тонкая обёртка: команда контроллера обновит UI/web/спецвью через
+  // OnControllerState(rfFMStepIdx). Сохранена для существующих вызовов
+  // (RestoreBand, dropdown-select, web-sync, XVTR-restore).
+  FController.SetFMStep(Idx);
 end;
 
 procedure TMainForm.BtnFMStepClick(Sender: TObject);
diff --git a/RadioController.pas b/RadioController.pas
index 47eb0d4..b408e43 100644
--- a/RadioController.pas
+++ b/RadioController.pas
@@ -516,7 +516,11 @@ procedure TRadioController.SetTune(On_: Boolean);
 begin FTuning := On_; Changed(rfTuning); { TODO wiring: ApplyTUN } end;
 
 procedure TRadioController.SetFMStep(Idx: Integer);
-begin FFMStepIdx := Idx; Changed(rfFMStepIdx); { TODO wiring } end;
+begin
+  if Idx < 0 then Idx := 0 else if Idx > 3 then Idx := 3;   // FM_STEP_COUNT = 4
+  FFMStepIdx := Idx;
+  Changed(rfFMStepIdx);
+end;
 
 procedure TRadioController.SetFMCTCSS(On_: Boolean);
 begin FFMCTCSSOn := On_; Changed(rfFMCTCSS); { TODO wiring } end;