diff --git a/plugins/EnergyScan.form b/plugins/EnergyScan.form
index 7b50e48..6154a71 100644
--- a/plugins/EnergyScan.form
+++ b/plugins/EnergyScan.form
@@ -299,6 +299,7 @@
             <Property name="model" type="javax.swing.SpinnerModel" editor="org.netbeans.modules.form.editors2.SpinnerModelEditor">
               <SpinnerModel initial="0.0" maximum="90.0" minimum="0.0" numberType="java.lang.Double" stepSize="1.0" type="number"/>
             </Property>
+            <Property name="enabled" type="boolean" value="false"/>
           </Properties>
         </Component>
       </SubComponents>
diff --git a/plugins/EnergyScan.java b/plugins/EnergyScan.java
index ce71d0d..4b45924 100644
--- a/plugins/EnergyScan.java
+++ b/plugins/EnergyScan.java
@@ -239,6 +239,7 @@ public class EnergyScan extends Panel {
         jLabel9.setText("Alpha:");
 
         spinnerAlpha.setModel(new javax.swing.SpinnerNumberModel(0.0d, 0.0d, 90.0d, 1.0d));
+        spinnerAlpha.setEnabled(false);
 
         javax.swing.GroupLayout panelParametersLayout = new javax.swing.GroupLayout(panelParameters);
         panelParameters.setLayout(panelParametersLayout);
@@ -449,6 +450,7 @@ public class EnergyScan extends Panel {
             spinnerDelay.setValue(Double.valueOf(tokens[3].trim()));
             comboMode.setSelectedIndex(Integer.valueOf(tokens[4].trim()));
             spinnerOffset.setValue(Double.valueOf(tokens[5].trim()));
+            spinnerAlpha.setEnabled(comboMode.getSelectedItem().equals("LINEAR"));
        } catch (Exception ex) {
             SwingUtils.showException(this, ex);
        }