diff --git a/schema/appmodel/trigger.schema.xml b/schema/appmodel/trigger.schema.xml
index ce58bd8..8fe7dba 100644
--- a/schema/appmodel/trigger.schema.xml
+++ b/schema/appmodel/trigger.schema.xml
@@ -118,11 +118,11 @@
   <attribute name="scale_divisor_plane2" description="Running sum scale divisor for plane 2." type="u8" init-value="1" is-not-null="yes"/>
  </class>
 
- <class name="AVXThresholdProcessor" description="TPG threshold signal processor. Filters the input signal by passing values that are above threshold and suppresing otherwise.">
+ <class name="AVXThresholdProcessor" description="TPG threshold signal processor. Filters the input signal by passing values that are above threshold and suppressing otherwise.">
   <superclass name="ProcessingStep"/>
-  <attribute name="plane0" description="Threshold for plane 0." type="u16" init-value="100" is-not-null="yes"/>
-  <attribute name="plane1" description="Threshold for plane 1." type="u16" init-value="100" is-not-null="yes"/>
-  <attribute name="plane2" description="Threshold for plane 2." type="u16" init-value="100" is-not-null="yes"/>
+  <attribute name="plane0" description="Threshold for plane 0." type="s16" init-value="100" is-not-null="yes"/>
+  <attribute name="plane1" description="Threshold for plane 1." type="s16" init-value="100" is-not-null="yes"/>
+  <attribute name="plane2" description="Threshold for plane 2." type="s16" init-value="100" is-not-null="yes"/>
  </class>
 
  <class name="DataSubscriberModule">