diff --git a/eive_tmtc/tmtc/com/pdec_handler.py b/eive_tmtc/tmtc/com/pdec_handler.py
index c11d99c..508a5da 100644
--- a/eive_tmtc/tmtc/com/pdec_handler.py
+++ b/eive_tmtc/tmtc/com/pdec_handler.py
@@ -77,6 +77,19 @@ def pack_pdec_handler_test(
                 ).pack()
             )
         )
+    if op_code == OpCode.NEGATIVE_WINDOW:
+        q.add_log_cmd(f"{prefix}: {Info.NEGATIVE_WINDOW}")
+        nw = int(input("Specify negative window to set: "))
+        q.add_pus_tc(
+            create_load_param_cmd(
+                create_scalar_u8_parameter(
+                    object_id,
+                    0,
+                    ParameterId.NEGATIVE_WINDOW,
+                    nw,
+                ).pack()
+            )
+        )
 
 
 @tmtc_definitions_provider