diff --git a/targets/RT/USER/lte-ru.c b/targets/RT/USER/lte-ru.c
index f36df9518d..d6f6d376f7 100644
--- a/targets/RT/USER/lte-ru.c
+++ b/targets/RT/USER/lte-ru.c
@@ -1867,8 +1867,12 @@ void *ru_thread_synch(void *arg) {
 	}
 	*/
 	ru->in_synch=1;
+      } // symc_pos > 0
+      else {
+        write_output("ru_sync.m","sync",(void*)&sync_corr[0],fp->samples_per_tti*5,1,2);
+        write_output("ru_rx.m","rxs",(void*)ru->common.rxdata[0][0],fp->samples_per_tti*10,1,1);
       }
-    }
+    } // ru->in_synch==0
 
     if (release_thread(&ru->proc.mutex_synch,&ru->proc.instance_cnt_synch,"ru_synch_thread") < 0) break;
   } // oai_exit