diff --git a/common/utils/T/tracer/logger/framelog.c b/common/utils/T/tracer/logger/framelog.c
index 057960c38246b98b0e4c7be1225ec02dc9238495..45ae3e399f98dd4e1e091cf39606ad3b7ad3a88f 100644
--- a/common/utils/T/tracer/logger/framelog.c
+++ b/common/utils/T/tracer/logger/framelog.c
@@ -21,6 +21,7 @@ struct framelog {
                          */
   int skip_current;     /* internal data for the skip mechanism */
   int skip_on;          /* internal data for the skip mechanism */
+  int update_only_at_sf9;
 };
 
 static void _event(void *p, event e)
@@ -76,7 +77,7 @@ static void _event(void *p, event e)
     l->buffer[subframe * nsamples + i] = 10*log10(1.0+(float)(I*I+Q*Q));
   }
 
-  if (subframe == 9)
+  if (l->update_only_at_sf9 == 0 || subframe == 9)
     for (i = 0; i < l->common.vsize; i++)
       l->common.v[i]->append(l->common.v[i], l->x, l->buffer, l->blength);
 }
@@ -91,6 +92,8 @@ logger *new_framelog(event_handler *h, void *database,
 
   ret = calloc(1, sizeof(struct framelog)); if (ret == NULL) abort();
 
+  ret->update_only_at_sf9 = 1;
+
   ret->common.event_name = strdup(event_name);
   if (ret->common.event_name == NULL) abort();
   ret->database = database;
@@ -144,3 +147,9 @@ void framelog_set_skip(logger *_this, int skip_delay)
   l->skip_current = 0;
   l->skip_on = 0;
 }
+
+void framelog_set_update_only_at_sf9(logger *_this, int update_only_at_sf9)
+{
+  struct framelog *l = _this;
+  l->update_only_at_sf9 = update_only_at_sf9;
+}
diff --git a/common/utils/T/tracer/logger/logger.h b/common/utils/T/tracer/logger/logger.h
index e3e4b97aa5e4e85844376c61663036d3f7a78b5b..c9779731601e25864fb95d05194a9887f59b2ea1 100644
--- a/common/utils/T/tracer/logger/logger.h
+++ b/common/utils/T/tracer/logger/logger.h
@@ -15,6 +15,7 @@ logger *new_ticklog(void *event_handler, void *database,
     char *event_name, char *frame_name, char *subframe_name);
 
 void framelog_set_skip(logger *_this, int skip_delay);
+void framelog_set_update_only_at_sf9(logger *_this, int update_only_at_sf9);
 
 #include "view/view.h"