diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
index fe1513715e..9642d6db80 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
@@ -361,7 +361,6 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
   int CC_id, UE_id = 0;
   gNB_MAC_INST *gNB = RC.nrmac[module_idP];
   NR_UE_list_t *UE_list = &gNB->UE_list;
-  NR_UE_sched_ctrl_t *ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
   NR_COMMON_channels_t *cc = gNB->common_channels;
   NR_sched_pucch *pucch_sched = (NR_sched_pucch*) malloc(sizeof(NR_sched_pucch));
 
@@ -397,40 +396,44 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
       
         rnti = 0;//UE_RNTI(module_idP, i);
         CC_id = 0;//UE_PCCID(module_idP, i);
-    
+
       } //END if (UE_list->active[i])
     } //END for (i = 0; i < MAX_MOBILES_PER_GNB; i++)
     */
-  
+
     // This schedules MIB
     if((slot_txP == 0) && (frame_txP & 7) == 0){
       schedule_nr_mib(module_idP, frame_txP, slot_txP);
     }
 
-    // TbD once RACH is available, start ta_timer when UE is connected
-    if (ue_sched_ctl->ta_timer) ue_sched_ctl->ta_timer--;
+    // Phytest scheduling
+    if (get_softmodem_params()->phy_test) {
+      NR_UE_sched_ctrl_t *ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
 
-    if (ue_sched_ctl->ta_timer == 0) {
-      gNB->ta_command = ue_sched_ctl->ta_update;
-      /* if time is up, then set the timer to not send it for 5 frames
-      // regardless of the TA value */
-      ue_sched_ctl->ta_timer = 100;
-      /* reset ta_update */
-      ue_sched_ctl->ta_update = 31;
-      /* MAC CE flag indicating TA length */
-      gNB->ta_len = 2;
+      // TbD once RACH is available, start ta_timer when UE is connected
+      if (ue_sched_ctl->ta_timer)
+        ue_sched_ctl->ta_timer--;
+
+      if (ue_sched_ctl->ta_timer == 0) {
+        gNB->ta_command = ue_sched_ctl->ta_update;
+        /* if time is up, then set the timer to not send it for 5 frames
+        // regardless of the TA value */
+        ue_sched_ctl->ta_timer = 100;
+        /* reset ta_update */
+        ue_sched_ctl->ta_update = 31;
+        /* MAC CE flag indicating TA length */
+        gNB->ta_len = 2;
+      }
+
+      if (slot_txP == 1){
+        nr_schedule_uss_dlsch_phytest(module_idP, frame_txP, slot_txP, pucch_sched, NULL);
+        // resetting ta flag
+        gNB->ta_len = 0;
+      }
     }
 
     if (get_softmodem_params()->phy_test == 0)
       nr_schedule_RA(module_idP, frame_txP, slot_txP);
-    
-    // Phytest scheduling
-    if (get_softmodem_params()->phy_test && slot_txP==1){
-      nr_schedule_uss_dlsch_phytest(module_idP, frame_txP, slot_txP, pucch_sched, NULL);
-      // resetting ta flag
-      gNB->ta_len = 0;
-    }
-
 
     /*
     // Allocate CCEs for good after scheduling is done
diff --git a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpx300.conf b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpx300.conf
index 688fae9b0f..0b04dc82d1 100644
--- a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpx300.conf
+++ b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpx300.conf
@@ -33,10 +33,10 @@ gNBs =
 #  downlinkConfigCommon
     #frequencyInfoDL
       # this is 3600 MHz + 43 PRBs@30kHz SCS (same as initial BWP)
-      absoluteFrequencySSB                                          = 633032;
+      absoluteFrequencySSB                                          = 641032;
       dl_frequencyBand                                                 = 78;
-      # this is 3480 MHz
-      dl_absoluteFrequencyPointA                                       = 632000;
+      # this is 3600 MHz
+      dl_absoluteFrequencyPointA                                       = 640000;
       #scs-SpecificCarrierList
         dl_offstToCarrier                                              = 0;
 # subcarrierSpacing
@@ -153,7 +153,7 @@ gNBs =
 # ssb_PositionsInBurs_BitmapPR
 # 1=short, 2=medium, 3=long
       ssb_PositionsInBurst_PR                                       = 2;
-      ssb_PositionsInBurst_Bitmap                                   = 255;
+      ssb_PositionsInBurst_Bitmap                                   = 1;
 
 # ssb_periodicityServingCell
 # 0 = ms5, 1=ms10, 2=ms20, 3=ms40, 4=ms80, 5=ms160, 6=spare2, 7=spare1 
@@ -242,7 +242,8 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 114;
          eNB_instances  = [0];
-	 sdr_addrs = "type=x300";
+         sdr_addrs = "type=x300";
+         clock_src = "external";
     }
 );