diff --git a/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c b/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
index 7f52443fce..79c2011d94 100644
--- a/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
+++ b/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
@@ -323,7 +323,7 @@ int nr_dlsch_encoding(unsigned char *a,
 
   unsigned int G;
   unsigned int crc=1;
-  uint8_t harq_pid = dlsch->harq_ids[frame&2][slot];
+  uint8_t harq_pid = dlsch->harq_ids[frame%2][slot];
   AssertFatal(harq_pid<8 && harq_pid>=0,"illegal harq_pid %d\b",harq_pid);
   nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &dlsch->harq_processes[harq_pid]->pdsch_pdu.pdsch_pdu_rel15;
   uint16_t nb_rb = rel15->rbSize;
diff --git a/openair2/LAYER2/NR_MAC_UE/config_ue.c b/openair2/LAYER2/NR_MAC_UE/config_ue.c
index b5041396a4..b36ce6f3ea 100755
--- a/openair2/LAYER2/NR_MAC_UE/config_ue.c
+++ b/openair2/LAYER2/NR_MAC_UE/config_ue.c
@@ -221,7 +221,7 @@ void config_common_ue(NR_UE_MAC_INST_t *mac,
   if (scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA > 2016666)
     scs_scaling = scs_scaling>>2;
   uint32_t absolute_diff = (*scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB - scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
-  cfg->ssb_table.ssb_offset_point_a = absolute_diff/(12*scs_scaling);
+  cfg->ssb_table.ssb_offset_point_a = absolute_diff/(12*scs_scaling) - 10;
   cfg->ssb_table.ssb_period = *scc->ssb_periodicityServingCell;
   cfg->ssb_table.ssb_subcarrier_offset = 0; // TODO currently not in RRC?
   switch (scc->ssb_PositionsInBurst->present) {
diff --git a/openair2/LAYER2/NR_MAC_gNB/config.c b/openair2/LAYER2/NR_MAC_gNB/config.c
index 44a3f11711..aa6d87a37d 100644
--- a/openair2/LAYER2/NR_MAC_gNB/config.c
+++ b/openair2/LAYER2/NR_MAC_gNB/config.c
@@ -207,7 +207,7 @@ void config_common(int Mod_idP, int pdsch_AntennaPorts, NR_ServingCellConfigComm
   if (scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA > 2016666)
     scs_scaling = scs_scaling>>2;
   uint32_t absolute_diff = (*scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB - scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
-  cfg->ssb_table.ssb_offset_point_a.value = absolute_diff/(12*scs_scaling);
+  cfg->ssb_table.ssb_offset_point_a.value = absolute_diff/(12*scs_scaling) - 10; //absoluteFrequencySSB is the central frequency of SSB which is made by 20RBs in total
   cfg->ssb_table.ssb_offset_point_a.tl.tag = NFAPI_NR_CONFIG_SSB_OFFSET_POINT_A_TAG;
   cfg->num_tlv++;
   cfg->ssb_table.ssb_period.value = *scc->ssb_periodicityServingCell;
diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c
index 2983c699c0..1e743522f5 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c
@@ -135,7 +135,7 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP){
         AssertFatal(1==0,"SCS %ld not allowed for SSB \n", *cc->ServingCellConfigCommon->ssbSubcarrierSpacing);
       }
       dl_config_pdu->ssb_pdu.ssb_pdu_rel15.SsbSubcarrierOffset = 0; //kSSB
-      dl_config_pdu->ssb_pdu.ssb_pdu_rel15.ssbOffsetPointA     = ssb_offset0/(ratio*12);
+      dl_config_pdu->ssb_pdu.ssb_pdu_rel15.ssbOffsetPointA     = ssb_offset0/(ratio*12) - 10; // absoluteFrequencySSB is the center of SSB
       dl_config_pdu->ssb_pdu.ssb_pdu_rel15.bchPayloadFlag      = 1;
       dl_config_pdu->ssb_pdu.ssb_pdu_rel15.bchPayload          = (*(uint32_t*)cc->MIB_pdu.payload) & ((1<<24)-1);
       dl_req->nPDUs++;
diff --git a/openair2/RRC/NR/rrc_gNB.c b/openair2/RRC/NR/rrc_gNB.c
index 6fbb1b3cdc..d32c6d6f3c 100644
--- a/openair2/RRC/NR/rrc_gNB.c
+++ b/openair2/RRC/NR/rrc_gNB.c
@@ -204,7 +204,7 @@ static void init_NR_SI(gNB_RRC_INST *rrc) {
                          );
 
 
-  /*if (phy_test > 0) {
+  if (phy_test > 0) {
     // This is for phytest only, emulate first X2 message if uecap.raw file is present
     FILE *fd;
 
@@ -253,7 +253,7 @@ static void init_NR_SI(gNB_RRC_INST *rrc) {
       LOG_I(NR_RRC,"Adding new user (%p)\n",ue_context_p);    
       rrc_add_nsa_user(rrc,ue_context_p);
     } 
-  }*/
+  }
 }
 
 
diff --git a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.217PRB.usrpn300.conf b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.217PRB.usrpn300.conf
index 22df17cd9f..b82c455ef4 100644
--- a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.217PRB.usrpn300.conf
+++ b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.217PRB.usrpn300.conf
@@ -200,7 +200,7 @@ gNBs =
                           );
                           
     ///X2
-    enable_x2 = "yes";
+    enable_x2 = "no";
     t_reloc_prep      = 1000;      /* unit: millisecond */
     tx2_reloc_overall = 2000;      /* unit: millisecond */
     target_enb_x2_ip_address      = (