diff --git a/doc/RUNMODEM.md b/doc/RUNMODEM.md
index 057be0d6cf..7a4dbefa3d 100644
--- a/doc/RUNMODEM.md
+++ b/doc/RUNMODEM.md
@@ -179,15 +179,15 @@ With the RF simulator (on the same machine):
 
 ## IF setup with OAI
 
-The `if_freq` and `if_freq_off` options can be used to set (via command line) custom downlink and uplink FR1 arbitrary frequencies for the IF equipment both.
+OAI is also compatible with Intermediate Frequency (IF) equipment. This allows to use RF front-end that with arbitrary frequencies bands that do not comply with the standardised 3GPP NR bands. 
 
-In the same way, the following parameters must be configured in the RUs section of the gNB configuration file:
+To configure the IF frequencies it is necessary to use two command-line options at UE side:
+- `if_freq`, downlink frequency in Hz
+- `if_freq_off`, uplink frequency offset in Hz
 
-`if_freq`
-
-`if_offset`
-
-The values must be given in Hz.
+Accordingly, the following parameters must be configured in the RUs section of the gNB configuration file:
+- `if_freq`
+- `if_offset`
 
 ### Run OAI with custom DL/UL arbitrary frequencies
 
diff --git a/openair2/GNB_APP/gnb_config.c b/openair2/GNB_APP/gnb_config.c
index 50acd69994..a3ea0ec0f6 100644
--- a/openair2/GNB_APP/gnb_config.c
+++ b/openair2/GNB_APP/gnb_config.c
@@ -348,7 +348,7 @@ void fix_scc(NR_ServingCellConfigCommon_t *scc,uint64_t ssbmap) {
 
   lte_frame_type_t frame_type = get_frame_type((int)*scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0], *scc->ssbSubcarrierSpacing);
   if (frame_type == FDD) {
-    free(scc->tdd_UL_DL_ConfigurationCommon);
+    ASN_STRUCT_FREE(asn_DEF_NR_TDD_UL_DL_ConfigCommon, scc->tdd_UL_DL_ConfigurationCommon);
     scc->tdd_UL_DL_ConfigurationCommon = NULL;
   } else { // TDD
     if (scc->tdd_UL_DL_ConfigurationCommon->pattern2->dl_UL_TransmissionPeriodicity > 320 ) {
diff --git a/openair2/LAYER2/NR_MAC_UE/config_ue.c b/openair2/LAYER2/NR_MAC_UE/config_ue.c
index 7e0609f554..3b10167e03 100644
--- a/openair2/LAYER2/NR_MAC_UE/config_ue.c
+++ b/openair2/LAYER2/NR_MAC_UE/config_ue.c
@@ -42,14 +42,14 @@ void set_tdd_config_nr_ue(fapi_nr_config_request_t *cfg,
                           int mu,
                           NR_TDD_UL_DL_ConfigCommon_t *tdd_config) {
 
-  int nrofDownlinkSlots   = tdd_config->pattern1.nrofDownlinkSlots;
-  int nrofDownlinkSymbols = tdd_config->pattern1.nrofDownlinkSymbols;
-  int nrofUplinkSlots     = tdd_config->pattern1.nrofUplinkSlots;
-  int nrofUplinkSymbols   = tdd_config->pattern1.nrofUplinkSymbols;
+  const int nrofDownlinkSlots   = tdd_config->pattern1.nrofDownlinkSlots;
+  const int nrofDownlinkSymbols = tdd_config->pattern1.nrofDownlinkSymbols;
+  const int nrofUplinkSlots     = tdd_config->pattern1.nrofUplinkSlots;
+  const int nrofUplinkSymbols   = tdd_config->pattern1.nrofUplinkSymbols;
   int slot_number = 0;
-  int nb_periods_per_frame = get_nb_periods_per_frame(tdd_config->pattern1.dl_UL_TransmissionPeriodicity);
-  int nb_slots_to_set = TDD_CONFIG_NB_FRAMES*(1<<mu)*NR_NUMBER_OF_SUBFRAMES_PER_FRAME;
-  int nb_slots_per_period = ((1<<mu) * NR_NUMBER_OF_SUBFRAMES_PER_FRAME)/nb_periods_per_frame;
+  const int nb_periods_per_frame = get_nb_periods_per_frame(tdd_config->pattern1.dl_UL_TransmissionPeriodicity);
+  const int nb_slots_to_set = TDD_CONFIG_NB_FRAMES*(1<<mu)*NR_NUMBER_OF_SUBFRAMES_PER_FRAME;
+  const int nb_slots_per_period = ((1<<mu) * NR_NUMBER_OF_SUBFRAMES_PER_FRAME)/nb_periods_per_frame;
   cfg->tdd_table.tdd_period_in_slots = nb_slots_per_period;
 
   if ( (nrofDownlinkSymbols + nrofUplinkSymbols) == 0 )
@@ -105,7 +105,14 @@ void set_tdd_config_nr_ue(fapi_nr_config_request_t *cfg,
     }
   }
 
-  LOG_I(NR_MAC, "TDD has been properly configurated\n");
+  if (tdd_config->pattern1.ext1 == NULL) {
+    cfg->tdd_table.tdd_period = tdd_config->pattern1.dl_UL_TransmissionPeriodicity;
+  } else {
+    AssertFatal(tdd_config->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530 != NULL, "scc->tdd_UL_DL_ConfigurationCommon->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530 is null\n");
+    cfg->tdd_table.tdd_period = *tdd_config->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530;
+  }
+
+  LOG_I(NR_MAC, "TDD has been properly configured\n");
 
 }
 
diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
index 39fd4671cb..1d93e8ea8d 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
@@ -422,7 +422,7 @@ void nr_schedule_msg2(uint16_t rach_frame, uint16_t rach_slot,
   }
   else{
     if(frame_type == TDD)
-      AssertFatal(1==0,"Dynamic TDD not handled yet\n");
+      AssertFatal(frame_type == FDD, "Dynamic TDD not handled yet\n");
   }