diff --git a/lib/include/srslte/phy/enb/enb_dl_nr.h b/lib/include/srslte/phy/enb/enb_dl_nr.h
index 44e7ad276..64c8b0bc9 100644
--- a/lib/include/srslte/phy/enb/enb_dl_nr.h
+++ b/lib/include/srslte/phy/enb/enb_dl_nr.h
@@ -24,6 +24,7 @@ extern "C" {
 typedef struct SRSLTE_API {
   srslte_pdsch_args_t pdsch;
   uint32_t            nof_tx_antennas;
+  uint32_t            nof_max_prb;
 } srslte_enb_dl_nr_args_t;
 
 typedef struct SRSLTE_API {
diff --git a/lib/src/phy/ch_estimation/dmrs_pdsch.c b/lib/src/phy/ch_estimation/dmrs_pdsch.c
index 979f0f957..f6f3b8def 100644
--- a/lib/src/phy/ch_estimation/dmrs_pdsch.c
+++ b/lib/src/phy/ch_estimation/dmrs_pdsch.c
@@ -440,6 +440,8 @@ static uint32_t srslte_dmrs_pdsch_seed(const srslte_carrier_nr_t*     carrier,
   const srslte_pdsch_dmrs_cfg_t* dmrs_cfg =
       grant->mapping == srslte_pdsch_mapping_type_A ? &cfg->dmrs_cfg_typeA : &cfg->dmrs_cfg_typeB;
 
+  slot_idx = slot_idx % SRSLTE_NSLOTS_PER_FRAME_NR(carrier->numerology);
+
   // Calculate scrambling IDs
   uint32_t n_id   = carrier->id;
   uint32_t n_scid = (grant->n_scid) ? 1 : 0;
@@ -763,4 +765,4 @@ int srslte_dmrs_pdsch_estimate(srslte_dmrs_pdsch_t*           q,
   chest_res->nof_re = count;
 
   return SRSLTE_SUCCESS;
-}
\ No newline at end of file
+}
diff --git a/lib/src/phy/enb/enb_dl_nr.c b/lib/src/phy/enb/enb_dl_nr.c
index cc1d7361a..dc48e08b0 100644
--- a/lib/src/phy/enb/enb_dl_nr.c
+++ b/lib/src/phy/enb/enb_dl_nr.c
@@ -50,14 +50,14 @@ int srslte_enb_dl_nr_init(srslte_enb_dl_nr_t* q, cf_t* output[SRSLTE_MAX_PORTS],
     return SRSLTE_ERROR;
   }
 
-  if (enb_dl_alloc_prb(q, SRSLTE_MAX_PRB_NR) < SRSLTE_SUCCESS) {
+  if (enb_dl_alloc_prb(q, args->nof_max_prb) < SRSLTE_SUCCESS) {
     ERROR("Error allocating\n");
     return SRSLTE_ERROR;
   }
 
   srslte_ofdm_cfg_t fft_cfg = {};
-  fft_cfg.nof_prb           = 100;
-  fft_cfg.symbol_sz         = srslte_symbol_sz(100);
+  fft_cfg.nof_prb           = args->nof_max_prb;
+  fft_cfg.symbol_sz         = srslte_symbol_sz(args->nof_max_prb);
   fft_cfg.keep_dc           = true;
 
   for (uint32_t i = 0; i < q->nof_tx_antennas; i++) {
diff --git a/lib/src/phy/phch/pdsch_nr.c b/lib/src/phy/phch/pdsch_nr.c
index 566a01ba2..4a79b211f 100644
--- a/lib/src/phy/phch/pdsch_nr.c
+++ b/lib/src/phy/phch/pdsch_nr.c
@@ -648,7 +648,7 @@ static uint32_t srslte_pdsch_nr_grant_info(const srslte_pdsch_cfg_nr_t*   cfg,
   len = srslte_print_check(str, str_len, len, ",Nl=%d", grant->nof_layers);
 
   // Append scrambling ID
-  len = srslte_print_check(str, str_len, len, ",n_scid=%d", grant->n_scid);
+  len = srslte_print_check(str, str_len, len, ",n_scid=%d,", grant->n_scid);
 
   // Append TB info
   for (uint32_t i = 0; i < SRSLTE_MAX_TB; i++) {
diff --git a/lib/src/phy/ue/ue_dl_nr.c b/lib/src/phy/ue/ue_dl_nr.c
index 25b0f9112..3f9f963e8 100644
--- a/lib/src/phy/ue/ue_dl_nr.c
+++ b/lib/src/phy/ue/ue_dl_nr.c
@@ -178,4 +178,4 @@ int srslte_ue_dl_nr_pdsch_info(const srslte_ue_dl_nr_t*       q,
   len += srslte_pdsch_nr_rx_info(&q->pdsch, cfg, grant, res, &str[len], str_len - len);
 
   return len;
-}
\ No newline at end of file
+}
diff --git a/lib/test/phy/phy_dl_nr_test.c b/lib/test/phy/phy_dl_nr_test.c
index 2a6f1501e..fd82d3423 100644
--- a/lib/test/phy/phy_dl_nr_test.c
+++ b/lib/test/phy/phy_dl_nr_test.c
@@ -28,6 +28,8 @@ static srslte_carrier_nr_t carrier = {
 
 };
 
+#define MAX_PRB 100
+
 static uint32_t                n_prb       = 0;  // Set to 0 for steering
 static uint32_t                mcs         = 30; // Set to 30 for steering
 static srslte_pdsch_cfg_nr_t   pdsch_cfg   = {};
@@ -86,7 +88,7 @@ int main(int argc, char** argv)
   uint8_t* data_rx[SRSLTE_MAX_CODEWORDS] = {};
   cf_t*    buffer                        = NULL;
 
-  buffer = srslte_vec_cf_malloc(SRSLTE_SF_LEN_PRB(carrier.nof_prb));
+  buffer = srslte_vec_cf_malloc(SRSLTE_SF_LEN_PRB(MAX_PRB));
   if (buffer == NULL) {
     ERROR("Error malloc\n");
     goto clean_exit;
@@ -94,13 +96,14 @@ int main(int argc, char** argv)
 
   srslte_ue_dl_nr_args_t ue_dl_args = {};
   ue_dl_args.nof_rx_antennas        = 1;
-  ue_dl_args.nof_max_prb            = carrier.nof_prb;
+  ue_dl_args.nof_max_prb            = MAX_PRB;
   ue_dl_args.pdsch.sch.disable_simd = true;
   ue_dl_args.pdsch.measure_evm      = true;
   ue_dl_args.pdsch.measure_time     = true;
 
   srslte_enb_dl_nr_args_t enb_dl_args = {};
   enb_dl_args.nof_tx_antennas         = 1;
+  enb_dl_args.nof_max_prb             = MAX_PRB;
   enb_dl_args.pdsch.sch.disable_simd  = true;
 
   // Set default PDSCH configuration
diff --git a/srsenb/hdr/phy/nr/cc_worker.h b/srsenb/hdr/phy/nr/cc_worker.h
index 83feb2a7b..db3a3c537 100644
--- a/srsenb/hdr/phy/nr/cc_worker.h
+++ b/srsenb/hdr/phy/nr/cc_worker.h
@@ -32,7 +32,6 @@ namespace nr {
 
 typedef struct {
   uint32_t                nof_carriers;
-  uint32_t                max_prb;
   srslte_enb_dl_nr_args_t dl;
 } phy_nr_args_t;
 
@@ -49,7 +48,7 @@ public:
   phy_nr_state()
   {
     args.nof_carriers              = 1;
-    args.max_prb                   = 100;
+    args.dl.nof_max_prb            = 100;
     args.dl.nof_tx_antennas        = 1;
     args.dl.pdsch.measure_evm      = true;
     args.dl.pdsch.measure_time     = true;
@@ -77,6 +76,7 @@ private:
   uint32_t                            cc_idx      = 0;
   std::array<cf_t*, SRSLTE_MAX_PORTS> tx_buffer   = {};
   std::array<cf_t*, SRSLTE_MAX_PORTS> rx_buffer   = {};
+  uint32_t                            buffer_sz   = 0;
   phy_nr_state*                       phy_state;
   srslte_enb_dl_nr_t                  enb_dl = {};
   srslte::log*                        log_h  = nullptr;
diff --git a/srsenb/src/phy/nr/cc_worker.cc b/srsenb/src/phy/nr/cc_worker.cc
index 4740131cd..570008545 100644
--- a/srsenb/src/phy/nr/cc_worker.cc
+++ b/srsenb/src/phy/nr/cc_worker.cc
@@ -20,6 +20,7 @@
  */
 
 #include "srsenb/hdr/phy/nr/cc_worker.h"
+#include "srslte/common/common.h"
 #include "srslte/phy/enb/enb_dl_nr.h"
 #include "srslte/phy/phch/ra_nr.h"
 #include "srslte/phy/ue/ue_dl_nr_data.h"
@@ -32,10 +33,10 @@ cc_worker::cc_worker(uint32_t cc_idx_, srslte::log* log, phy_nr_state* phy_state
   cf_t* buffer_c[SRSLTE_MAX_PORTS] = {};
 
   // Allocate buffers
-  uint32_t sf_len = SRSLTE_SF_LEN_PRB(phy_state->args.max_prb);
+  buffer_sz = SRSLTE_SF_LEN_PRB(phy_state->args.dl.nof_max_prb);
   for (uint32_t i = 0; i < phy_state_->args.dl.nof_tx_antennas; i++) {
-    tx_buffer[i] = srslte_vec_cf_malloc(sf_len);
-    rx_buffer[i] = srslte_vec_cf_malloc(sf_len);
+    tx_buffer[i] = srslte_vec_cf_malloc(buffer_sz);
+    rx_buffer[i] = srslte_vec_cf_malloc(buffer_sz);
     buffer_c[i]  = tx_buffer[i];
   }
 
@@ -49,12 +50,9 @@ cc_worker::cc_worker(uint32_t cc_idx_, srslte::log* log, phy_nr_state* phy_state
     ERROR("Error init soft-buffer\n");
     return;
   }
-  data.resize(SRSLTE_SCH_NR_MAX_NOF_CB_LDPC * SRSLTE_LDPC_MAX_LEN_ENCODED_CB);
-  srslte_random_t r = srslte_random_init(1234);
-  for (uint32_t i = 0; i < SRSLTE_SCH_NR_MAX_NOF_CB_LDPC * SRSLTE_LDPC_MAX_LEN_ENCODED_CB; i++) {
-    data[i] = srslte_random_uniform_int_dist(r, 0, UINT8_MAX);
-  }
-  srslte_random_free(r);
+  data.resize(SRSLTE_SCH_NR_MAX_NOF_CB_LDPC * SRSLTE_LDPC_MAX_LEN_ENCODED_CB / 8);
+  srslte_vec_u8_zero(data.data(), SRSLTE_SCH_NR_MAX_NOF_CB_LDPC * SRSLTE_LDPC_MAX_LEN_ENCODED_CB / 8);
+  snprintf((char*)data.data(), SRSLTE_SCH_NR_MAX_NOF_CB_LDPC * SRSLTE_LDPC_MAX_LEN_ENCODED_CB / 8, "hello world!");
 }
 
 cc_worker::~cc_worker()
@@ -84,7 +82,7 @@ bool cc_worker::set_carrier(const srslte_carrier_nr_t* carrier)
 
 void cc_worker::set_tti(uint32_t tti)
 {
-  dl_slot_cfg.idx = tti;
+  dl_slot_cfg.idx = TTI_ADD(tti, FDD_HARQ_DELAY_UL_MS);
 }
 
 cf_t* cc_worker::get_tx_buffer(uint32_t antenna_idx)
@@ -155,4 +153,4 @@ bool cc_worker::work_dl()
 }
 
 } // namespace nr
-} // namespace srsenb
\ No newline at end of file
+} // namespace srsenb
diff --git a/srsenb/src/phy/nr/sf_worker.cc b/srsenb/src/phy/nr/sf_worker.cc
index 41bc4f224..5b0de8804 100644
--- a/srsenb/src/phy/nr/sf_worker.cc
+++ b/srsenb/src/phy/nr/sf_worker.cc
@@ -66,6 +66,7 @@ uint32_t sf_worker::get_buffer_len()
 
 void sf_worker::set_tti(uint32_t tti)
 {
+  log_h->step(tti);
   for (auto& w : cc_workers) {
     w->set_tti(tti);
   }
diff --git a/srsenb/src/phy/phy_common.cc b/srsenb/src/phy/phy_common.cc
index 6d895fe1b..bbd30bf5e 100644
--- a/srsenb/src/phy/phy_common.cc
+++ b/srsenb/src/phy/phy_common.cc
@@ -127,8 +127,10 @@ void phy_common::worker_end(void* tx_sem_id, srslte::rf_buffer_t& buffer, srslte
     nr_tx_buffer_ready = true;
     semaphore.release();
     return;
-  } else if (nr_tx_buffer_ready) {
-    // ... otherwise, append NR baseband from saved buffer if available
+  }
+
+  // ... otherwise, append NR base-band from saved buffer if available
+  if (nr_tx_buffer_ready) {
     uint32_t j = 0;
     for (uint32_t i = 0; i < SRSLTE_MAX_CHANNELS; i++) {
       if (buffer.get(i) == nullptr) {
diff --git a/srsenb/src/phy/txrx.cc b/srsenb/src/phy/txrx.cc
index a0821112d..3e601a113 100644
--- a/srsenb/src/phy/txrx.cc
+++ b/srsenb/src/phy/txrx.cc
@@ -185,6 +185,7 @@ void txrx::run_thread()
 
     // Launch NR worker only if available
     if (nr_worker != nullptr) {
+      nr_worker->set_tti(tti);
       worker_com->semaphore.push(nr_worker);
       nr_workers->start_worker(nr_worker);
     }
diff --git a/srsue/hdr/phy/nr/cc_worker.h b/srsue/hdr/phy/nr/cc_worker.h
index bff0e0d13..a51dbdab3 100644
--- a/srsue/hdr/phy/nr/cc_worker.h
+++ b/srsue/hdr/phy/nr/cc_worker.h
@@ -76,6 +76,7 @@ private:
   uint32_t                            cc_idx      = 0;
   std::array<cf_t*, SRSLTE_MAX_PORTS> rx_buffer   = {};
   std::array<cf_t*, SRSLTE_MAX_PORTS> tx_buffer   = {};
+  uint32_t                            buffer_sz   = 0;
   phy_nr_state*                       phy_state   = nullptr;
   srslte_ue_dl_nr_t                   ue_dl       = {};
   srslte::log*                        log_h       = nullptr;
diff --git a/srsue/src/main.cc b/srsue/src/main.cc
index e5b918ae3..2be8bb912 100644
--- a/srsue/src/main.cc
+++ b/srsue/src/main.cc
@@ -426,7 +426,7 @@ static int parse_args(all_args_t* args, int argc, char* argv[])
     ("vnf.type", bpo::value<string>(&args->phy.vnf_args.type)->default_value("ue"), "VNF instance type [gnb,ue]")
     ("vnf.addr", bpo::value<string>(&args->phy.vnf_args.bind_addr)->default_value("localhost"), "Address to bind VNF interface")
     ("vnf.port", bpo::value<uint16_t>(&args->phy.vnf_args.bind_port)->default_value(3334), "Bind port")
-    ("nr.nof_carriers", bpo::value<uint32_t>(&args->phy.nof_nr_carriers)->default_value(1), "Number of NR carriers")
+    ("nr.nof_carriers", bpo::value<uint32_t>(&args->phy.nof_nr_carriers)->default_value(0), "Number of NR carriers")
     ("nr.nof_prb", bpo::value<uint32_t>(&args->phy.nr_nof_prb)->default_value(50), "NR carrier bandwidth")
     ("nr.freq", bpo::value<double>(&args->phy.nr_freq_hz)->default_value(2630e6), "NR carrier bandwidth")
     ;
diff --git a/srsue/src/phy/nr/cc_worker.cc b/srsue/src/phy/nr/cc_worker.cc
index 9d7fd644a..3b7343d55 100644
--- a/srsue/src/phy/nr/cc_worker.cc
+++ b/srsue/src/phy/nr/cc_worker.cc
@@ -31,10 +31,10 @@ cc_worker::cc_worker(uint32_t cc_idx_, srslte::log* log, phy_nr_state* phy_state
   cf_t* buffer_c[SRSLTE_MAX_PORTS] = {};
 
   // Allocate buffers
-  uint32_t sf_len = SRSLTE_SF_LEN_PRB(phy_state->args.dl.nof_max_prb);
+  buffer_sz = SRSLTE_SF_LEN_PRB(phy_state->args.dl.nof_max_prb) * 5;
   for (uint32_t i = 0; i < phy_state_->args.dl.nof_rx_antennas; i++) {
-    rx_buffer[i] = srslte_vec_cf_malloc(sf_len);
-    tx_buffer[i] = srslte_vec_cf_malloc(sf_len);
+    rx_buffer[i] = srslte_vec_cf_malloc(buffer_sz);
+    tx_buffer[i] = srslte_vec_cf_malloc(buffer_sz);
     buffer_c[i]  = rx_buffer[i];
   }
 
@@ -93,7 +93,7 @@ cf_t* cc_worker::get_rx_buffer(uint32_t antenna_idx)
 
 uint32_t cc_worker::get_buffer_len()
 {
-  return rx_buffer.size();
+  return buffer_sz;
 }
 
 bool cc_worker::work_dl()
diff --git a/srsue/src/phy/nr/sf_worker.cc b/srsue/src/phy/nr/sf_worker.cc
index d1eaf8498..1c8aa3deb 100644
--- a/srsue/src/phy/nr/sf_worker.cc
+++ b/srsue/src/phy/nr/sf_worker.cc
@@ -57,6 +57,7 @@ uint32_t sf_worker::get_buffer_len()
 
 void sf_worker::set_tti(uint32_t tti)
 {
+  log_h->step(tti);
   for (auto& w : cc_workers) {
     w->set_tti(tti);
   }
diff --git a/srsue/src/phy/sync.cc b/srsue/src/phy/sync.cc
index bd3aaf96b..a1099f04d 100644
--- a/srsue/src/phy/sync.cc
+++ b/srsue/src/phy/sync.cc
@@ -65,7 +65,8 @@ void sync::init(srslte::radio_interface_phy* _radio,
   worker_com      = _worker_com;
   prach_buffer    = _prach_buffer;
 
-  nof_rf_channels = worker_com->args->nof_lte_carriers * worker_com->args->nof_rx_ant;
+  nof_rf_channels =
+      (worker_com->args->nof_lte_carriers + worker_com->args->nof_nr_carriers) * worker_com->args->nof_rx_ant;
   if (nof_rf_channels == 0 || nof_rf_channels > SRSLTE_MAX_CHANNELS) {
     Error("SYNC:  Invalid number of RF channels (%d)\n", nof_rf_channels);
     return;
@@ -507,6 +508,7 @@ void sync::run_camping_in_sync_state(lte::sf_worker*      lte_worker,
 
   // Start NR worker only if present
   if (nr_worker != nullptr) {
+    nr_worker->set_tti(tti);
     nr_worker_pool->start_worker(nr_worker);
   }
 }