diff --git a/openair1/PHY/LTE_TRANSPORT/if4_tools.c b/openair1/PHY/LTE_TRANSPORT/if4_tools.c
index 4ecdd6688d..97f3cd9ae9 100755
--- a/openair1/PHY/LTE_TRANSPORT/if4_tools.c
+++ b/openair1/PHY/LTE_TRANSPORT/if4_tools.c
@@ -119,7 +119,7 @@ void send_IF4p5(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type
     gen_IF4p5_ul_header(packet_header, frame, subframe);
 
     for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {			
-      LOG_I(PHY,"IF4p5_PULFFT: frame %d, subframe %d, symbol %d\n",frame,subframe,symbol_id);
+      LOG_D(PHY,"IF4p5_PULFFT: frame %d, subframe %d, symbol %d\n",frame,subframe,symbol_id);
       for (element_id=0; element_id<db_halflength; element_id++) {
         i = (uint16_t*) &rxdataF[0][blockoffsetF+element_id];
         data_block[element_id] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
@@ -145,7 +145,7 @@ void send_IF4p5(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type
     }		
   } else if (packet_type == IF4p5_PRACH) {
     // FIX: hard coded prach samples length
-    LOG_I(PHY,"IF4p5_PRACH: frame %d, subframe %d\n",frame,subframe);
+    LOG_D(PHY,"IF4p5_PRACH: frame %d, subframe %d\n",frame,subframe);
     db_fulllength = 840*2;
     if (eth->flags == ETH_RAW_IF4p5_MODE) {
       packet_header = (IF4p5_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
@@ -234,7 +234,7 @@ void recv_IF4p5(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_t
   if (*packet_type == IF4p5_PDLFFT) {          
     *symbol_number = ((packet_header->frame_status)>>26)&0x000f;         
 
-    LOG_I(PHY,"DL_IF4p5: CC_id %d : frame %d, subframe %d, symbol %d\n",eNB->CC_id,*frame,*subframe,*symbol_number);
+    LOG_D(PHY,"DL_IF4p5: CC_id %d : frame %d, subframe %d, symbol %d\n",eNB->CC_id,*frame,*subframe,*symbol_number);
 
     slotoffsetF = (*symbol_number)*(fp->ofdm_symbol_size) + (*subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
     blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1; 
diff --git a/targets/RT/USER/lte-enb.c b/targets/RT/USER/lte-enb.c
index 97c877c8ea..eadff1ffe3 100644
--- a/targets/RT/USER/lte-enb.c
+++ b/targets/RT/USER/lte-enb.c
@@ -908,9 +908,9 @@ void rx_rf(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
   }
   proc->frame_rx    = ((proc->timestamp_rx-eNB->ts_offset) / (fp->samples_per_tti*10))&1023;
   proc->subframe_rx = ((proc->timestamp_rx-eNB->ts_offset) / fp->samples_per_tti)%10;
-  proc->frame_rx    = (proc->frame_rx+proc->frame_offset)%1023;
+  proc->frame_rx    = (proc->frame_rx+proc->frame_offset)&1023;
   proc->frame_tx    = proc->frame_rx;
-  if (proc->subframe_rx > 5) proc->frame_tx=(proc->frame_tx+1)%1023;
+  if (proc->subframe_rx > 5) proc->frame_tx=(proc->frame_tx+1)&1023;
   // synchronize first reception to frame 0 subframe 0
 
   proc->timestamp_tx = proc->timestamp_rx+(4*fp->samples_per_tti);
@@ -921,9 +921,9 @@ void rx_rf(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
       LOG_E(PHY,"rx_rf: Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->timestamp_rx,proc->subframe_rx,*subframe);
       exit_fun("Exiting");
     }
-    int f2 = *frame+proc->frame_offset;    
+    int f2 = (*frame+proc->frame_offset)&1023;    
     if (proc->frame_rx != f2) {
-      LOG_E(PHY,"rx_rf: Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",proc->timestamp_rx,proc->frame_rx,*frame);
+      LOG_E(PHY,"rx_rf: Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->frame_rx %d frame %d, frame_offset %d, f2 %d)\n",proc->timestamp_rx,proc->frame_rx,*frame,proc->frame_offset,f2);
       exit_fun("Exiting");
     }
   } else {