diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd
index cc4b813b0501aab5a16e2fc3f0d4b966970829ca..5ad34911879d630b2c23dbf74e9e34cb7ad6cdf8 100644
--- a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd
@@ -147,6 +147,8 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
   CONSTANT c_bsn_align_xoff_timeout : NATURAL :=  c_bsn_align_latency * 2  * c_block_period;  -- flush factor 2 longer than needed
   CONSTANT c_dp_fifo_size           : NATURAL := (c_bsn_align_latency + 5) * c_block_size;    -- be able to fit blocks for as long as sop time out;
   CONSTANT c_dp_fifo_fill           : NATURAL := c_block_size;
+  CONSTANT c_nof_blocks_per_sync    : NATURAL := 800000;
+  CONSTANT c_bsn_sync_time_out      : NATURAL := c_block_period * c_nof_blocks_per_sync; 
 
   -- Re- and Deinterleaver
   CONSTANT c_use_complex            : BOOLEAN := TRUE;
@@ -158,7 +160,7 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
   CONSTANT c_nof_pre_mult_folds     : NATURAL := 1; 
   CONSTANT c_conjugate              : BOOLEAN := TRUE; --FIXME: Used for verification/validation (phase shifts) in first stages but should be set to FALSE for final version.
   CONSTANT c_nof_channels           : NATURAL := 64;
-  CONSTANT c_integration_period     : NATURAL := 12207;
+  CONSTANT c_integration_period     : NATURAL := c_nof_blocks_per_sync/c_nof_channels; --12207;
   CONSTANT c_nof_visibilities       : NATURAL := (c_nof_inputs*(c_nof_inputs+1))/2;
   -- . Inter Channel Delay:
   --   . With no inter channel output delay, channels are output back-to-back, creating a short full valid burst of 64 channels (12.8 Gbps burst, 158Mbps on average).
@@ -585,6 +587,7 @@ BEGIN
   u_dp_bsn_monitor : ENTITY dp_lib.mms_dp_bsn_monitor
   GENERIC MAP (
     g_nof_streams        => 5,
+    g_sync_timeout       => c_bsn_sync_time_out,
     g_log_first_bsn      => TRUE
   )
   PORT MAP (