diff --git a/applications/apertif/designs/apertif_unb1_fn_beamformer/src/vhdl/apertif_unb1_fn_beamformer.vhd b/applications/apertif/designs/apertif_unb1_fn_beamformer/src/vhdl/apertif_unb1_fn_beamformer.vhd
index f402d033eae8030cc457834075c18e1f41e01573..a94c0bcc9776d71e4af49471b2b760ff55dd7e7f 100644
--- a/applications/apertif/designs/apertif_unb1_fn_beamformer/src/vhdl/apertif_unb1_fn_beamformer.vhd
+++ b/applications/apertif/designs/apertif_unb1_fn_beamformer/src/vhdl/apertif_unb1_fn_beamformer.vhd
@@ -181,9 +181,9 @@ ARCHITECTURE str OF apertif_unb1_fn_beamformer IS
   CONSTANT c_rd_fifo_depth      : NATURAL := 256;
   CONSTANT c_ddr3_mem_w         : NATURAL := 256;
   CONSTANT c_ena_pre_transp     : BOOLEAN := TRUE;  
-  CONSTANT c_wr_chunksize       : NATURAL := g_bf.nof_weights;
-  CONSTANT c_rd_chunksize       : NATURAL := 32;
-  CONSTANT c_rd_nof_chunks      : NATURAL := 8; 
+  CONSTANT c_wr_chunksize       : NATURAL := 240; --g_bf.nof_weights;
+  CONSTANT c_rd_chunksize       : NATURAL := 16;  --32;
+  CONSTANT c_rd_nof_chunks      : NATURAL := 15;  --8
   CONSTANT c_rd_interval        : NATURAL := c_rd_chunksize;
   CONSTANT c_gapsize            : NATURAL := 0; 
   CONSTANT c_nof_blocks         : NATURAL := sel_a_b(g_sim, 32, 800000);