diff --git a/applications/apertif/designs/apertif_unb1_correlator/tb/vhdl/tb_node_apertif_unb1_correlator_processing.vhd b/applications/apertif/designs/apertif_unb1_correlator/tb/vhdl/tb_node_apertif_unb1_correlator_processing.vhd
index f7aec5eae6c71ba3362be1f1e70b49488a664ae9..253a1d77a0e3852b20dca79f58ea7ff717a4b444 100644
--- a/applications/apertif/designs/apertif_unb1_correlator/tb/vhdl/tb_node_apertif_unb1_correlator_processing.vhd
+++ b/applications/apertif/designs/apertif_unb1_correlator/tb/vhdl/tb_node_apertif_unb1_correlator_processing.vhd
@@ -33,9 +33,11 @@
 --     tp_sosi_arr = CB<tp>[t][bu_i][ti] @ 1/c_interleave_factor
 --
 --   The BG in this tb creates bg_sosi in the block format of [tc] and the
---   number of blocks per sync interval is [bu_i][t_c]:
+--   number of blocks per sync interval is [bsn] = [bu_i][t_c]:
 --
---     bg_sosi_arr = CB<tp>[t][bu_i][t_c][tc] @ 1/c_interleave_factor
+--     bg_sosi_arr = CB<tp>[t][bsn][tc] @ 1/c_interleave_factor
+--                   CB<tp>[t][bu_i][t_c][tc] @ 1/c_interleave_factor
+--                   CB<tp>[t][bu_i][ti] @ 1/c_interleave_factor
 --
 --   The c_interleave_factor factor is 2, folding the input data for pairs
 --   of TP yields: