diff --git a/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd b/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd
index 68bd999994459b6339d4c18df7797f499cb7cfaa..f85d717040e27ff6077d8db911070a01d1efbe1e 100644
--- a/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd
+++ b/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd
@@ -26,6 +26,7 @@
 -- Description: See [1]
 -- References:
 -- . [1] https://support.astron.nl/confluence/display/L2M/L3+SDP+Decision%3A+SDP+Parameter+definitions
+-- . [2] https://support.astron.nl/confluence/display/L2M/L2+STAT+Decision%3A+Timing+in+Station
 -------------------------------------------------------------------------------
 library IEEE, common_lib, rTwoSDF_lib, fft_lib, filter_lib, wpfb_lib, diag_lib, tech_jesd204b_lib;
   use IEEE.std_logic_1164.all;
@@ -79,6 +80,7 @@ package sdp_pkg is
   constant c_sdp_N_sub                     : natural := 512;
   constant c_sdp_N_sync_rcu                : natural := 1;
   constant c_sdp_N_taps                    : natural := 16;
+  constant c_sdp_N_ring_nof_mac10g         : natural := 3;  -- nof 10GbE per lane in qsfp_0, ring_0, ring_1
   constant c_sdp_P_sq                      : natural := 9;  -- = N_pn / 2 + 1 square correlator cells for XST
   constant c_sdp_P_sum                     : natural := 2;  -- sums of two in ring beamformer adder tree
   constant c_sdp_Q_fft                     : natural := 2;
@@ -93,6 +95,9 @@ package sdp_pkg is
   constant c_sdp_V_si_histogram            : natural := 512;
   constant c_sdp_W_adc                     : natural := 14;
   constant c_sdp_W_adc_jesd                : natural := 16;
+  constant c_sdp_W_ant                     : natural := c_sdp_W_adc * c_sdp_N_pol;  -- = 28
+  constant c_sdp_W_bsn                     : natural := 64;  -- block sequence number [2]
+  constant c_sdp_W_rsn                     : natural := 64;  -- raw sample sequence number [2]
   constant c_sdp_W_fir_coef                : natural := 16;
   constant c_sdp_W_subband                 : natural := 18;
   constant c_sdp_W_crosslet                : natural := 16;
@@ -114,7 +119,6 @@ package sdp_pkg is
   constant c_sdp_W_local_oscillator_fraction  : natural := 15;  -- = p in s(w, p)
   constant c_sdp_W_local_oscillator_magnitude : natural := c_sdp_W_local_oscillator -
                                                            c_sdp_W_local_oscillator_fraction - 1;  -- = 0
-  constant c_sdp_N_ring_nof_mac10g            : natural := 3;  -- for sdp_station_xsub_ring design.
 
   -- Derived constants
   constant c_sdp_FS_adc                  : natural := 2**(c_sdp_W_adc - 1);  -- full scale FS corresponds to amplitude