diff --git a/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd b/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd
index b96a84e1fdf6af18be24f5692ae1af1c6bb08246..fc9491cb8fda0f72a80c4f27511b66079a8a400e 100644
--- a/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd
+++ b/applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd
@@ -157,7 +157,8 @@ PACKAGE sdp_pkg is
 
   -- DC gain of WPFB FIR filter obtained from applications/lofar2/model/run_pfir_coef.m using application = 'lofar_subband'
   -- Not used in RTL, only used in test benches to verify expected suband levels
-  CONSTANT c_sdp_wpfb_fir_filter_dc_gain : REAL := 0.994817;
+  CONSTANT c_sdp_wpfb_fir_filter_dc_gain    : REAL := 0.994817;
+  CONSTANT c_sdp_wpfb_subband_sp_ampl_ratio : REAL := 8.0 * c_sdp_wpfb_fir_filter_dc_gain;  -- ~= 8 for unit FIR DC gain, depends on internal WPFB quantization and FIR coefficients
 
   -----------------------------------------------------------------------------
   -- Statistics offload