belongs to: this design: 4xQSFP + 4xBack. Synthese ok

boards/uniboard2/libraries/unb2_board/src/vhdl/unb2_board_pkg.vhd

@@ -71,7 +71,8 @@ PACKAGE unb2_board_pkg IS
     i2c_w                             : NATURAL;
   END RECORD;
 
-  CONSTANT c_unb2_board_tr_back              : t_c_unb2_board_tr := (1, 48, 3); -- per node: 1 bus with 48 channels
+  --CONSTANT c_unb2_board_tr_back              : t_c_unb2_board_tr := (1, 48, 3); -- per node: 1 bus with 48 channels
+  CONSTANT c_unb2_board_tr_back              : t_c_unb2_board_tr := (1, 4, 3); -- per node: 1 bus with 48 channels
   CONSTANT c_unb2_board_tr_ring              : t_c_unb2_board_tr := (2, 12, 0); -- per node: 2 buses with 12 channels
   CONSTANT c_unb2_board_tr_qsfp              : t_c_unb2_board_tr := (6, 4,  6); -- per node: 6 buses with 4 channels
   CONSTANT c_unb2_board_tr_qsfp_nof_leds     : NATURAL := c_unb2_board_tr_qsfp.nof_bus * 2; -- 2 leds per qsfp