diff --git a/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/tb_unb1_test_10GbE.vhd b/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/tb_unb1_test_10GbE.vhd
index 9b8f7d9e49a79d77b43428212041eb656a41ff97..641207066e92e4eb2ecdf9dcea5d52a588114795 100644
--- a/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/tb_unb1_test_10GbE.vhd
+++ b/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/tb_unb1_test_10GbE.vhd
@@ -36,6 +36,7 @@ ARCHITECTURE tb OF tb_unb1_test_10GbE IS
 BEGIN
   u_tb_unb1_test : ENTITY unb1_test_lib.tb_unb1_test
   GENERIC MAP (
-    g_design_name => "unb1_test_10GbE"
+    g_design_name => "unb1_test_10GbE",
+    g_sim_node_nr => 0
   );
 END tb;
diff --git a/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/unb1_test_10GbE.vhd b/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/unb1_test_10GbE.vhd
index 1779dd506b6ed8eeaae32ad147082954adf49efd..ee36e6b9e357f3d6ec9fd4a303bd85f97d15f933 100644
--- a/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/unb1_test_10GbE.vhd
+++ b/boards/uniboard1/designs/unb1_test/revisions/unb1_test_10GbE/unb1_test_10GbE.vhd
@@ -30,7 +30,7 @@ ENTITY unb1_test_10GbE IS
     g_design_note : STRING  := "Test Design with 10GbE";
     g_sim         : BOOLEAN := FALSE; --Overridden by TB
     g_sim_unb_nr  : NATURAL := 0;
-    g_sim_node_nr : NATURAL := 0;
+    g_sim_node_nr : NATURAL := 0;  -- FN0
     g_stamp_date  : NATURAL := 0;  -- Date (YYYYMMDD) -- set by QSF
     g_stamp_time  : NATURAL := 0;  -- Time (HHMMSS)   -- set by QSF
     g_stamp_svn   : NATURAL := 0   -- SVN revision    -- set by QSF
diff --git a/boards/uniboard1/designs/unb1_test/revisions/unb1_test_lpbk/unb1_test_lpbk.vhd b/boards/uniboard1/designs/unb1_test/revisions/unb1_test_lpbk/unb1_test_lpbk.vhd
index 1066f91b7925201fd246e8f2a1708217e7294058..6b5c09729eff0cb798cd1bad7e8a176fa8c2552f 100644
--- a/boards/uniboard1/designs/unb1_test/revisions/unb1_test_lpbk/unb1_test_lpbk.vhd
+++ b/boards/uniboard1/designs/unb1_test/revisions/unb1_test_lpbk/unb1_test_lpbk.vhd
@@ -30,7 +30,7 @@ ENTITY unb1_test_lpbk IS
     g_design_note : STRING  := "Test Design with loopback";
     g_sim         : BOOLEAN := FALSE; --Overridden by TB
     g_sim_unb_nr  : NATURAL := 0;
-    g_sim_node_nr : NATURAL := 0;
+    g_sim_node_nr : NATURAL := 7;
     g_stamp_date  : NATURAL := 0;  -- Date (YYYYMMDD) -- set by QSF
     g_stamp_time  : NATURAL := 0;  -- Time (HHMMSS)   -- set by QSF
     g_stamp_svn   : NATURAL := 0   -- SVN revision    -- set by QSF
diff --git a/boards/uniboard1/designs/unb1_test/src/vhdl/unb1_test.vhd b/boards/uniboard1/designs/unb1_test/src/vhdl/unb1_test.vhd
index 655243c41141d2b30b80c4f9aa091175b46198b8..2d10b3fb830b5c8ad929f0ef8e5c40372094da3e 100644
--- a/boards/uniboard1/designs/unb1_test/src/vhdl/unb1_test.vhd
+++ b/boards/uniboard1/designs/unb1_test/src/vhdl/unb1_test.vhd
@@ -47,7 +47,7 @@ ENTITY unb1_test IS
   );
   PORT (
     -- GENERAL
-    --CLK          : IN    STD_LOGIC; -- System Clock - not used as the SOPC generates dp_clk.
+  --CLK          : IN    STD_LOGIC; -- System Clock - not used as the SOPC generates dp_clk.
     PPS          : IN    STD_LOGIC; -- System Sync
     WDI          : OUT   STD_LOGIC; -- Watchdog Clear
     INTA         : INOUT STD_LOGIC; -- FPGA interconnect line
@@ -128,10 +128,12 @@ ARCHITECTURE str OF unb1_test IS
 
 
   -- Block generator
-  CONSTANT c_bg_block_size              : NATURAL := 900;
+  --CONSTANT c_bg_block_size              : NATURAL := 900;
+  CONSTANT c_bg_block_size              : NATURAL := 700;
   CONSTANT c_bg_gapsize                 : NATURAL := 100;
   CONSTANT c_bg_blocks_per_sync         : NATURAL := sel_a_b(g_sim, 10, 200000); -- 200000*(900+100) = 200000000 cycles = 1 second
-  CONSTANT c_bg_ctrl                    : t_diag_block_gen := ('1',                                -- enable             
+  --CONSTANT c_bg_ctrl                    : t_diag_block_gen := ('1',                                -- enable             
+  CONSTANT c_bg_ctrl                    : t_diag_block_gen := ('0',                                -- enable             
                                                                '0',                                -- enable_sync        
                                                               TO_UVEC(     c_bg_block_size, c_diag_bg_samples_per_packet_w),
                                                               TO_UVEC(c_bg_blocks_per_sync, c_diag_bg_blocks_per_sync_w),
@@ -452,68 +454,68 @@ BEGIN
     g_hdr_field_arr => c_hdr_field_arr
    )
   PORT MAP(  
-    xo_clk                   => xo_clk,       
-    xo_rst_n                 => xo_rst_n,     
-    xo_rst                   => xo_rst,       
+    xo_clk                         => xo_clk,       
+    xo_rst_n                       => xo_rst_n,     
+    xo_rst                         => xo_rst,       
 
-    mm_rst                   => mm_rst,
-    mm_clk                   => mm_clk,       
-    mm_locked                => mm_locked,    
+    mm_rst                         => mm_rst,
+    mm_clk                         => mm_clk,       
+    mm_locked                      => mm_locked,    
 
-    epcs_clk                 => epcs_clk,
-    cal_rec_clk              => cal_rec_clk,
-    dp_clk                   => dp_clk,
+    epcs_clk                       => epcs_clk,
+    cal_rec_clk                    => cal_rec_clk,
+    dp_clk                         => dp_clk,
 
 
     -- PIOs
-    pout_wdi                 => pout_wdi,
+    pout_wdi                       => pout_wdi,
 
     -- Manual WDI override
-    reg_wdi_mosi             => reg_wdi_mosi,
-    reg_wdi_miso             => reg_wdi_miso,
+    reg_wdi_mosi                   => reg_wdi_mosi,
+    reg_wdi_miso                   => reg_wdi_miso,
 
     -- system_info
-    reg_unb_system_info_mosi => reg_unb_system_info_mosi,
-    reg_unb_system_info_miso => reg_unb_system_info_miso,
-    rom_unb_system_info_mosi => rom_unb_system_info_mosi,
-    rom_unb_system_info_miso => rom_unb_system_info_miso, 
+    reg_unb_system_info_mosi       => reg_unb_system_info_mosi,
+    reg_unb_system_info_miso       => reg_unb_system_info_miso,
+    rom_unb_system_info_mosi       => rom_unb_system_info_mosi,
+    rom_unb_system_info_miso       => rom_unb_system_info_miso, 
 
     -- UniBoard I2C sensors
-    reg_unb_sens_mosi        => reg_unb_sens_mosi,
-    reg_unb_sens_miso        => reg_unb_sens_miso, 
+    reg_unb_sens_mosi              => reg_unb_sens_mosi,
+    reg_unb_sens_miso              => reg_unb_sens_miso, 
  
     -- PPSH
-    reg_ppsh_mosi            => reg_ppsh_mosi,
-    reg_ppsh_miso            => reg_ppsh_miso, 
+    reg_ppsh_mosi                  => reg_ppsh_mosi,
+    reg_ppsh_miso                  => reg_ppsh_miso, 
   
     -- eth1g
-    eth1g_tse_clk            => eth1g_tse_clk,
-    eth1g_mm_rst             => eth1g_mm_rst,
-    eth1g_tse_mosi           => eth1g_tse_mosi,
-    eth1g_tse_miso           => eth1g_tse_miso,
-    eth1g_reg_mosi           => eth1g_reg_mosi,
-    eth1g_reg_miso           => eth1g_reg_miso,
-    eth1g_reg_interrupt      => eth1g_reg_interrupt,
-    eth1g_ram_mosi           => eth1g_ram_mosi,
-    eth1g_ram_miso           => eth1g_ram_miso,
+    eth1g_tse_clk                  => eth1g_tse_clk,
+    eth1g_mm_rst                   => eth1g_mm_rst,
+    eth1g_tse_mosi                 => eth1g_tse_mosi,
+    eth1g_tse_miso                 => eth1g_tse_miso,
+    eth1g_reg_mosi                 => eth1g_reg_mosi,
+    eth1g_reg_miso                 => eth1g_reg_miso,
+    eth1g_reg_interrupt            => eth1g_reg_interrupt,
+    eth1g_ram_mosi                 => eth1g_ram_mosi,
+    eth1g_ram_miso                 => eth1g_ram_miso,
 
     -- EPCS read
-    reg_dpmm_data_mosi       => reg_dpmm_data_mosi,
-    reg_dpmm_data_miso       => reg_dpmm_data_miso,
-    reg_dpmm_ctrl_mosi       => reg_dpmm_ctrl_mosi,
-    reg_dpmm_ctrl_miso       => reg_dpmm_ctrl_miso,
+    reg_dpmm_data_mosi             => reg_dpmm_data_mosi,
+    reg_dpmm_data_miso             => reg_dpmm_data_miso,
+    reg_dpmm_ctrl_mosi             => reg_dpmm_ctrl_mosi,
+    reg_dpmm_ctrl_miso             => reg_dpmm_ctrl_miso,
 
     -- EPCS write
-    reg_mmdp_data_mosi       => reg_mmdp_data_mosi,
-    reg_mmdp_data_miso       => reg_mmdp_data_miso,
-    reg_mmdp_ctrl_mosi       => reg_mmdp_ctrl_mosi,
-    reg_mmdp_ctrl_miso       => reg_mmdp_ctrl_miso,
+    reg_mmdp_data_mosi             => reg_mmdp_data_mosi,
+    reg_mmdp_data_miso             => reg_mmdp_data_miso,
+    reg_mmdp_ctrl_mosi             => reg_mmdp_ctrl_mosi,
+    reg_mmdp_ctrl_miso             => reg_mmdp_ctrl_miso,
 
-    reg_epcs_mosi            => reg_epcs_mosi,
-    reg_epcs_miso            => reg_epcs_miso,
+    reg_epcs_mosi                  => reg_epcs_mosi,
+    reg_epcs_miso                  => reg_epcs_miso,
 
-    reg_remu_mosi            => reg_remu_mosi,
-    reg_remu_miso            => reg_remu_miso,
+    reg_remu_mosi                  => reg_remu_mosi,
+    reg_remu_miso                  => reg_remu_miso,
 
     ram_diag_bg_mosi               => ram_diag_bg_mosi,
     ram_diag_bg_miso               => ram_diag_bg_miso,
@@ -540,10 +542,10 @@ BEGIN
     reg_diag_data_buf_mosi         => reg_diag_data_buf_mosi,
     reg_diag_data_buf_miso         => reg_diag_data_buf_miso,
 
-    reg_tr_10GbE_mosi        => reg_tr_10GbE_mosi,
-    reg_tr_10GbE_miso        => reg_tr_10GbE_miso,
-    reg_tr_xaui_mosi         => reg_tr_xaui_mosi,
-    reg_tr_xaui_miso         => reg_tr_xaui_miso
+    reg_tr_10GbE_mosi              => reg_tr_10GbE_mosi,
+    reg_tr_10GbE_miso              => reg_tr_10GbE_miso,
+    reg_tr_xaui_mosi               => reg_tr_xaui_mosi,
+    reg_tr_xaui_miso               => reg_tr_xaui_miso
   );
 
 
@@ -733,7 +735,8 @@ BEGIN
     g_nof_streams  => c_nof_streams,
     g_data_w       => c_data_w,
     g_buf_nof_data => 1024,
-    g_buf_use_sync => TRUE
+    --g_buf_use_sync => TRUE
+    g_buf_use_sync => FALSE
   )
   PORT MAP (
     mm_rst            => mm_rst,
@@ -782,7 +785,7 @@ BEGIN
       g_sim_level     => 1,
       g_nof_macs      => c_nof_streams,
       g_use_mdio      => TRUE,
-      g_mdio_epcs_dis => c_use_pc_target,
+      --g_mdio_epcs_dis => c_use_pc_target,
       g_pkt_len       => c_def_10GbE_block_size
     )
     PORT MAP (
diff --git a/boards/uniboard1/designs/unb1_test/tb/vhdl/tb_unb1_test.vhd b/boards/uniboard1/designs/unb1_test/tb/vhdl/tb_unb1_test.vhd
index 279315a4fc3d3920e69ed4e00f16792f69376383..16bc28cd5539d1e05e711c08969e2b8b192e5dce 100644
--- a/boards/uniboard1/designs/unb1_test/tb/vhdl/tb_unb1_test.vhd
+++ b/boards/uniboard1/designs/unb1_test/tb/vhdl/tb_unb1_test.vhd
@@ -51,17 +51,16 @@ USE common_lib.tb_common_pkg.ALL;
 
 ENTITY tb_unb1_test IS
     GENERIC (
-      g_design_name : STRING  := "unb1_test"
+      g_design_name : STRING  := "unb1_test";
+      g_sim_unb_nr  : NATURAL := 0; -- UniBoard 0
+      g_sim_node_nr : NATURAL := 7  -- Back node 3
     );
 END tb_unb1_test;
 
 ARCHITECTURE tb OF tb_unb1_test IS
 
   CONSTANT c_sim             : BOOLEAN := TRUE;
-
-  CONSTANT c_unb_nr          : NATURAL := 0; -- UniBoard 0
-  CONSTANT c_node_nr         : NATURAL := 7; -- Back node 3
-  CONSTANT c_id              : STD_LOGIC_VECTOR(7 DOWNTO 0) := TO_UVEC(c_unb_nr, c_unb1_board_nof_uniboard_w) & TO_UVEC(c_node_nr, c_unb1_board_nof_chip_w);
+  CONSTANT c_id              : STD_LOGIC_VECTOR(7 DOWNTO 0) := TO_UVEC(g_sim_unb_nr, c_unb1_board_nof_uniboard_w) & TO_UVEC(g_sim_node_nr, c_unb1_board_nof_chip_w);
 
   CONSTANT c_version         : STD_LOGIC_VECTOR(1 DOWNTO 0) := "00";
   CONSTANT c_fw_version      : t_unb1_board_fw_version := (1, 0);
@@ -69,7 +68,7 @@ ARCHITECTURE tb OF tb_unb1_test IS
   CONSTANT c_cable_delay     : TIME := 12 ns;
   CONSTANT c_eth_clk_period  : TIME := 40 ns;  -- 25 MHz XO on UniBoard
   CONSTANT c_clk_period      : TIME := 5 ns; 
-  CONSTANT c_tr_clk_period   : TIME := 40 ns; 
+  CONSTANT c_sa_clk_period   : TIME := 6.4 ns; 
   CONSTANT c_pps_period      : NATURAL := 1000; 
 
   -- DUT
@@ -93,36 +92,13 @@ ARCHITECTURE tb OF tb_unb1_test IS
   SIGNAL sens_sda            : STD_LOGIC;
 
   -- 10GbE
-  SIGNAL tr_clk              : STD_LOGIC := '0';
+  SIGNAL sa_clk              : STD_LOGIC := '1';
 
   -- Serial I/O
-  SIGNAL SI_FN_0_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL SI_FN_0_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-  SIGNAL SI_FN_0_TXp         : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL SI_FN_0_RXp         : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-
-  SIGNAL SI_FN_1_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL SI_FN_1_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-  SIGNAL SI_FN_2_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL SI_FN_2_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-  SIGNAL SI_FN_3_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL SI_FN_3_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-
-  SIGNAL SI_FN_0_CNTRL       : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.cntrl_w-1 DOWNTO 0); -- (0 = LASI; 1=MDC; 2=MDIO)
-  SIGNAL SI_FN_1_CNTRL       : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.cntrl_w-1 DOWNTO 0);
-  SIGNAL SI_FN_2_CNTRL       : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.cntrl_w-1 DOWNTO 0);
-  SIGNAL SI_FN_3_CNTRL       : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.cntrl_w-1 DOWNTO 0);
-  SIGNAL SI_FN_RSTN          : STD_LOGIC := '1'; -- ResetN is pulled up in the Vitesse chip, but pulled down again by external 1k resistor.
-
-  SIGNAL BN_BI_0_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL BN_BI_0_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-  SIGNAL BN_BI_1_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL BN_BI_1_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-  SIGNAL BN_BI_2_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL BN_BI_2_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-  SIGNAL BN_BI_3_TX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
-  SIGNAL BN_BI_3_RX          : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0) := (OTHERS=>'0');
-
+  SIGNAL si_fn_lpbk_0        : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
+  SIGNAL si_fn_lpbk_1        : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
+  SIGNAL si_fn_lpbk_2        : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
+  SIGNAL si_fn_lpbk_3        : STD_LOGIC_VECTOR(c_unb1_board_ci.tr.bus_w-1 DOWNTO 0);
 
   -- Model I2C sensor slaves as on the UniBoard
   CONSTANT c_fpga_temp_address   : STD_LOGIC_VECTOR(6 DOWNTO 0) := "0011000";  -- MAX1618 address LOW LOW
@@ -143,7 +119,7 @@ BEGIN
   ----------------------------------------------------------------------------
   clk     <= NOT clk     AFTER c_clk_period/2;     -- External clock (200 MHz)
   eth_clk <= NOT eth_clk AFTER c_eth_clk_period/2; -- Ethernet ref clock (25 MHz)
-  tr_clk  <= NOT tr_clk  AFTER c_tr_clk_period/2;  -- Ethernet ref clock (25 MHz)
+  sa_clk  <= NOT sa_clk  AFTER c_sa_clk_period/2;  -- sa clock (156.25 MHz)
   
   INTA <= 'H';  -- pull up
   INTB <= 'H';  -- pull up
@@ -161,19 +137,14 @@ BEGIN
   ------------------------------------------------------------------------------  
   eth_rxp <= TRANSPORT eth_txp AFTER c_cable_delay;
 
-  ------------------------------------------------------------------------------
-  -- 10GbE Loopback model
-  ------------------------------------------------------------------------------  
-  SI_FN_0_RXp <= TRANSPORT SI_FN_0_TXp;-- AFTER c_cable_delay;
-  
   ------------------------------------------------------------------------------
   -- DUT
   ------------------------------------------------------------------------------
   u_unb1_test : ENTITY work.unb1_test
     GENERIC MAP (
       g_sim         => c_sim,
-      g_sim_unb_nr  => c_unb_nr,
-      g_sim_node_nr => c_node_nr,
+      g_sim_unb_nr  => g_sim_unb_nr,
+      g_sim_node_nr => g_sim_node_nr,
       g_design_name => g_design_name
     )
     PORT MAP (
@@ -198,18 +169,17 @@ BEGIN
       ETH_SGOUT   => eth_txp,
 
       -- Transceiver clocks
-      SA_CLK      => tr_clk,
-      --SB_CLK      => tr_clk,
+      SA_CLK      => sa_clk,
 
       -- Serial I/O
-      SI_FN_0_TX  => SI_FN_0_TXp,
-      SI_FN_0_RX  => SI_FN_0_RXp,
-      SI_FN_1_TX  => OPEN,
-      SI_FN_1_RX  => (OTHERS=>'0'),
-      SI_FN_2_TX  => OPEN,
-      SI_FN_2_RX  => (OTHERS=>'0'),
-      SI_FN_3_TX  => OPEN,
-      SI_FN_3_RX  => (OTHERS=>'0'),
+      SI_FN_0_TX  => si_fn_lpbk_0,
+      SI_FN_0_RX  => si_fn_lpbk_0,
+      SI_FN_1_TX  => si_fn_lpbk_1,
+      SI_FN_1_RX  => si_fn_lpbk_1,
+      SI_FN_2_TX  => si_fn_lpbk_2,
+      SI_FN_2_RX  => si_fn_lpbk_2,
+      SI_FN_3_TX  => si_fn_lpbk_3,
+      SI_FN_3_RX  => si_fn_lpbk_3,
 
       BN_BI_0_TX  => OPEN,
       BN_BI_0_RX  => (OTHERS=>'0'),