diff --git a/rtl/controller/src/controller.sv b/rtl/controller/src/controller.sv
index 4c49751..b376b81 100644
--- a/rtl/controller/src/controller.sv
+++ b/rtl/controller/src/controller.sv
@@ -109,9 +109,11 @@ module control #(
     // [63:32]  pulse_period
     // [79:64]  pulse_num
     // [95:80]  pulse_height_raw[15:0]
+    // [127:96] pulse_period_ADC
+    //
     // -------------------------------------------------------------------------
-    (* MARK_DEBUG="true" *) logic [95:0] cfg_bus_eth;
-    logic [95:0] cfg_shift_eth;
+    (* MARK_DEBUG="true" *) logic [127:0] cfg_bus_eth;
+    logic [127:0] cfg_shift_eth;
 
     // ETH-domain parser and control
     typedef enum logic [2:0] {
@@ -278,10 +280,10 @@ module control #(
                         // little endian packing
                         cfg_shift_eth[cfg_byte_cnt*8 +: 8] <= s_axis_tdata;
 
-                        if (cfg_byte_cnt == 4'd11) begin
+                        if (cfg_byte_cnt == 4'd15) begin
                             // this must be the final payload byte
                             if (s_axis_tlast) begin
-                                cfg_bus_eth            <= {s_axis_tdata, cfg_shift_eth[87:0]};
+                                cfg_bus_eth            <= {s_axis_tdata, cfg_shift_eth[119:0]};
                                 cfg_req_toggle_dac_eth <= ~cfg_req_toggle_dac_eth;
                                 cfg_req_toggle_adc_eth <= ~cfg_req_toggle_adc_eth;
                                 cfg_wait_dac_ack       <= 1'b1;
@@ -451,7 +453,7 @@ module control #(
             cfg_req_sync_adc_d <= cfg_req_sync_adc;
 
             if (cfg_req_pulse_adc) begin
-                adc_pulse_period <= cfg_bus_eth[63:32];
+                adc_pulse_period <= cfg_bus_eth[127:96];
                 adc_pulse_num    <= cfg_bus_eth[79:64];
 
                 cfg_ack_toggle_adc <= ~cfg_ack_toggle_adc;
diff --git a/rtl/controller/tests/controller_tb.sv b/rtl/controller/tests/controller_tb.sv
index 8bbce57..d79e079 100644
--- a/rtl/controller/tests/controller_tb.sv
+++ b/rtl/controller/tests/controller_tb.sv
@@ -139,9 +139,10 @@ module tb_control;
         input logic [31:0] pulse_width,
         input logic [31:0] pulse_period,
         input logic [15:0] pulse_num,
-        input logic [15:0] pulse_height_raw
+        input logic [15:0] pulse_height_raw,
+        input logic [31:0] pulse_period_adc
     );
-        logic [95:0] payload;
+        logic [127:0] payload;
         int i;
         begin
             // little-endian payload layout:
@@ -149,12 +150,14 @@ module tb_control;
             // [63:32]  pulse_period
             // [79:64]  pulse_num
             // [95:80]  pulse_height_raw
-            payload = {pulse_height_raw, pulse_num, pulse_period, pulse_width};
+            // [127:96] pulse_period_ADC
+    
+            payload = {pulse_period_adc, pulse_height_raw, pulse_num, pulse_period, pulse_width};
 
             axis_send_byte(8'h88, 1'b0); // CMD_SET_DATA
 
-            for (i = 0; i < 12; i++) begin
-                axis_send_byte(payload[i*8 +: 8], (i == 11));
+            for (i = 0; i < 16; i++) begin
+                axis_send_byte(payload[i*8 +: 8], (i == 15));
             end
         end
     endtask
@@ -219,6 +222,7 @@ module tb_control;
         input logic [31:0] exp_pulse_period,
         input logic [15:0] exp_pulse_num,
         input logic [15:0] exp_pulse_height_raw,
+        input logic [31:0] exp_pulse_period_adc,
         input int max_cycles = 200
     );
         logic [DAC_DATA_WIDTH-1:0] exp_dac_height;
@@ -232,7 +236,7 @@ module tb_control;
                     (dac_pulse_period === exp_pulse_period) &&
                     (dac_pulse_num    === exp_pulse_num   ) &&
                     (dac_pulse_height === exp_dac_height  ) &&
-                    (adc_pulse_period === exp_pulse_period) &&
+                    (adc_pulse_period === exp_pulse_period_adc) &&
                     (adc_pulse_num    === exp_pulse_num   )) begin
                     return;
                 end
@@ -252,6 +256,7 @@ module tb_control;
     logic [31:0] test_pulse_period;
     logic [15:0] test_pulse_num;
     logic [15:0] test_pulse_height_raw;
+    logic [31:0] test_pulse_period_adc;
 
     initial begin
         // defaults
@@ -265,6 +270,7 @@ module tb_control;
         test_pulse_period     = 32'h55667788;
         test_pulse_num        = 16'hA1B2;
         test_pulse_height_raw = 16'h0CDE; // for DAC_DATA_WIDTH=12 => 12'hCDE
+        test_pulse_period_adc = 32'h50607080;
 
         repeat (10) @(posedge eth_clk_in);
         rst_n = 1'b1;
@@ -291,14 +297,16 @@ module tb_control;
             test_pulse_width,
             test_pulse_period,
             test_pulse_num,
-            test_pulse_height_raw
+            test_pulse_height_raw,
+            test_pulse_period_adc
         );
 
         wait_cfg_applied(
             test_pulse_width,
             test_pulse_period,
             test_pulse_num,
-            test_pulse_height_raw
+            test_pulse_height_raw,
+            test_pulse_period_adc
         );
 
         if (dac_pulse_width !== 32'h11223344) begin
@@ -313,8 +321,8 @@ module tb_control;
         if (dac_pulse_height !== 12'hCDE) begin
             $fatal(1, "dac_pulse_height mismatch: got %h expected %h", dac_pulse_height, 12'hCDE);
         end
-        if (adc_pulse_period !== 32'h55667788) begin
-            $fatal(1, "adc_pulse_period mismatch: got %h expected %h", adc_pulse_period, 32'h55667788);
+        if (adc_pulse_period !== 32'h50607080) begin
+            $fatal(1, "adc_pulse_period mismatch: got %h expected %h", adc_pulse_period, 32'h50607080);
         end
         if (adc_pulse_num !== 16'hA1B2) begin
             $fatal(1, "adc_pulse_num mismatch: got %h expected %h", adc_pulse_num, 16'hA1B2);