diff --git a/Src/main.c b/Src/main.c
index 8a705f4..8644d57 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -181,15 +181,28 @@ int main(void)
 	//TIM4 -> ARR = 60; // for 1.5 MHz
 	//TIM4 -> ARR = 91; // for 1 MHz
 	//TIM4 -> ARR = 45; // for 2 MHz
-	TIM4 -> ARR = 53; // for 1.735 MHz. It`s the highest frequency for correct ADC work. At higher freq artifacts (voltage peaks) appears.
+//	TIM4 -> ARR = 53; // for 1.735 MHz. It`s the highest frequency for correct ADC work. At higher freq artifacts (voltage peaks) appears.
+	//TIM4 -> ARR = 100; // for 1.735 MHz. It`s the highest frequency for correct ADC work. At higher freq artifacts (voltage peaks) appears.
+
+	TIM4 -> ARR = 37; //for 2.42 MHz. Highest freq for stm_ADC based on stm32G431-- 2.8 MHz
 
 	TIM4 -> CCR3 = (TIM4 -> ARR +1)/2 - 1;
 
 
-	//Mach-Zander clock (should be 1/4 of ADC clock freq)
+	//for E502_ADC
+
+	//Mach-Zander clock (should be half of ADC clock freq)
+	//TIM11 -> ARR = (TIM4 -> ARR +1)*2 - 1;
+	//TIM11 -> CCR1 = (TIM11 -> ARR +1)/2 - 1;
+
+
+	// for stm_ADC
+
+	//Mach-Zander clock equal to ADC clock (adc triggers on rising and falling edges)
+	TIM11 -> ARR = TIM4 -> ARR;
+	TIM11 -> CCR1 = (TIM11 -> ARR +1)/2 - 1; //duty 50%
+
 
-	TIM11 -> ARR = (TIM4 -> ARR +1)*4 - 1;
-	TIM11 -> CCR1 = (TIM11 -> ARR +1)/2 - 1;
 
 	/*
   if (HAL_GPIO_ReadPin(INP_0_GPIO_Port, INP_0_Pin) == 0){
@@ -399,6 +412,14 @@ int main(void)
 						//TIM11 -> CCR1 = (TIM11 -> ARR +1)/2 - 1;
 
 
+						//for stm_ADC
+						//TIM4 -- ADC clock. Rising edge -- for SYNC_DETector_ON
+						//TIM4 -- ADC clock. Falling edge -- for SYNC_DETector_OFF
+
+						//TIM4 freq is equal to TIM11
+						//TIM4 phase should be adjustable to get correct sampling moment
+
+
 
 						Set_LTEC(TT_CHANGE_CURR_2, task.curr);
 						(void) MPhD_T(TT_CHANGE_TEMP_1);
@@ -411,8 +432,9 @@ int main(void)
 						Set_LTEC(TT_CHANGE_TEMP_2, temp16);//Drive Laser TEC 2
 
 						// Toggle pin for oscilloscope
-						HAL_GPIO_WritePin(GPIOD, GPIO_PIN_7, GPIO_PIN_SET); //start of the whole frequency sweep procedure
-						HAL_GPIO_WritePin(GPIOD, GPIO_PIN_7, GPIO_PIN_RESET);
+						HAL_GPIO_WritePin(GPIOD, GPIO_PIN_7, GPIO_PIN_SET); //start of the whole frequency sweep procedure (start trigger pulse)
+						//for (uint32_t i = 100000; i; --i){;}
+
 		
 						st = HAL_TIM_Base_Start_IT(&htim10);
 						if (st != HAL_OK)
@@ -442,26 +464,43 @@ int main(void)
 						TIM4 -> CNT = TIM4 -> ARR - 20; // not zero to make phase shift that will be robust to big delay in RF subsystem (up to ~400 ns)
 						TIM11 -> CNT = 0;
 
+						uint32_t curr_step_N = 0;
+						uint32_t postAmpl_1_en_curr_step_N = ((task.max_param - task.current_param)/3.0 * 1.0) / task.delta_param;
+						uint32_t postAmpl_2_en_curr_step_N = ((task.max_param - task.current_param)/3.0 * 2.0) / task.delta_param;
+
 
 						while (task.current_param < task.max_param)
 						{
 							if (TIM10_coflag)
 							{
 								Set_LTEC(TT_CHANGE_CURR_1, task.current_param);
+								HAL_GPIO_TogglePin(GPIOG, GPIO_PIN_9); //toggle PG9. Change indicates that current step started.
+
 								//TIM11 -> CNT = 0; // to link modulator phase
 								//TIM4 -> CNT = 0; // to link ADC clock phase
 								task.current_param += task.delta_param;
 								TO10 = 0;
 								TIM10_coflag = 0;
 								
-								HAL_GPIO_WritePin(GPIOG, GPIO_PIN_9, GPIO_PIN_SET); // set the current step laser current trigger
-								HAL_GPIO_WritePin(GPIOG, GPIO_PIN_9, GPIO_PIN_RESET);
+								if (curr_step_N == postAmpl_1_en_curr_step_N){
+									HAL_GPIO_WritePin(OUT_6_GPIO_Port, OUT_6_Pin, GPIO_PIN_SET);
+								}
+								if (curr_step_N == postAmpl_2_en_curr_step_N){
+									HAL_GPIO_WritePin(OUT_7_GPIO_Port, OUT_7_Pin, GPIO_PIN_SET);;
+								}
+
+
+
+								//HAL_GPIO_WritePin(GPIOG, GPIO_PIN_9, GPIO_PIN_SET); // set the current step laser current trigger
+								//HAL_GPIO_WritePin(GPIOG, GPIO_PIN_9, GPIO_PIN_RESET);
 //*
 								if (step_counter % trigger_step == 0){ //trigger at every 60 step
 									OUT_trigger(trigger_counter);
 									++trigger_counter;
 								}
 								++step_counter;
+
+								HAL_GPIO_WritePin(GPIOD, GPIO_PIN_7, GPIO_PIN_RESET); //stop trigger pulse
 //*/
 /*
 								++task_sheduler;
@@ -497,6 +536,8 @@ int main(void)
 
 
 						Stop_TIM10();
+						HAL_GPIO_WritePin(OUT_6_GPIO_Port, OUT_6_Pin, GPIO_PIN_RESET);
+						HAL_GPIO_WritePin(OUT_7_GPIO_Port, OUT_7_Pin, GPIO_PIN_RESET);
 
 						task.current_param = task.min_param;
 						Set_LTEC(TT_CHANGE_CURR_1, task.current_param);