diff --git a/src/drivers/echo_adc/echo_adc.c b/src/drivers/echo_adc/echo_adc.c
index 2eda53c..98a97d0 100644
--- a/src/drivers/echo_adc/echo_adc.c
+++ b/src/drivers/echo_adc/echo_adc.c
@@ -30,7 +30,6 @@ static bool echo_adc_initialized;
 /* ADC 원본 수신 버퍼 */
 static uint8_t raw_capture[ECHO_ADC_MAX_SAMPLES * 2];
 
-/* GPIO 포트 레지스터 선택 */
 static NRF_GPIO_Type *gpio_reg_for_spec(const struct gpio_dt_spec *spec)
 {
 	return (spec->port == DEVICE_DT_GET(DT_NODELABEL(gpio1))) ? NRF_P1 : NRF_P0;
@@ -112,27 +111,17 @@ static int echo_adc_capture_fast(uint16_t *samples, uint16_t num_samples)
 
 	for (uint16_t i = 0; i < num_samples; i++)
 	{
-		/* CS 하강 후 2바이트 수신 */
 		cs_port->OUTCLR = cs_mask;
 		spim->RXD.PTR = (uint32_t)&raw_capture[i * 2U];
 		spim->EVENTS_END = 0;
 		spim->TASKS_START = 1;
 
 		/* 전송 완료 대기 */
-		uint32_t timeout = 10000U;
-		while (!spim->EVENTS_END && (timeout > 0U))
+		while (!spim->EVENTS_END)
 		{
-			timeout--;
 		}
 
-		/* CS 복귀 */
 		cs_port->OUTSET = cs_mask;
-
-		if (timeout == 0U)
-		{
-			DBG_PRINTF("[ECHO] fast capture timeout\r\n");
-			return -ETIMEDOUT;
-		}
 	}
 
 	echo_adc_unpack_samples(samples, num_samples);
@@ -182,7 +171,7 @@ int echo_adc_init(void)
 	}
 
 	echo_adc_initialized = true;
-	DBG_PRINTF("[ECHO] SPIM3 init OK\r\n");
+	//DBG_PRINTF("[ECHO] SPIM3 init OK\r\n");
 	return 0;
 }