diff --git a/src/core/data_buffer.py b/src/core/data_buffer.py
index bd61960..e7fc6aa 100644
--- a/src/core/data_buffer.py
+++ b/src/core/data_buffer.py
@@ -43,19 +43,10 @@ class DataBuffer:
         self.buffer_alarms = [0] * self.line_size
         self.last_alarm_channels = []
 
-        self.prev_values = [None] * self.line_size
-        self.trend_streak = [0] * self.line_size
-
-        # Допускаем небольшой обратный ход, чтобы не сбрасываться от микрошума.
-        self.dbfs_max_backstep_db = float(os.getenv('dbfs_max_backstep_db', 0.25))
-        
-
         self.freq_tag = '' if freq_tag is None else str(freq_tag)
         suffix = f'_{self.freq_tag}' if self.freq_tag else ''
 
-        # Параметры MAD-порогов (per-frequency с fallback на общие).
         self.mad_k_on = float(os.getenv('mad_k_on' + suffix, os.getenv('mad_k_on', 5.0)))
-        self.mad_k_off = float(os.getenv('mad_k_off' + suffix, os.getenv('mad_k_off', 2.5)))
         self.mad_eps = float(os.getenv('mad_eps' + suffix, os.getenv('mad_eps', 0.05)))
         self.dbfs_linear_offset_db = float(
             os.getenv('dbfs_linear_offset_db' + suffix, os.getenv('dbfs_linear_offset_db', 0.0))
@@ -120,25 +111,24 @@ class DataBuffer:
         median_value = float(median_value)
         return self.dbfs_linear_offset_db + self.dbfs_linear_abs_median_scale * abs(median_value)
 
-    def get_threshold(self, channel_idx, k=None):
+    def get_threshold(self, channel_idx):
         """
         Получить динамический порог в dB для канала:
-        threshold = median + linear_term(median) + k * MAD.
+        threshold = median + linear_term(median) + mad_k_on * MAD.
         До завершения инициализации возвращает None.
         """
         if not self.check_init():
             return None
 
-        coef = self.mad_k_on if k is None else float(k)
         baseline = float(self.buffer_medians[channel_idx])
-        mad = max(float(self.buffer_mads[channel_idx]), self.mad_eps)
+        mad_eff = max(float(self.buffer_mads[channel_idx]), self.mad_eps)
         linear_term = self.get_linear_term(baseline)
-        return baseline + linear_term + coef * mad
+        return baseline + linear_term + self.mad_k_on * mad_eff
 
-    def get_thresholds(self, k=None):
+    def get_thresholds(self):
         if not self.check_init():
             return [None] * self.line_size
-        return [self.get_threshold(i, k) for i in range(self.line_size)]
+        return [self.get_threshold(i) for i in range(self.line_size)]
 
     def log_threshold_update(self, updated_column):
         if not self.check_init():
@@ -152,22 +142,19 @@ class DataBuffer:
             mad = float(self.buffer_mads[i])
             mad_eff = max(mad, self.mad_eps)
             linear_term = self.get_linear_term(baseline)
-            threshold_on = self.get_threshold(i, self.mad_k_on)
-            threshold_off = self.get_threshold(i, self.mad_k_off)
+            threshold = self.get_threshold(i)
             packet_times = [self._format_ts(ts) for ts in self.buffer_timestamps[i]]
             print(
                 f'  ch={i} median={baseline:.6f} '
                 f'linear_term={linear_term:.6f} '
                 f'mad={mad:.6f} mad_eff={mad_eff:.6f} '
-                f'mad_term_on={self.mad_k_on * mad_eff:.6f} mad_term_off={self.mad_k_off * mad_eff:.6f} '
-                f'threshold_on={threshold_on:.6f} threshold_off={threshold_off:.6f} '
+                f'mad_term={self.mad_k_on * mad_eff:.6f} '
+                f'threshold={threshold:.6f} '
                 f'packet_times={packet_times}'
             )
 
     def alarms_fill_zeros(self):
         self.buffer_alarms = [0] * self.line_size
-        self.trend_streak = [0] * self.line_size
-        self.prev_values = [None] * self.line_size
         self.last_alarm_channels = []
 
     def update(self, data, packet_timestamps=None):
@@ -215,55 +202,36 @@ class DataBuffer:
     def check_alarm(self, data):
         """
         Проверка триггера системы по dBFS во времени.
-        Триггер: превышение динамического MAD-порога
-        с подтверждением тренда и несколькими последовательными чтениями.
+        Один порог на канал, набор тревоги и сброс счетчиков как в main.
         """
         if self.check_init():
             self.last_alarm_channels = []
             for i in range(len(data)):
                 current = data[i]
-                threshold_on = self.get_threshold(i, self.mad_k_on)
-                threshold_off = self.get_threshold(i, self.mad_k_off)
-
-                prev = self.prev_values[i]
-                delta_db = 0.0 if prev is None else current - prev
-                monotonic_or_stable = (prev is None) or (delta_db >= -self.dbfs_max_backstep_db)
-
-                if monotonic_or_stable:
-                    self.trend_streak[i] += 1
-                else:
-                    self.trend_streak[i] = 0
-
-                # Hysteresis: после начала серии используем более мягкий порог отпускания.
-                active_threshold = threshold_off if self.buffer_alarms[i] > 0 else threshold_on
-                exceeding = (
-                    current >= active_threshold
-                )
+                threshold = self.get_threshold(i)
+                exceeding = current >= threshold
 
                 if exceeding:
                     self.buffer_alarms[i] += 1
                 else:
                     self.buffer_alarms[i] = 0
 
-                self.prev_values[i] = current
-
                 if self.buffer_alarms[i] >= self.num_for_alarm:
                     self.last_alarm_channels = [i]
                     self.buffer_alarms = [0] * self.line_size
-                    self.trend_streak = [0] * self.line_size
                     return True
 
         return False
 
     def check_single_alarm(self, median, cur_channel):
         """
-        Проверка, является ли текущая метрика по каналу превышающей MAD-порог.
+        Проверка, является ли текущая метрика по каналу превышающей порог.
         :param median: текущая метрика в dBFS.
         :param cur_channel: индекс канала внутри частоты.
         :return: Да/нет.
         """
         if self.check_init():
-            threshold_on = self.get_threshold(cur_channel, self.mad_k_on)
-            return median >= threshold_on
+            threshold = self.get_threshold(cur_channel)
+            return median >= threshold
 
         return False