diff --git a/rfg_adc_plotter/gui/pyqtgraph_backend.py b/rfg_adc_plotter/gui/pyqtgraph_backend.py
index ddbc4d1..f6b4336 100644
--- a/rfg_adc_plotter/gui/pyqtgraph_backend.py
+++ b/rfg_adc_plotter/gui/pyqtgraph_backend.py
@@ -950,7 +950,7 @@ def run_pyqtgraph(args) -> None:
         p_line_aux_vb = pg.ViewBox()
         try:
             p_line.showAxis("right")
-            p_line.getAxis("right").setLabel("CH1/CH2, В")
+            p_line.getAxis("right").setLabel("√(CH1²+CH2²), В")
             p_line.scene().addItem(p_line_aux_vb)
             p_line.getAxis("right").linkToView(p_line_aux_vb)
             p_line_aux_vb.setXLink(p_line)
@@ -989,7 +989,7 @@ def run_pyqtgraph(args) -> None:
     p_line.setLabel("left", "Y")
     if bin_iq_power_mode:
         try:
-            p_line.setLabel("left", "CH1^2 + CH2^2, В^2")
+            p_line.setLabel("left", "CH1²+CH2², В²")
         except Exception:
             pass
     ch_text = pg.TextItem("", anchor=(1, 1))
@@ -1239,7 +1239,7 @@ def run_pyqtgraph(args) -> None:
     parsed_data_cb = QtWidgets.QCheckBox("данные после парсинга")
     if complex_sweep_mode:
         try:
-            parsed_data_cb.setText("Сырые CH1/CH2 (В)" if bin_iq_power_mode else "Сырые Re/Im")
+            parsed_data_cb.setText("√(CH1²+CH2²) (В)" if bin_iq_power_mode else "Сырые Re/Im")
             parsed_data_cb.setChecked(False)
         except Exception:
             pass
@@ -1721,15 +1721,15 @@ def run_pyqtgraph(args) -> None:
                 p_fft.setTitle("FFT: exp(V)")
                 parsed_data_cb.setText("Сырые log-detector (В)")
             elif is_do1_tagged:
-                p_line.setTitle("DO1 tagged raw: LOW/HIGH CH1^2 + CH2^2 (В^2)")
-                p_line.setLabel("left", "CH1^2 + CH2^2, В^2")
+                p_line.setTitle("DO1 tagged raw: LOW/HIGH CH1²+CH2² (В²)")
+                p_line.setLabel("left", "CH1²+CH2², В²")
                 p_fft.setTitle("FFT")
-                parsed_data_cb.setText("DO1 tagged CH1/CH2 (В)")
+                parsed_data_cb.setText("DO1 tagged √(CH1²+CH2²) (В)")
             elif is_bin_iq:
-                p_line.setTitle("Сырые CH1/CH2 (В) и CH1^2 + CH2^2 (В^2)")
-                p_line.setLabel("left", "CH1^2 + CH2^2, В^2")
+                p_line.setTitle("√(CH1²+CH2²) (В) и CH1²+CH2² (В²)")
+                p_line.setLabel("left", "CH1²+CH2², В²")
                 p_fft.setTitle("FFT: CH1 + i*CH2")
-                parsed_data_cb.setText("Сырые CH1/CH2 (В)")
+                parsed_data_cb.setText("√(CH1²+CH2²) (В)")
             elif complex_sweep_mode:
                 p_line.setTitle("Сырые данные до FFT")
                 p_line.setLabel("left", "Y")
@@ -2885,18 +2885,24 @@ def run_pyqtgraph(args) -> None:
             if isinstance(secondary_payload, dict):
                 sec_ch1 = secondary_payload.get("ch1")
                 sec_ch2 = secondary_payload.get("ch2")
-                if sec_ch1 is not None:
+                if sec_ch1 is not None and sec_ch2 is not None:
+                    sec_ch1_calibrated = np.asarray(
+                        calibrate_freqs({"F": base_freqs, "I": sec_ch1})["I"],
+                        dtype=np.float32,
+                    )
+                    sec_ch2_calibrated = np.asarray(
+                        calibrate_freqs({"F": base_freqs, "I": sec_ch2})["I"],
+                        dtype=np.float32,
+                    )
+                    v_ch1 = convert_tty_i16_to_voltage(sec_ch1_calibrated, tty_range_v)
+                    v_ch2 = convert_tty_i16_to_voltage(sec_ch2_calibrated, tty_range_v)
+                    runtime.full_secondary_ch1 = np.sqrt(v_ch1 ** 2 + v_ch2 ** 2)
+                elif sec_ch1 is not None:
                     sec_ch1_calibrated = np.asarray(
                         calibrate_freqs({"F": base_freqs, "I": sec_ch1})["I"],
                         dtype=np.float32,
                     )
                     runtime.full_secondary_ch1 = convert_tty_i16_to_voltage(sec_ch1_calibrated, tty_range_v)
-                if sec_ch2 is not None:
-                    sec_ch2_calibrated = np.asarray(
-                        calibrate_freqs({"F": base_freqs, "I": sec_ch2})["I"],
-                        dtype=np.float32,
-                    )
-                    runtime.full_secondary_ch2 = convert_tty_i16_to_voltage(sec_ch2_calibrated, tty_range_v)
             refresh_current_window(push_to_ring=True)
             processed_frames += 1
             last_packet_processed_at = time.time()