diff --git a/rfg_adc_plotter/gui/pyqtgraph_backend.py b/rfg_adc_plotter/gui/pyqtgraph_backend.py
index aee1638..de6350a 100644
--- a/rfg_adc_plotter/gui/pyqtgraph_backend.py
+++ b/rfg_adc_plotter/gui/pyqtgraph_backend.py
@@ -1012,6 +1012,7 @@ def run_pyqtgraph(args) -> None:
     p_line_phase.setLabel("left", "рад")
     try:
         p_line_phase.setXLink(p_line)
+        p_line_phase.enableAutoRange(axis="x", enable=False)
         p_line_phase.setVisible(False)
     except Exception:
         pass
@@ -3165,6 +3166,19 @@ def run_pyqtgraph(args) -> None:
                 elif curve_sec_phase is not None:
                     clear_curve_if_needed("sec_phase", curve_sec_phase)
 
+                # Force-sync X range from main plot to all secondary plots
+                if has_sec or runtime.current_secondary_magnitude is not None:
+                    try:
+                        _xr = p_line.viewRange()[0]
+                        if p_secondary_ch is not None:
+                            p_secondary_ch.setXRange(_xr[0], _xr[1], padding=0)
+                        if p_secondary_amp is not None:
+                            p_secondary_amp.setXRange(_xr[0], _xr[1], padding=0)
+                        if p_secondary_phase is not None:
+                            p_secondary_phase.setXRange(_xr[0], _xr[1], padding=0)
+                    except Exception:
+                        pass
+
                 if active_do1_tagged:
                     if displayed_tagged_aux_low is not None:
                         aux_low_1, aux_low_2 = displayed_tagged_aux_low