Pause automatic waveform transfers on hardware Stop

python/set_devices/tektronix_session.py

@@ -42,9 +42,13 @@ class ScopeSession:
                 if action == "shutdown":
                     break
                 try:
-                    if action == "capture" and len(args) == 4:
-                        value = client.capture(*args[:3])
-                        value = CaptureFrame(value, prepare_preview(value, args[3]))
+                    if action == "capture" and len(args) in (4, 5):
+                        automatic = len(args) == 5 and args[4]
+                        if automatic and not client.is_running():
+                            value = None
+                        else:
+                            value = client.capture(*args[:3])
+                            value = CaptureFrame(value, prepare_preview(value, args[3]))
                     elif action == "export":
                         filename, waves = args
                         with open(filename, "w", newline="", encoding="utf-8-sig") as stream: