improved logging

python_app/hardware_full/sn9000_service.py

@@ -79,6 +79,7 @@ class Sn9000Service:
         if self._instrument is not None:
             return
 
+        logger.info("Opening SN9000 VISA session: %s", self.resource)
         try:
             self._resource_manager = pyvisa.ResourceManager(self.visa_library)
             self._instrument = self._resource_manager.open_resource(self.resource)
@@ -91,12 +92,14 @@ class Sn9000Service:
             if self._settings is not None:
                 self._apply_configuration(self._settings)
         except Exception:
+            logger.exception("Failed to open SN9000 VISA session: %s", self.resource)
             self.close()
             raise
 
     def close(self) -> None:
         """Close VISA sessions."""
         if self._instrument is not None:
+            logger.debug("Closing SN9000 VISA session")
             self._instrument.close()
             self._instrument = None
         if self._resource_manager is not None:
@@ -114,6 +117,7 @@ class Sn9000Service:
 
     def recover(self) -> None:
         """Reopen the VISA session after a transient acquisition failure."""
+        logger.warning("Recovering SN9000 VISA session (close, wait, reopen)")
         self.close()
         time.sleep(0.25)
         self.open()
@@ -133,6 +137,10 @@ class Sn9000Service:
         self._validate_sweep(sweep)
         self._settings = sweep
         self._frequency_hz = None
+        logger.debug(
+            "Configuring SN9000 sweep: %s-%s Hz, %s points, IFBW=%s Hz, %s dBm",
+            sweep.start_hz, sweep.stop_hz, sweep.points, sweep.if_bandwidth_hz, sweep.power_dbm,
+        )
         if self._instrument is None:
             return
         self._apply_configuration(sweep)
@@ -210,6 +218,10 @@ class Sn9000Service:
         instrument.write("TRIG:SOUR BUS")
         self._expect_opc("*OPC?", context="SN9000 setup")
         self._frequency_hz = self._query_float32_array("SENS:FREQ:DATA?", int(sweep.points))
+        logger.info(
+            "SN9000 configured: %d traces, %d points (%s-%s Hz)",
+            len(_S_PARAMETER_QUERY_ORDER), int(sweep.points), sweep.start_hz, sweep.stop_hz,
+        )
 
     def _query_sweep_s_parameters(self, points: int) -> dict[str, np.ndarray]:
         instrument = self._require_instrument()