added dummy method for switching to fast acquisition and back

1 files changed, 30 insertions, 0 deletions

diff --git a/qolab/hardware/scope/_basic.py b/qolab/hardware/scope/_basic.py
index 751026d..261e947 100644
--- a/qolab/hardware/scope/_basic.py
+++ b/qolab/hardware/scope/_basic.py
@@ -157,6 +157,34 @@ class Scope(BasicInstrument):
             self.setRun(old_run_status)  # start running if it was old run state
         return allTraces
 
+    def restorePriorToFastGrab(self, chNum, old_config):
+        """Restore relevant channel/scope settings prior to fast grab tune up."""
+        logger.info("method restorePriorToFastGrab is not implemented")
+
+    def switchToFastGrab(self, chNum):
+        """Switch scope to the fastest mode for trace delivery.
+
+        Intended to be used in chanAutoScale methods where speed
+        transfer is more important than fidelity. It is good
+        idea to implement function ``restorePriorToFastGrab(chan, old_config)``
+        to be used in conjunction with ``switchToFastGrab``.
+
+        To be fast, it should aim to decrease data transfer time,
+        i.e. reduce number of transferred point.
+        It also need to be interface dependent. GPIB and USB are known
+        to be quite slow when compared to network connection.
+
+        So try to be smart in hardware dependent classes.
+
+        Return
+        ------
+        old_config : dictionary
+            old config with settings necessary to restore initial state
+        """
+
+        logger.info("machinery for switchToFastGrab is not implemented")
+        return self.getConfig()
+
     def chanAutoScale(self, chNum, margin=0.125, timeout=5):
         """Auto scale channel to fit signal on screen.
 
@@ -174,6 +202,7 @@ class Scope(BasicInstrument):
            at top and bottom for 8 division scope.
         """
 
+        old_config = self.switchToFastGrab(chNum)
         starttime = time.time()
         deadline = starttime + timeout
         timespan = self.getTimePerDiv() * self.horizDivOnScreen
@@ -222,6 +251,7 @@ class Scope(BasicInstrument):
                 # we converge, there is no point to improve
                 break
             scaled_corectly = False
+        self.restorePriorToFastGrab(chNum, old_config)
         if time.time() > deadline:
             logger.warning(
                 f"Scope did not make proper channel {chNum} scaling within {timeout=} sec."