diff --git a/lppinstru/discovery.py b/lppinstru/discovery.py
--- a/lppinstru/discovery.py
+++ b/lppinstru/discovery.py
@@ -320,10 +320,11 @@ class Discovery(object):
         if syncOnTrigger:
             self.analog_out_set_trigger(channel)
             self.__libdwf.FDwfAnalogOutRepeatSet(self.__hdwf, c_int(channel),c_int(0))
-            if frequency >= triggerFrq:
-                runDuration = triggerFrq
-            else:
-                runDuration = triggerFrq/frequency
+#            if frequency >= triggerFrq:
+            runDuration = triggerFrq
+# Doesn't work! try with triggerFrq=1 and frequency=0.8
+#            else:
+#                runDuration = triggerFrq/frequency
             self.__libdwf.FDwfAnalogOutRunSet(self.__hdwf, c_int(channel),c_double(runDuration))
         self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(True))