Calibrate thresholds
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Calibrating threshold to background noise level: in general, you should set the detection of a sound event (triggering) to a level only slightly higher then that of the background noise level. Remove the animal from the training box, start the SA+ Recorder. Make sure that the oscilloscopic view turned on. Click the Recording tab, Chan options and check the monitor only checkbox (both Active and Monitor only should be checked). Click ok, and then change the peaks value (top of the Recording window) to 1, and the occurred within value to 0. Now go to the main window and click Record. Locate the Thresh slider just below the oscilloscopic view and turn it all the way to the left -- a green light should turn on above the oscilloscopic view. Now move the slider slowly to the right until the green light turns off, and remains off (make sure that no sound enters the training box). Repeat for all boxes. This is the correct threshold level (you can go a bit above it, but not too much). Set the mode of each channel back to Recording, and turn back the recording setting to normal (do not leave the occurred within level at zero!). Place the animal in the box, and as long as the animal stays quiet, you should see that SA+ records nothing. Any sound produced by the animal (including cage noise) will trigger a recording session, indicated by the green light. Note that if you decide to change gain, you must recalibrate the threshold level, so it is recommended to first set the gain to convenient levels and keep it unchanged thereafter.
  

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