The Overflow bins count the number of spikes that were not within the time windows for each histogram. Type in a file in which to save your runs. Hit the Enter button to display the run. This will restore the run arrow. Drag mouse to form a box around what you want to print out Press Print in Print Dialog Box.
Hard copy is output from nearby printer after several minutes.
When a waveform causes a trigger to be sent to the event timer, it appears with a bright hat on top of the waveform on the Tektronix 2213A oscilloscope. When the triggering is set correctly, each spike should have the same waveform. False triggers, often from the triggering set too low in amplitude, are evident when some triggered waveforms look different than others. Also watch out in some recordings for a gross response, an evoked potential that is picked up by the electrode. Contamination with a gross response will make correct triggering difficult.