Editing PMT and Electronics Setup (section)

==Setting Threshold==
'''1. Determining Threshold '''
To determine the appropriate threshold, the user should adjust the oscilloscope's trigger 
level so that it is just a few millivolts above the dark current. 
The threshold should be set high enough to avoid constant triggering from the dark current, 
but low enough to capture actual events.

'''2. Setting Threshold '''
In order to set the threshold a voltmeter and a screwdriver must be used. 
The positive probe of the voltmeter must be placed in the hole to the left of the T. 
Ground the other probe on the screw . 
Lastly insert the screwdriver into the hole to the right of T(orange). 
Turn the screw until the voltmeter reaches approximately 30mV.