Vertical Signal Input
This input is connected to the oscilloscope probe. The voltage variations applied this entry appear in the form of picture on the screen.
Key Mode Selection Input (AC-DC)
This key is selected according to the type of waveform to be observed. In some oscilloscopes this switch has three positions (CA-0-DC or AC-GND-DC). This additional position is used for making adjustments oscilloscope trace in some situations. For example: if you want a reference on the screen.
Keyswitch Gain (V/Div)
This key allows you to "increase" or that "decrease" the amplitude projection on the oscilloscope screen (image height).
To move the image up or down on the screen. The move does not affect the shape of the figure projected on the screen.
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