6-17
Figure 6-19.—Components that determine amplitude.
For purposes of this introductory discussion, we will present only CH (channel) 1. You should
realize that the information presented also applies to CH 2.
Vertical POSITION Control
The vertical POSITION control allows you to move the beam position up or down, as discussed
earlier.
Input Connector
The vertical input (or signal input) jack connects the signal to be examined to the vertical-deflection
amplifier. Some oscilloscopes may have two input jacks, one labeled AC and the other labeled DC. Other
models may have a single input jack with an associated switch, such as the AC GRD DC switch in figure
6-19. This switch is used to select the ac or dc connection. In the DC position, the signal is connected
directly to the vertical-deflection amplifier; in the AC position, the signal is first fed through a capacitor.
Figure 6-20 shows the schematic of one arrangement.
