|1. Power switch||To switch on and off of the oscilloscope|
|2. Focus control||To control the focus of the spot on the screen.|
|3. Intensity control||To control the brightness of the spot on the screen.|
|Y-offset moves the whole trace vertically up and down on the screen, while X-offset moves the whole trace from side to side on the screen.|
|6. Timebase control|
Whenever we switch on the time-base, we are actually applying a sawtooth voltage to the X-plates (Figure below).
* This makes the electron beam sweep across the screen at a constant speed.
|7. Y gain control||* the “Volts/Div.” wheels amplify an input signal so that for a division a given voltage level is invalid. A “division” is a segment, a square on the screen of the oscilloscope.|
* A setting of “.5” i.e. means, that the height of a single square equals a voltage of 0.5 V. An amplitude of 1 V would have a size of two divisions vertical to the abscissa.
|8. d.c./a.c. switch||d.c. – d.c. and a.c. voltage displayed.|
a.c. – only a.c. voltage displayed.
|9. X-input and Y-input||Electric input connects to the X-plate and Y-plate.|
The table below shows the sample display of direct current and alternating current when the time base is switched ON and OFF.
|Direct Current (Time Base Switched Off)||Direct Current (Time Base Switched On)|
|Alternating Current (Time Base Switched Off)||Alternating Current (Time Base Switched On)|