Introduction to Front Panel Control of CRO
1. ON - OFF: The ON-OFF switch control employed to manage the CRO in ON-OFF position.
2. INTENSITY: intensity knob manages the intensity or brightness of the light generated by beam spot. It in fact controls the number of electrons per second that are bombarding the screen. The potentiometer that is connected to the control grid voltage differ the intensity.
3. FOCUS: This manages the sharp of the spot. This is acquired through varying the voltage applied to the focussing anodes.
4. SCREEN: It is some type of plastic screen in front of the cathode ray tube. This screen has engraved such as graph paper. This is termed as graticule this scale facilitates the measurements of the oscilloscope.
5. V. POSITION: With the assist of this control the pattern acquired on the screen can be shifted a whole to vertically downward and upward. This is attained through adding DC voltages to input signals.
6. H. POSITION: This is employed to shift the display like a whole to left or right.
7. VET - SET - ATTENUATOR: This creates the gain of the vertical amplifier 10 times larger than normal.
8. GROUND: The input of the amplifier is grounded. There will be no vertical deflection. It is employed for measuring voltage with respect to ground.
9. SYNC LEVEL: To acquire the standard pattern on the screen. There are several signals that can be applied to the trigger circuit. The signals can be chosen by using a sync selector switch. 1. Internal 2. Line 3. External.
10. SWEEP SELECTOR: The horizontal amplifier receives an input from saw tooth sweep generator that is triggered by sync. Amplifier.
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