Types of Oscilloscope MCQ || Types of cathode Ray Oscilloscope Questions and Answers

Answer.1. Emit electrons

Explanation: 

A cathode-ray tube is a device that uses a beam of electrons in order to produce an image on a screen. The Role of CRT is to Emit Electron. The heart of the major component of the oscilloscope is the cathode ray tube (CRT). The rest of the CRO consists of circuitry to operate the CRT.

Answer.3. Provide signal delay

Explanation: 

A delay line is placed between the output of the vertical amplifier and the y input of the cathode ray tube, to delay the incoming unknown signals.

The purpose of the delay line is to synchronize unknown signals with sweep signals such that the complete signal portion will be displayed without any loss.

Answer.3. Initial part of signal to be observed is not lost

Explanation: 

A delay line is placed between the output of the vertical amplifier and the y input of the cathode ray tube, to delay the incoming unknown signals.

The purpose of the delay line is to synchronize unknown signals with sweep signals such that the complete signal portion will be displayed without any loss.

Answer.2. BJT

Explanation: 

• The vertical amplifier consists of several stages, with fixed overall sensitivity or gain expressed in V/div.
• The advantage of fixed gain is that the amplifier can be more easily designed to meet the requirements of stability and Bandwidth.
• The vertical amplifier is kept within its signal handling capability by proper selection of the input attenuator switch.
• The first element of the pre-amplifier is the input stage, often consisting of a FET source follower whose high input impedance isolates the amplifier from the attenuator.
• This FET input stage is followed by a BJT emitter follower, to match the medium impedance of FET output with the low impedance input of the phase inverter.

Answer.2. Amplifier

Explanation: 

Input signals in Cathode ray tube are amplified using Amplifier.

Basically two types of amplifier is used in Cathod ray tube.

1. Vertical Amplifier
2. Horizontal Amplifier

Horizontal Amplifier − It amplifies the sawtooth signal and then connects it to the horizontal deflection plates of CRT.

Vertical Amplifier − It amplifies the input signal, which is to be displayed on the screen of CRT.

Answer.2. Amplifier

Explanation: 

Input signals in Cathode ray tube are amplified using Amplifier.

Basically two types of amplifier is used in Cathod ray tube.

1. Vertical Amplifier
2. Horizontal Amplifier

Vertical Amplifier − It amplifies the input signal, which is to be displayed on the screen of CRT.

Horizontal Amplifier − It amplifies the sawtooth signal and then connects it to the horizontal deflection plates of CRT.

The saw-tooth voltage is fed to the horizontal amplifier which includes a phase inverter and produces two simultaneous output waveforms: a positive-going saw-tooth (run-up) and a negative-going saw-tooth (run-down).

The positive-going saw-tooth is applied to the right-hand horizontal deflection plate of the CRT, and the negative-going saw-tooth ” to the left-hand horizontal deflection plate.

The horizontal amplifier basically serves two purposes:

1. When the oscilloscope is being used in the ordinary mode of operation to display a signal applied to the vertical input, the horizontal amplifier will amplify the sweep generator output.

2. When the oscilloscope is being used in the X-Y mode, the signal applied to the horizontal input terminal will be amplified by the horizontal amplifier.

Answer.3. It is needed to operate a push-pull

Explanation: 

This phase inverter in CRO provides two antiphase output signals which are required to operate the push-pull output amplifier.

The push-pull output stage delivers equal signal voltages of opposite polarity to the vertical plates of the CRT.

The advantages of push-pull operation in CRO are similar to those obtained from push-pull operation in other applications; better hum voltage cancellation from the source or power supply (i.e. d, even harmonic suppression, especially the large 2nd harmonic is canceled out, and greater power output per tube as a result of even harmonic cancellation.

In addition, the number of defocusing and non-linear effects are reduced, because neither plate is at ground potential.

Answer.3. Wideband

Explanation: 

The Amplifier stage in Cathode Ray Tube is Wide Band.

In the case of a wide-band oscilloscope tube that it should have as great a deflection sensitivity as possible (if necessary, at the expense of other qualities).  The vertical amplifier is the principal factor in determining the sensitivity and bandwidth of an oscilloscope.

The vertical amplifier is a wide band amplifier used to amplify signals in the vertical section. Delay time is used to delay the signal for some time in the vertical sections.

Answer.2. Attenuator

Explanation: 

Input signals in the Cathode ray tube are amplified using Amplifier. The amplifier stage of a Cathode Ray Tube essentially consists of an attenuator stage.

Basically, two types of amplifiers are used in the Cathode ray tube.

1. Vertical Amplifier
2. Horizontal Amplifier

The first element of the pre-amplifier is the input stage, often consisting of a FET source follower whose high input impedance isolates the amplifier from the attenuator. This FET input stage is followed by a BJT emitter follower, to match the medium impedance of FET output with the low impedance input of the phase inverter.

Answer.3. Wideband

Explanation: 

The Amplifier stage in Cathode Ray Tube is Wide Band.

In the case of a wide-band oscilloscope tube that it should have as great a deflection sensitivity as possible (if necessary, at the expense of other qualities).  The vertical amplifier is the principal factor in determining the sensitivity and bandwidth of an oscilloscope.

The vertical amplifier is a wide band amplifier used to amplify signals in the vertical section. Delay time is used to delay the signal for some time in the vertical sections.