HELP22

Question

Answer 1

(8.1)

The cathode-ray oscilloscope (CRO) is a common laboratory instrument that provides accurate time and amplitude measurements of signals over a wide range of frequencies.

Its reliability, stability and ease of operation make it suitable as a general purpose laboratory instrument.

The heart of the CRO is a cathode-ray tube.

Answer 2

(8.2)

A time base generator is a special type of function generator, an electronic circuit that generates a varying voltage  to produce a particular waveform .

Time base generators produce very high frequency sawtooth, waves specifically designed to deflect the beam in cathode ray tube (CRT) smoothly across the face of the tube and then return it to its starting position.

Answer 3

(8.3.1)

A digital signal is a physical signal that is a representation of a sequence of discrete values for example of an arbitrary bit stream , or of a digitizedanalog signal.

In digital electronic switching the discrete or digital signal wave forms are used.

Answer 4

(8.3.2)

In Transmission of radio signals electro magnetic waves are used.

Radio is the wireless transmission of electromagnetic energy through free space.

Use of radio waves is to carry information, such as sound, by systematically changing (modulation) some property of the radiated waves, such as their amplitude , frequency, phase, or pulse width.

Answer 5

(8.4)

Step 1:

The Oscilloscope displays a sine wave having vertical divisions and horizontal divisions.

The vertical amplifier scale is .

The horizontal scale is .

(8.4.1)

The Amplitude of a sine wave is number of units of voltage along the vertical line number of divisions

Amplitude is .

(8.4.2)

The horizontal scale is .

The time period of a sine wave is number of divisions horizontal scale.

The time period  is .

Solution:

(8.4.1) Amplitude is .

(8.4.2) The time period is .