Test: Communication Systems - 7 - Electronics and Communication Engineering (ECE) MCQ
25 Questions MCQ Test - Test: Communication Systems - 7
Consider the following test signal patterns
- Ramp
- Grill
- Grey shades
- Sine pulse
- Picture line up generating equipment
Which of the above are used in TV studios?
If aspect ratio is 
and number of lines in each frame is 625, the number of picture elements in one frame is
and number of lines in each frame is 625, the number of picture elements in one frame is
.| 1 Crore+ students have signed up on EduRev. Have you? Download the App |
Indicate the false statement: If SWR on a transmission line is infinite, the line is terminated in
The resonant frequency of an RF amplifier is 1 MHz and its bandwidth is 10 kHz. The Q factor will be
.The total number of pulses in a TV remote control is
Assertion (A): A Smith chart can be used for a number of calculations of a transmission line
Reason (R): Smith chart is basically a polar impedance diagram.
Which camera tube has highest sensitivity and very wide spectral response?
A computer monitor uses 180 W in normal operation and 20 W in sleep mode. The computer is on all the 24 hours but is in sleep mode for 18 hours a days. The energy units saved in 30 days are
.Consider the following functions
- It detects the AM video carrier IF so as to produce the video signal
- It produces and separates out the inter carrier sound IF of 5.5 MHz
- It amplifies the video signal
- It amplifies the audio signal
The video detector in a colour TV performs which of the above functions
Which of the following antennas is circularly polarized?
In colour TV system the colour sub carrier frequency is 4.43 MHz.
The percentage saving in power of 100% modulated suppressed carrier AM signal is
if carrier is suppressed then
.A transmitter power of 5 W is increased by 20 dB. The effective radiated power is
or P = 500 W.The maximum distance between television transmission and receiving antennas for reasonably good reception should be
Assertion (A): EM waves are attenuated as they travel outward from a source
Reason (R): Both field intensity and power density follow inverse square law.
Graphic equaliser system in stereophonic systems generally have
An amplifier operating over a frequency range of 18 to 20 MHz has 10 kΩ input resistance. At a temperature of 27º C, the noise voltage at input of amplifier is (Boltzman constant k = 1.38 x 10-23 J/K)
Some sources of TV programs are
- TV camera
- Telecine
- VTR
- External signal
Which of the above are actually present in a TV studio?
Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is given to an ideal frequency detector. The output of the detector is
In Vidicon camera tube, the resistance of photoconductive material on the target plate
In a satellite transponder the power amplifier feeds power P to the transmitting antenna of gain G. If distance of earth is d, the power flux density is
The percentage saving in power of 100% modulated suppressed carrier AM signal is
Which of the following are useful in comparing the noise performance of receivers?
- Input noise voltage
- Noise figure
- Noise resistance
- Noise temperature
Select answer as per the following codes:
Top Courses for Electronics and Communication Engineering (ECE)
Important Questions for Communication Systems - 7
Communication Systems - 7 MCQs with Answers
Online Tests for Communication Systems - 7
|
© EduRev
|
Education Revolution
|
Follow Us
|
