A noise where foreign signal enters the path of the transmitted signal is called ……
A. Impulse
B. Inter modulation
C. cross talk
D. both b and c

1 Answer

Answer :

C. cross talk

Related questions

Description : Noise consisting of irregular pulses of short duration and relatively high amplitude, A. Quantizing noise B. Tone interference C. Impulse noise D. Cross talk

Last Answer : C. Impulse noise

Description : Noise consisting of irregular pulses of short duration and relatively high amplitude, A. Quantizing noise B. Tone interference C. Impulse noise D. Cross talk

Last Answer : A. Quantizing noise

Description : In radio regulation, the first symbol in the designation of radio emission is ______. A. Bandwidth B. Nature of signal(s) modulation the main carrier C. Type of modulation of the main carrier D. Type of information to be transmitted

Last Answer : C. Type of modulation of the main carrier

Description : Noise occurring in the presence of signal resulting from a mismatch between the exact value of an analog signal and the closet available quantizing step in a digital coder. A. Quantizing noise B. Thermal noise C. Impulse noise D. Crosstalk

Last Answer : A. Quantizing noise

Description : In a fiber-optic cable, the signal is propagatedalong theinner core by _______. A) reflection B) refraction C) modulation D) none of the above

Last Answer : reflection

Description : An ______signal is the optical modulation of an STS-n (or STM-n) signal. A) OC-n B) TDM-n C) FDM-n D) none of the above

Last Answer : TDM-n

Description : Bits can be sent over guided and unguided media as analog signal by ___________ a. digital modulation b. amplitude modulation c. frequency modulation d. phase modulation

Last Answer : a. digital modulation

Description : What is meant by the term modulation index? A. The processor index. B. The ratio between the deviation of a frequency modulated signal and the modulating frequency. C. The FM signal-to-noise ratio. D. The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency.

Last Answer : B. The ratio between the deviation of a frequency modulated signal and the modulating frequency.

Description : Unwanted signal that distorts a transmitted signal is called A. analogue B. noise C. digital D. tuning

Last Answer : noise

Description : In an optical fibre the signal is transmitted – (1) in a straight line path (2) In a curved path (3) due to total internal reflection (4) Due to refraction

Last Answer : (3) due to total internal reflection Explanation: Total internal reflection is the basic concept be-hind the optical fiber. Optical fiber employs the transmission of light down fibers of plastic ... refractive index to allow more light to be guided along the fiber through total internal refraction.

Description : What is the method of diversity reception where the signal is transmitted on 2 different frequencies over the same path? A. Quadruple B. Frequency C. Polarization D. Space

Last Answer : B. Frequency

Description : In an optical fibre the signal is transmitted (1) in a straight line path (2) In a curved path (3) due to total internal reflection (4) Due to refraction

Last Answer :  due to total internal reflection

Description : _________can impair a signal. A) Attenuation B) Distortion C) Noise D) All of theabove

Last Answer : All of theabove

Description : ________ is a typeof transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal. A) Attenuation B) Distortion C) Noise D) Decibel

Last Answer : Distortion

Description : ________ is a typeof transmission impairment in which the signal loses strength due to theresistance of the transmission medium. A) Attenuation B) Distortion C) Noise D) Decibel

Last Answer : Attenuation

Description : Which of the following refers to theterms "residual error rate"? A. the number of biterrors per twenty four hours of continuous operation onanasynchronous line B. The probability that one or moreerrors ... tonoise ratio dividedby the ratio of energy perbit to noise per hertz E. None of the above

Last Answer : The probability that one or moreerrors will be undetected whenan error detection scheme is used

Description : Attenuation and noise can impair a signal. True False

Last Answer : True

Description : The ______ layer is responsible for the movementof a signal across a physical section. A) section B) line C) path D) photonic

Last Answer : section

Description : The ____layer is responsible for the movement ofa signal across aphysical line. A) section B) line C) path D) photonic

Last Answer : section

Description : The ______ layer is responsible for the movementof a signal from its optical source to its optical destination. A) section B) line C) path D) photonic

Last Answer : line

Description : An advantage of optic fiber rejecting an induced noise signals from magnetic field or solar storms flux. A. Electric hazard B. Cross talk C. Immunity to noise D. Shielding

Last Answer : C. Immunity to noise

Description : Which distortion is least objectionable in case of audio amplifers? A) Phase distortion B) Frequency distortion C) Harmonic distortion D) Inter modulation distortion.

Last Answer : A) Phase distortion

Description : Which one of the following statements is correct with respect to AIDS? (a) The HIV can be transmitted through eating food together with an infected person. (b) Drug addicts are least ... and nutrition. (d) The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers.

Last Answer : (d) The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers.

Description : A light wave enters a sheet of glass at a perfect right angle to the surface. Is the majority of the wave reflected, refracted, transmitted, or absorbed?

Last Answer : Transmitted.

Last Answer : A Scheme in which several channels are inter-leaved and then transmitted together is known as Frequency division multiplex.

Description : The third symbol in the designation of radio emission under the ITU rules refers to A. Type of the modulation of the main carrier B. Bandwidth C. Nature of the signals modulating the main carrier D. Type of information to be transmitted

Last Answer : D. Type of information to be transmitted

Description : The first symbol in the designation of radio emission under the ITU rules to A. Nature of signals modulating the main carrier B. Type of information to be transmitted C. Bandwidth D. Type of modulation of the main carrier

Last Answer : D. Type of modulation of the main carrier

Description : The ratio of the level of the modulated output of a transmitter under conditions of standard test modulation to the level of the demodulated output with no modulation applied both measured with the ... . Reference audio output B. None of these C. Audio frequency response D. Residual noise level

Last Answer : D. Residual noise level

Description : An endpoint of an inter-process communication flow across a computer network is called a. socket b. pipe c. port d. machine

Last Answer : a. socket

Description : An endpoint of an inter-process communication flow across a computer network is called a. socket b. pipe c. port d. machine

Last Answer : a. socket

Description : Crosstalk due to incomplete suppression of sidebands or to intermodulation of two or more frequency-multiplexed channels which is unintelligible is classified as A. Impulse noise B. Thermal noise C. Quantizing noise D. Miscellaneous noise

Last Answer : D. Miscellaneous noise

Description : Sources of impulse noise induced in communication channels. A. Erroneous digital coding bit caused by an error on a transmission facility B. Transients due to relay operation C. Crosstalk from dc signaling systems D. All of these

Last Answer : D. All of these

Description : Which of the following types of noise becomes of great importance at frequencies? A. Shot noise B. Random noise C. Impulse noise D. Transit-time noise

Last Answer : D. Transit-time noise

Description : Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.

Last Answer : B. Impulse noise voltage is dependent on bandwidth

Description : Indicate the false statement. A. Industrial noise is usually of the impulse type B. Static is caused by lightning discharges in thunderstorms and other natural electric disturbances occurring in the ... another source of man-made noise D. Flourescent lights are another source of man-made noise

Last Answer : C. Distant stars are another source of man-made noise

Description : Form of interference caused by rain or dust storms. A. Precipitation static B. Shot-noise C. Galactic noise D. Impulse noise

Last Answer : A. Precipitation static

Description : _________ is measured on a circuit when it is correctly terminated but does not have any traffic. A. White noise B. Galactic noise C. Impulse noise D. Atmospheric noise

Last Answer : A. White noise

Description : What do you call the random noise seen on radar display screen? A. Impulse noise B. Atmospheric noise C. Grass D. Johnson noise

Last Answer : C. Grass

Description : What noise is a transient short-duration disturbance distributed essentially uniformly over the useful passband of a transmission system? A. Flicker noise B. Transit-time noise C. Shot noise D. Impulse noise

Last Answer : D. Impulse noise

Description : What is the reason why companding is employed in PCM systems? A. To overcome impulse noise in PCM receivers B. To allow amplitude limiting in the receivers C. To solve quantizing noise problem D. To protect small signals in PCM from quantizing distortion

Last Answer : D. To protect small signals in PCM from quantizing distortion

Description : ______ can be applied whenthe bandwidth of a link (in hertz) is greater than the combined bandwidths of the signals to be transmitted. A) TDM B) FDM C) Both (a)or (b) D) Neither (a) or (b)

Last Answer : FDM

Description : The sharing of a medium and its link by two or more devices is called _______. A) modulation B) encoding C) line discipline D) multiplexing

Last Answer : multiplexing

Description : The carrier that handles inter-LATA services is calleda(n) _______. A) POP B) IXC C) LEC D) none of the above

Last Answer : IXC

Description : Internet-like networks between a company and its businesspartners. Select the best fit for answer: A. Bandwidth alternatives B. Switching alternating C. Inter organizational networks D. Extranets

Last Answer : Extranets

Description : Telecommunication networks frequently interconnect an organization with its customers and suppliers. Select the best fit foranswer: A. Bandwidth alternatives B. Switching alternating C. Inter organizational networks D. Extranets

Last Answer : Inter organizational networks

Description : Internet-like networks within an enterprise. A. Intranets B. Switching alternating C. Inter organizational networks D. Extranets

Last Answer : Intranets

Description : Which one of the following is not a function of network layer? a. routing b. inter-networking c. congestion control d. error contro

Last Answer : d. error control

Description : Which one of the following is not a function of network layer? a) routing b) inter-networking c) congestion control d) error control

Last Answer : d) error control

Description : The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as: a. modulation b. demodulation c. synchronizing d. digitising

Last Answer : digitising

Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. modem e. none of the above

Last Answer : modem