In communication systems, the modulating signal is also called

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In communication systems, the modulating signal is also called base band signal.

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Deemphasis in the receiver in effect attenuates modulating signal components and noise in what frequency range? A. dc B. low C. intermediate D. high

Description : Deemphasis in the receiver in effect attenuates modulating signal components and noise in what frequency range? A. dc B. low C. intermediate D. high

Last Answer : D. high

In radio signal emission designation, the fifth symbol means A. Details of signals B. Type of information transmitted C. Nature of multiplexing D. Nature of signal modulating the main carrier

Description : In radio signal emission designation, the fifth symbol means A. Details of signals B. Type of information transmitted C. Nature of multiplexing D. Nature of signal modulating the main carrier

Last Answer : C. Nature of multiplexing

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.

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.

One of the FM signal generator control which varies the phase of the modulating voltage applied to the oscillator of the sweep generator A. Band control B. Phase control C. Marker amplitude control D. Sweep output control

Description : One of the FM signal generator control which varies the phase of the modulating voltage applied to the oscillator of the sweep generator A. Band control B. Phase control C. Marker amplitude control D. Sweep output control

Last Answer : B. Phase control

If the percentage modulation of an AM amplifier is 88% and the modulating signal is 1 volt, the carrier has an amplitude of _______________. A. 1.14 volts B. 0.88 volt C. 1.88 volts D. 0.12 volt

Description : If the percentage modulation of an AM amplifier is 88% and the modulating signal is 1 volt, the carrier has an amplitude of _______________. A. 1.14 volts B. 0.88 volt C. 1.88 volts D. 0.12 volt

Last Answer : A. 1.14 volts

In_____ transmission, thephaseof the carrier signal is modulated to follow the changingvoltage level (amplitude) of the modulating signal. A) AM B) PM C) FM D) none of the above

Description : In_____ transmission, thephaseof the carrier signal is modulated to follow the changingvoltage level (amplitude) of the modulating signal. A) AM B) PM C) FM D) none of the above

Last Answer : PM

In_____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude)of the modulating signal. The peak amplitude and phase of the carrier signal remainconstant,but as the amplitudeof the information signal changes, thefrequency of thecarrier changes correspondingly. A) AM B) PM C) FM D) none of the above

Description : In_____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude)of the modulating signal. The peak amplitude and phase of the carrier signal remainconstant,but as ... of thecarrier changes correspondingly. A) AM B) PM C) FM D) none of the above

Last Answer : FM

In_____ transmission, thecarrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal. A) AM B) PM C) FM D) none of the above

Description : In_____ transmission, thecarrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal. A) AM B) PM C) FM D) none of the above

Last Answer : AM

What happens to an fm signal as you increase the frequency of the modulating signal?

Description : What happens to an fm signal as you increase the frequency of the modulating signal?

Last Answer : Both the bandwidth and the number of significant sidebands increase.

If a modulating wave is sampled 10 times per cycle with a 5-element binary code, how many bits of information are required to transmit the signal?

Description : If a modulating wave is sampled 10 times per cycle with a 5-element binary code, how many bits of information are required to transmit the signal?

Last Answer : 28. 50.

The modulation index of a FM Signal having modulating frequency 2 KHz and Max deviation is 10 KHz, is: -

Description : The modulation index of a FM Signal having modulating frequency 2 KHz and Max deviation is 10 KHz, is: -  a) 2 b) 5 c) 3 d) 4

Last Answer : The modulation index of a FM Signal having modulating frequency 2 KHz and Max deviation is 10 KHz, is: - 5

Satellites used for international communication are called

Last Answer : Satellites used for international communication are called Intelsat.

State the need of signal conditioning and signal processing .List applications of instrumentation amplifier.

Description : State the need of signal conditioning and signal processing .List applications of instrumentation amplifier.

Last Answer : * In an instrumentation system, a transducer is used for sensing various parameters. The output of transducer is an electrical signal proportional to the physical quantity sensed such as pressure, ... monitoring and control 5) Light intensity meter 6) Measurement of flow and thermal conductivity

Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle?

Description : Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

Last Answer : Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the

Description : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is

Last Answer : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is 32 Kbits/sec

The signal is extended from 96KHz to 100KHz, so the minimum sampling frequency required is...

Description : The signal is extended from 96KHz to 100KHz, so the minimum sampling frequency required is  (a) 8KHz (b) 200KHz (c) 4KHz (d) 100KHz

Last Answer : 200KHZ

The Ku frequency band used in satellite communication (for uplink and downlink) is:

Description : The Ku frequency band used in satellite communication (for uplink and downlink) is: (1) 14 GHz and 11 GHz (2) 30 GHz and 20 GHz (3) 70 GHz and 50 GHz (4) 60 GHz and 45 GHz 

Last Answer : The Ku frequency band used in satellite communication (for uplink and downlink) is: 14 GHz and 11 GHz 

The basic element of radio communication system which generates radio waves is

Description : The basic element of radio communication system which generates radio waves is  1. micro phone 2. transmitter 3.transmitting antenna 4. Loudspeaker 

Last Answer : The basic element of radio communication system which generates radio waves is transmitter 

A communication receiver is

Last Answer :  A communication receiver is a superheterodyne receiver.

Sound in TV is modulating - (1) AM (2) FM (3) PCM (4) PM

Description : Sound in TV is modulating - (1) AM (2) FM (3) PCM (4) PM

Last Answer : (1) AM

Transformers are used onboard ships with AC generators to _____________. A. change frequency B. increase power output to modulating frequency controllers C. decrease power output to modulating frequency controllers D. permit higher voltage for electric motor operation and low voltage for lighting circuits

Description : Transformers are used onboard ships with AC generators to _____________. A. change frequency B. increase power output to modulating frequency controllers C. decrease power output to modulating frequency ... D. permit higher voltage for electric motor operation and low voltage for lighting circuits

Last Answer : Answer: D

What is the approximate bandwidth of an FM system with 10 kHz of modulating frequency and a 150 kHz of frequency deviation? A. 300 kHz B. 320 kHz C. 150 kHz D. 200 kHz

Description : What is the approximate bandwidth of an FM system with 10 kHz of modulating frequency and a 150 kHz of frequency deviation? A. 300 kHz B. 320 kHz C. 150 kHz D. 200 kHz

Last Answer : B. 320 kHz

What is meant by the term deviation ratio? A. The ratio of the audio modulating frequency to the center carrier frequency. B. The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency. C. The ratio of the carrier center frequency to the audio modulating frequency. D. The ratio of the highest audio modulating frequency to the average audio modulating frequency.

Description : What is meant by the term deviation ratio? A. The ratio of the audio modulating frequency to the center carrier frequency. B. The ratio of the maximum carrier frequency deviation to the highest ... . D. The ratio of the highest audio modulating frequency to the average audio modulating frequency.

Last Answer : B. The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency.

What is meant by the term deviation ratio? A. The ratio of the carrier center frequency to the audio modulating frequency B. The ratio of the highest audio modulating frequency to the average audio modulating frequency C. The ratio of the maximum carrier frequency deviation to the highest audio modulation frequency D. The ratio of the audio modulating frequency to the center carrier frequency

Description : What is meant by the term deviation ratio? A. The ratio of the carrier center frequency to the audio modulating frequency B. The ratio of the highest audio modulating frequency to the ... audio modulation frequency D. The ratio of the audio modulating frequency to the center carrier frequency

Last Answer : C. The ratio of the maximum carrier frequency deviation to the highest audio modulation frequency

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

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

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

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

What does the simplest diode detector use to reproduce the modulating frequency?

Description : What does the simplest diode detector use to reproduce the modulating frequency?

Last Answer : The modulation envelope.

. What is the function of the modulating circuit?

Description : . What is the function of the modulating circuit?

Last Answer : To produce an af (or video) signal that can be superimposed on the rf signal produced by the oscillator.

To ensure the accuracy of a transmission, what is the minimum number of times a modulating wave should be sampled in pulse modulation?

Description : To ensure the accuracy of a transmission, what is the minimum number of times a modulating wave should be sampled in pulse modulation?

Last Answer : 2.5 times the highest modulating frequency.

With a single modulating tone, what is the amplitude of the sideband frequencies at 100-percent modulation?

Description : With a single modulating tone, what is the amplitude of the sideband frequencies at 100-percent modulation?

Last Answer : One-half the amplitude of the carrier.

In a FM system, the maximum deviation is 75KHz. Find bandwidth for modulating frequency i. fm=500Hz ii. fm=5KHz iii. fm=10KHz Draw conclusion for bandwidth of FM from answer.

Description : In a FM system, the maximum deviation is 75KHz. Find bandwidth for modulating frequency i. fm=500Hz ii. fm=5KHz iii. fm=10KHz Draw conclusion for bandwidth of FM from answer.

Last Answer : Given deviation∆=75kHz i) fm=500Hz bandwidth B.W=2(∆+fm)  =2(75k+500)=151kHz  ii). fm=5KHz bandwidth B.W=2(∆+fm)  =2(75k+5k)=160KHz iii) fm=10KHz bandwidth B.W=2(∆+fm)  =2(75k+10k)=170KHz As the modulating frequency increases bandwidth also increases.

Compare narrow band FM with wide-band FM w.r.t. following points. (i) Modulation index (ii) Maximum deviation (iii)Range of modulating frequency (iv)Application

Description : Compare narrow band FM with wide-band FM w.r.t. following points. (i) Modulation index (ii) Maximum deviation (iii)Range of modulating frequency (iv)Application

Last Answer : Sr. No Parameters Narrow band FM Wide band FM 1 Modulation index Less than or slightly greater than 1 Greater than 1  2 Maximum deviation ... like police wireless, ambulance etc. Entertainment broadcasting can be used for high quality music transmission 

Cell regulation can be thought of as the effector side of cell communication. Most commonly cell regulation occurs by means of extracellular chemical messengers. Which of the following statement(s) is/are true concerning these messengers? a. Paracrine regulation involves a messenger which is produced and acts systemically b. The extracellular signal or stimulus is received by a receptor on or in the target cell c. Neurocrine regulation depends on a physical connection between the neuron and the target cell d. Most hormones, local mediators, and neurotransmitters readily cross the cell plasma membrane

Description : Cell regulation can be thought of as the effector side of cell communication. Most commonly cell regulation occurs by means of extracellular chemical messengers. Which of the following statement(s ... d. Most hormones, local mediators, and neurotransmitters readily cross the cell plasma membrane

Last Answer : Answer: b, c Depending on how the extracellular messenger arrives, cell regulation can be classified as paracrine, endocrine, or neurocrine. In paracrine regulation, a chemical messenger ... , local mediators, and neurotransmitters are water-soluble and cannot readily cross the plasma membrane

Designed to receive a signal from a transmitting station on the ground and retransmit it to a receiving station located elsewhere A. Communication satellite B. Repeater C. Relay station D. Transponder

Description : Designed to receive a signal from a transmitting station on the ground and retransmit it to a receiving station located elsewhere A. Communication satellite B. Repeater C. Relay station D. Transponder

Last Answer : A. Communication satellite

Technical study which deals with production, transport and delivery of a quality signal from source to destination. A. Transmission system engineering B. Communication system engineering C. Telephony engineering D. Telegraphic engineering

Description : Technical study which deals with production, transport and delivery of a quality signal from source to destination. A. Transmission system engineering B. Communication system engineering C. Telephony engineering D. Telegraphic engineering

Last Answer : A. Transmission system engineering

At the end of communication system, the signal is converted from radio toA. soundB. mechanical energyC. kinetic energyD. potential energy

Description : At the end of communication system, the signal is converted from radio to A. sound B. mechanical energy C. kinetic energy D. potential energy

Last Answer : sound

The basic function of technology 'Blue tooth' is to allow a)Landline phone to mobile phone communication b)Signal transmission on mobile phones only c)Satellite television communication d)Wireless communication between equipment.

Description : The basic function of technology 'Blue tooth' is to allow a)Landline phone to mobile phone communication b)Signal transmission on mobile phones only c)Satellite television communication d)Wireless communication between equipment.

Last Answer : d)Wireless communication between equipment.

Communication satellite are used to a) Transmit communication signal only b)Receive Communication signal only c)Receive and redirect communication signal d)Provides information of natural resources only

Description : Communication satellite are used to a) Transmit communication signal only b)Receive Communication signal only c)Receive and redirect communication signal d)Provides information of natural resources only

Last Answer : c)Receive and redirect communication signal

'Blue tooth' technology allows - 1) Landline phone to mobile phone communication 2) Signal transmission on mobile phones only 3) Wireless communication between equipments 4) Satellite television communication

Description : 'Blue tooth' technology allows - 1) Landline phone to mobile phone communication 2) Signal transmission on mobile phones only 3) Wireless communication between equipments 4) Satellite television communication

Last Answer : 3) Wireless communication between equipments

As they walk to the car, Elaine tells her sales representative that they may need to modify the price structure they just presented to the prospect. Elaine bases her statement on the way the prospect folded his arms when he was quoted quoted prices on the new system. The sales representative he didn't notice that. Elaine recommends a book on __________ communication. A)tactile B)proxemic C)kinesic D)verbal E)signal

Description : As they walk to the car, Elaine tells her sales representative that they may need to modify the price structure they just presented to the prospect. Elaine bases her statement on the way the ... Elaine recommends a book on __________ communication. A)tactile B)proxemic C)kinesic D)verbal E)signal

Last Answer : C)kinesic

Which one of the following can be termed as verbal communication ? (A) Prof. Sharma delivered the lecture in the class room. (B) Signal at the cross-road changed from green to orange. (C) The child was crying to attract the attention of the mother. (D) Dipak wrote a letter for leave application.

Description : Which one of the following can be termed as verbal communication ? (A) Prof. Sharma delivered the lecture in the class room. (B) Signal at the cross-road changed from green to orange. (C) The child was crying to attract the attention of the mother. (D) Dipak wrote a letter for leave application.

Last Answer : Answer: C  Verbal communication Effective verbal or spoken communication is dependent on a number of factors and cannot be fully isolated from other important interpersonal skills such as non-verbal ... intensively during human childhood. The communication is two way process instead of one way. 

Communication satellites are used to: (1) To transmit communication signals (2) To receive and redirect communication signals (3) To only receive communication signal (4) To provide information of national sources only

Description : Communication satellites are used to: (1) To transmit communication signals (2) To receive and redirect communication signals (3) To only receive communication signal (4) To provide information of national sources only

Last Answer : To receive and redirect communication signals

Distortion caused on telephone line by an adjacent one is called:

Last Answer : Distortion caused on telephone line by an adjacent one is called: Cross talk

Noise always affects the signal in a communications systems at the ________. A. transmitter B. channel C. information source D. destination

Description : Noise always affects the signal in a communications systems at the ________. A. transmitter B. channel C. information source D. destination

Last Answer : B. channel

Which performance parameter is the minimum amount of optical power required to achieve a specific bit-error rate (BER) in digital systems or a given signal-to-noise ratio (SNR) in analog systems?

Description : Which performance parameter is the minimum amount of optical power required to achieve a specific bit-error rate (BER) in digital systems or a given signal-to-noise ratio (SNR) in analog systems?

Last Answer : Receiver sensitivity.

This bistable electronic device assumes one of two stable output states, depending upon the state of the most recently applied input signal. In computer systems this device is used for storing information. Name this common electronic device.

Description : This bistable electronic device assumes one of two stable output states, depending upon the state of the most recently applied input signal. In computer systems this device is used for storing information. Name this common electronic device.

Last Answer : ANSWER: FLIP-FLOP or TOGGLE

Write the types of wireless communication systems ?

Description : Write the types of wireless communication systems ?

Last Answer : Types of Wireless Communication Systems Wireless communication can be divided into 4 (four) segments based on geographical location or distance between devices such as: Wireless Personal Area Network ( ... Local Area Network (WLAN) Wireless Metropolitan Area Network (WMAN) Wireless Network (WWAN)

What is the Basic support structures such as communication and power systems?

Description : What is the Basic support structures such as communication and power systems?

Last Answer : bv

How did communication systems during the civil war influenced Texas?

Description : How did communication systems during the civil war influenced Texas?

Last Answer : There was no communication systems in the civil war. The onlysystem was the telegraph and that was often cut.

Which one of the following categories of persons is not treated at par so far as the availability of Fundamental Rights is concerned? (1) Members of the armed forces (2) Members of the forces charged with the responsibility of maintenance of public order (3) Members of the forces employed in connection with the communication systems set up in the country (4) Members of the forces employed in connection with the communication systems set up for maintenance of public order

Description : Which one of the following categories of persons is not treated at par so far as the availability of Fundamental Rights is concerned? (1) Members of the armed forces (2) Members of ... Members of the forces employed in connection with the communication systems set up for maintenance of public order

Last Answer : a) Members of the armed forces Explanation: Members of Armed Forces are not treated at par so far as the availability of Fundamental Rights is concerned.