What is a frequency discriminator? A. A circuit for filtering two closely adjacent signals B. A circuit for detecting FM signals C. An FM generator D. An automatic bandswitching circuit.

What is a frequency discriminator?
A. A circuit for filtering two closely adjacent signals
B. A circuit for detecting FM signals
C. An FM generator
D. An automatic bandswitching circuit.
by

1 Answer

Answer :

B. A circuit for detecting FM signals
by

Related questions

A particular circuit that rids FM of noise A. Detector B. Discriminator C. Phase Shifter D. Limiter

Description : A particular circuit that rids FM of noise A. Detector B. Discriminator C. Phase Shifter D. Limiter

Last Answer : D. Limiter

In an FM receiver, which circuit removes amplitude variations? A. Exciter B. Mixer C. Discriminator D. Limiter

Description : In an FM receiver, which circuit removes amplitude variations? A. Exciter B. Mixer C. Discriminator D. Limiter

Last Answer : D. Limiter

Which circuit detects frequency modulated signal? A. Modulator B. Discriminator C. Demodulator D. Modem

Description : Which circuit detects frequency modulated signal? A. Modulator B. Discriminator C. Demodulator D. Modem

Last Answer : B. Discriminator

What type of modulation is used on voice and video signals? A. AM B. FM C. SSB D. QPSK

Description : What type of modulation is used on voice and video signals? A. AM B. FM C. SSB D. QPSK

Last Answer : B. FM

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

What is the typical center frequency spacing between adjacent channels (transponders) in satellites? A. 36 MHz B. 40 MHz C. 500 MHz D. 4 MHz

Description : What is the typical center frequency spacing between adjacent channels (transponders) in satellites? A. 36 MHz B. 40 MHz C. 500 MHz D. 4 MHz

Last Answer : B. 40 MHz

What is the channel number of an FM station with a carrier frequency of 99.5 MHz? A. 256 B. 258 C. 257 D. 259

Description : What is the channel number of an FM station with a carrier frequency of 99.5 MHz? A. 256 B. 258 C. 257 D. 259

Last Answer : B. 258

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

An FM receiver whose intermediate frequency is 10.7 MHz, is experiencing image channel interference from a station transmitting on 121.1 MHz. If the local oscillator is tracking above, the receiver is tuned to A. 131.8 MHz B. 110.4 MHz C. 142.5 MHz D. 99.7 MHz

Description : An FM receiver whose intermediate frequency is 10.7 MHz, is experiencing image channel interference from a station transmitting on 121.1 MHz. If the local oscillator is tracking above, the receiver is tuned to A. 131.8 MHz B. 110.4 MHz C. 142.5 MHz D. 99.7 MHz

Last Answer : D. 99.7 MHz

What is the deviation ratio for an FM-phone signal having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3kHz? A. 60 B. 0.16 C. 0.6 D. 1.66

Description : What is the deviation ratio for an FM-phone signal having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3kHz? A. 60 B. 0.16 C. 0.6 D. 1.66

Last Answer : D. 1.66

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.

Both frequency and phase modulation utilize ________ modulation A. Phase B. AM and FM C. Digital D. Angle

Description : Both frequency and phase modulation utilize ________ modulation A. Phase B. AM and FM C. Digital D. Angle

Last Answer : D. Angle

Which determines the number of sideband components of FM? A. Modulation frequency B. Modulation index C. Carrier frequency D. All of these

Description : Which determines the number of sideband components of FM? A. Modulation frequency B. Modulation index C. Carrier frequency D. All of these

Last Answer : B. Modulation index

The frequency spectrum of the stereophonic FM signal. A. 67 kHz B. 59.5 to 74.5 kHz C. 19 to 38 kHz D. 30 to 53 kHz

Description : The frequency spectrum of the stereophonic FM signal. A. 67 kHz B. 59.5 to 74.5 kHz C. 19 to 38 kHz D. 30 to 53 kHz

Last Answer : D. 30 to 53 kHz

The local loop of the telephone system is understood to be A. a single piece of wire connecting the subscriber’s telephone set to another telephone set in an adjacent room B. a two-wire or four-wire communication circuit between the customer’s premise and central office C. a four-wire circuit connecting a facsimile machine to a computer D. a group of wires connecting a telephone set to a modem

Description : The local loop of the telephone system is understood to be A. a single piece of wire connecting the subscriber's telephone set to another telephone set in an adjacent room B. a two-wire or four- ... a facsimile machine to a computer D. a group of wires connecting a telephone set to a modem

Last Answer : B. a two-wire or four-wire communication circuit between the customer’s premise and central office

What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array? A. Radial divider B. Divider/combiner C. Radial combiner D. Radial multiplexer

Description : What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array? A. Radial divider B. Divider/combiner C. Radial combiner D. Radial multiplexer

Last Answer : A. Radial divider

A form of regenerative repeater for transmitting signals over a long cable received through a relay in a clearer form. A. Active generator B. Active repeater C. Interpolator D. Audio generator

Description : A form of regenerative repeater for transmitting signals over a long cable received through a relay in a clearer form. A. Active generator B. Active repeater C. Interpolator D. Audio generator

Last Answer : C. Interpolator

What particular circuit that rids FM of noise? A. HPF B. Phase shifter C. Limiter D. LPF

Description : What particular circuit that rids FM of noise? A. HPF B. Phase shifter C. Limiter D. LPF

Last Answer : C. Limiter

What type of tank circuit is used in the Foster-Seeley discriminator?

Description : What type of tank circuit is used in the Foster-Seeley discriminator?

Last Answer : A double-tuned tank circuit.

What is the proper procedure for suppressing electrical noise in a mobile station? A. Apply shielding and filtering where necessary B. Insulate a all plain sheet metal surfaces from each other C. Apply anti-static spray liberally to all nonmetallic D. Install filter capacitors in series with all dc wiring

Description : What is the proper procedure for suppressing electrical noise in a mobile station? A. Apply shielding and filtering where necessary B. Insulate a all plain sheet metal surfaces from each other C. ... -static spray liberally to all nonmetallic D. Install filter capacitors in series with all dc wiring

Last Answer : A. Apply shielding and filtering where necessary

____ system transmits frequency-division-multiplexed voice band signals over a coaxial cable for distances up to 4000 miles. A. T carrier B. X carrier C. L carrier D. F carrier

Description : ____ system transmits frequency-division-multiplexed voice band signals over a coaxial cable for distances up to 4000 miles. A. T carrier B. X carrier C. L carrier D. F carrier

Last Answer : C. L carrier

A method of expressing the amplitude of complex non-periodic signals such as speech. A. Frequency B. Wavelength C. Volume D. Pitch

Description : A method of expressing the amplitude of complex non-periodic signals such as speech. A. Frequency B. Wavelength C. Volume D. Pitch

Last Answer : C. Volume

What does the noise weighting curve shows? A. Noise signals measured with a 144 handset B. Power levels of noise found in carrier systems C. The interfering effect of other frequencies in a voice channel compared with a reference frequency of one kilohertz D. Interfering effects of signals compared with a 3-kHz tone

Description : What does the noise weighting curve shows? A. Noise signals measured with a 144 handset B. Power levels of noise found in carrier systems C. The interfering effect of other frequencies in a voice ... a reference frequency of one kilohertz D. Interfering effects of signals compared with a 3-kHz tone

Last Answer : C. The interfering effect of other frequencies in a voice channel compared with a reference frequency of one kilohertz

ECE Board Exam March 1996 What is the purpose of a beat frequency oscillator (BFO)? A. Aid in the reception of weak voice-modulated signals B. Generates a signal, whose frequency is the same as that of the intermediate frequency C. Generates a 1kHz note for Morse code reception D. Generates an output, whose frequency differs from that of the intermediate frequency by 1 kHz

Description : ECE Board Exam March 1996 What is the purpose of a beat frequency oscillator (BFO)? A. Aid in the reception of weak voice-modulated signals B. Generates a signal, whose frequency is the ... reception D. Generates an output, whose frequency differs from that of the intermediate frequency by 1 kHz

Last Answer : C. Generates a 1kHz note for Morse code reception

ECE Board Exam March 1996 What is the purpose of the receiver’s squelch circuit? A. To overcome fluctuations in the level the RF signal arriving at the receiver antenna B. To prevent fluctuations in the AGC bias level C. To reduce the receiver’s sensitivity to all incoming signals D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

Description : ECE Board Exam March 1996 What is the purpose of the receiver's squelch circuit? A. To overcome fluctuations in the level the RF signal arriving at the receiver antenna B. To prevent ... signals D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

Last Answer : D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

ECE Board Exam March 1996 Crosstalk coupling is ___________. A. dBm (disturbing pair) minus dBm (disturbed pair) B. the difference between readings on a cable pair with a tone and a cable pair without tone read at the far end of a cable C. signals from one circuit that get into another circuit D. All of these are true

Description : ECE Board Exam March 1996 Crosstalk coupling is ___________. A. dBm (disturbing pair) minus dBm (disturbed pair) B. the difference between readings on a cable pair with a tone and a cable pair without ... a cable C. signals from one circuit that get into another circuit D. All of these are true

Last Answer : D. All of these are true

___________ is device that measures the internal open circuit voltage of an equivalent noise generator having an impedance of 600Ω and delivering noise power to a 600 Ω load. A. Psophometer B. Barometer C. Reflectometer D. Voltmeter

Description : ___________ is device that measures the internal open circuit voltage of an equivalent noise generator having an impedance of 600Ω and delivering noise power to a 600 Ω load. A. Psophometer B. Barometer C. Reflectometer D. Voltmeter

Last Answer : A. Psophometer

What mathematical plane figure is ideal in cellular system design and engineering it graphically and functionally depicts overlapping radio coverage between and among adjacent cell base stations? A. Hexagon B. Octagon C. Pentagon D. Nonagon

Description : What mathematical plane figure is ideal in cellular system design and engineering it graphically and functionally depicts overlapping radio coverage between and among adjacent cell base stations? A. Hexagon B. Octagon C. Pentagon D. Nonagon

Last Answer : A. Hexagon

What is the effect in over modulated amplitude modulated radio broadcasting transmission? A. Interference to adjacent channel B. Higher fidelity C. Increase noise D. Higher audio signal

Description : What is the effect in over modulated amplitude modulated radio broadcasting transmission? A. Interference to adjacent channel B. Higher fidelity C. Increase noise D. Higher audio signal

Last Answer : A. Interference to adjacent channel

_______ is the transmission of sound from one room to an adjacent room thru common walls, floors or ceilings. A. Reverberation B. Refraction C. Flanking transmission D. Reflection

Description : _______ is the transmission of sound from one room to an adjacent room thru common walls, floors or ceilings. A. Reverberation B. Refraction C. Flanking transmission D. Reflection

Last Answer : C. Flanking transmission

Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators and SCR trigger circuits B. class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above

Description : Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators ... . class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above

Last Answer : Answer: A

______ polarization is employed in FM broadcasting A. Horizontal B. Vertical C. Circular D. Bidirectional

Description : ______ polarization is employed in FM broadcasting A. Horizontal B. Vertical C. Circular D. Bidirectional

Last Answer : A. Horizontal

Which does not use vertical polarization antenna? A. AM Broadcasting B. FM Broadcasting C. Mobile Communications D. Satellite Communications

Description : Which does not use vertical polarization antenna? A. AM Broadcasting B. FM Broadcasting C. Mobile Communications D. Satellite Communications

Last Answer : B. FM Broadcasting

What modulation is normally used with digital data? A. AM B. FM C. SSB D. QPSK

Description : What modulation is normally used with digital data? A. AM B. FM C. SSB D. QPSK

Last Answer : D. QPSK

What is the spectrum of stereophonic FM signal? A. 19 to 38 kHz B. 30 to 53 kHz C. 59.5 to 74.5 kHz D. 88 to 108 MHz

Description : What is the spectrum of stereophonic FM signal? A. 19 to 38 kHz B. 30 to 53 kHz C. 59.5 to 74.5 kHz D. 88 to 108 MHz

Last Answer : B. 30 to 53 kHz

Cellular radios use FM with a maximum deviation of A. ±30 khz B. ±75 khz C. ±25 khz D. ±12 khz

Description : Cellular radios use FM with a maximum deviation of A. ±30 khz B. ±75 khz C. ±25 khz D. ±12 khz

Last Answer : D. ±12 khz

Most AM broadcasts employ ___ polarization while most FM broadcasts employ ___ polarization of the radio wave. A. vertical, vertical B. vertical, horizontal C. horizontal, vertical D. horizontal, horizontal

Description : Most AM broadcasts employ ___ polarization while most FM broadcasts employ ___ polarization of the radio wave. A. vertical, vertical B. vertical, horizontal C. horizontal, vertical D. horizontal, horizontal

Last Answer : B. vertical, horizontal

How many FM stations would be accommodated I an ordinary TV channel? A. 33 B. 30 C. 40 D. 25

Description : How many FM stations would be accommodated I an ordinary TV channel? A. 33 B. 30 C. 40 D. 25

Last Answer : B. 30

With which emission type is the capture-effect most pronounced? A. CW B. FM C. SSB D. AM

Description : With which emission type is the capture-effect most pronounced? A. CW B. FM C. SSB D. AM

Last Answer : B. FM

The final power amplifier in an FM transmitter usually operates class ______. A. AB B. C C. B D. A

Description : The final power amplifier in an FM transmitter usually operates class ______. A. AB B. C C. B D. A

Last Answer : B. C

The allowable deviation ratio of commercial FM broadcast. A. 25 B. 15 C. 5 D. 75

Description : The allowable deviation ratio of commercial FM broadcast. A. 25 B. 15 C. 5 D. 75

Last Answer : C. 5

The final amplifier of either FM or AM transmitter operates as A. Class B B. Class C C. Class A D. Class D

Description : The final amplifier of either FM or AM transmitter operates as A. Class B B. Class C C. Class A D. Class D

Last Answer : B. Class C

Which of the following filters block FM radio band for TV channels (2 to 13)? A. High-pass filter B. Band reject filter C. Low-pass filter D. Band-pass filter

Description : Which of the following filters block FM radio band for TV channels (2 to 13)? A. High-pass filter B. Band reject filter C. Low-pass filter D. Band-pass filter

Last Answer : B. Band reject filter

After the IF stages have been aligned, the next stage to align in FM receiver is. A. local oscillator B. limiter stage C. RF amplifier D. mixer stage

Description : After the IF stages have been aligned, the next stage to align in FM receiver is. A. local oscillator B. limiter stage C. RF amplifier D. mixer stage

Last Answer : A. local oscillator

The carrier swing necessary to provide 80% modulation in the FM broadcasting band is __________. A. 150 kHz B. 120 kHz C. 60 kHz D. 75 kHz

Description : The carrier swing necessary to provide 80% modulation in the FM broadcasting band is __________. A. 150 kHz B. 120 kHz C. 60 kHz D. 75 kHz

Last Answer : B. 120 kHz

ECE Board Exam March 1996 The method of generating FM used by broadcasting station is A. direct B. all of these C. indirect D. insertion

Description : ECE Board Exam March 1996 The method of generating FM used by broadcasting station is A. direct B. all of these C. indirect D. insertion

Last Answer : C. indirect

The use of telecommunication for automatic indicating or recording measurement at the distance from the measuring instrument. A. Monitoring B. Tracking C. Telemetry D. Telecommand

Description : The use of telecommunication for automatic indicating or recording measurement at the distance from the measuring instrument. A. Monitoring B. Tracking C. Telemetry D. Telecommand

Last Answer : C. Telemetry

ECE Board Exam March 1996 LORAN is a navigation system used primarily for A. approach control B. obtaining fixes over large distances C. blind landing D. automatic collision warning

Description : ECE Board Exam March 1996 LORAN is a navigation system used primarily for A. approach control B. obtaining fixes over large distances C. blind landing D. automatic collision warning

Last Answer : B. obtaining fixes over large distances

ECE Board Exam March 1996 LORAN is a navigational system used primarily for _____________. A. blind landing B. obtaining your fixes location over large distances C. automatic collision warning D. approach control

Description : ECE Board Exam March 1996 LORAN is a navigational system used primarily for _____________. A. blind landing B. obtaining your fixes location over large distances C. automatic collision warning D. approach control

Last Answer : B. obtaining your fixes location over large distances