Description : What is the purpose of a demodulator in a servo system?
Last Answer : To convert an ac error signal into a dc error signal.
Description : In computing, how is a modulator-demodulator more commonly known?
Last Answer : Modem
Description : Which circuit contributes most of the noise in a receiver? A. IF amplifier B. Demodulator C. AF amplifier D. Mixer
Last Answer : D. Mixer
Description : Which circuit detects frequency modulated signal? A. Modulator B. Discriminator C. Demodulator D. Modem
Last Answer : B. Discriminator
Description : In a synchronous modem, the digital-to-analog converter transmits signal to the a. equilizer b. modulator c. demodulator d. terminal e. none of aobve
Last Answer : equilizer
Description : The term modem is a composite word that refers to the two functional entities that make up the device: asignal _______ and a signal _______. A) modulator; demodulator B) demodulator; modulator C) modern;demo D) none of the above
Last Answer : modulator; demodulator
Description : The basic modulator and demodulator circuits in PSK are:
Last Answer : Balanced modulators
Description : The best frequency demodulator is the:
Last Answer : PLL discriminato
Description : Draw and explain PLL as an FM demodulator.
Last Answer : Explanation:- FM signal which is to be demodulated is applied to input of PLL.VCO output must be identical to input signal if PLL is to remain locked. As PLL is locked, VCO ... error voltage represents the modulating signal. Thus at the error amplifier output we get demodulated FM output.
Description : The name “modem” is derived from (1) modern demarkator (2) modulator demand (3) modern demodulator (4) modulator demodulator
Last Answer : modulator demodulator
Description : Draw block diagram of PLL as a FM demodulator. Explain function of each block.
Last Answer : Operation: The FM signal which is to be demodulated is applied at the input of the PLL. the PLL is locked to the FM The error voltage produced at ... using PLL ensures a high Linearity, between the instantaneous input frequency and VCO control voltage (error amplifier output)
Description : What are the three basic requirements for sound?
Last Answer : A source, medium, and detector (receiver).
Description : What are the three requirements for a wave to be propagated?
Description : What are the three requirements for an operational amplifier?
Last Answer : . Very high gain, very high input impedance, very low output
Description : What are the three requirements necessary for oscillations to exist in a circuit?
Last Answer : Amplification, regenerative feedback, and frequency-determining device.
Description : What are the three fundamental requirements of a military communications system?
Last Answer : Reliability, security, and speed.
Description : What are the three requirements for cw transmission?
Last Answer : A method of generating oscillations, a method of turning the oscillations on and off (keying), and an antenna to radiate the energy.
Description : What are the basic requirements for any splice or terminal connection?
Last Answer : The connection must be both mechanically and electrically as strong as the conductor or device with which it is used
Description : What are the requirements for an integration circuit?
Last Answer : The time constant is long and the output is taken across the capacitor in an RC circuit.
Description : What type of tube best meets the requirements of a modulator switching element?
Last Answer : Thyratron.
Description : What basic circuits meet the requirements of an externally synchronized master oscillator?
Last Answer : Sine-wave oscillator, single-swing blocking oscillator, and master trigger (astable) multivibrator.
Description : Training requirements for (2M) repair personnel were developed under guidelines established by what organization?
Last Answer : Chief of Naval Operations (CNO).
Description : When you replace components, identification marks must meet what requirements?
Last Answer : They should be readable from a single point.
Description : Who is responsible for meeting environmental and electrical requirements of a system?
Last Answer : Equipment designers (planners).
Description : In what publication are environmental requirements for equipment defined?
Last Answer : Procurement specifications.
Description : Which of the above requirements is most important?
Last Answer : . Reliability.