Description : What term is used to describe the product of pulse width and pulse-repetition frequency?
Last Answer : Duty cycle.
Description : What is Astable Multivibrator?
Last Answer : Astable Multivibrator is a square wave circuit. It has two quasi stable states. It is also referred as free running Multivibrator.
Description : What is an astable multivibrator?
Last Answer : Astable multivibrator is a free running oscillator having two quasi-stable states. Thus, there is oscillations between these two states and no external signal are required to produce the change in state.
Description : circuit diagram of Astable Multivibrator with any two application.
Last Answer : Applications of Astable Multivibrator 1. It is used in square wave generator. 2. It is used for voltage to frequency converters. 3. In ramp generator. 4. In flasher circuit.
Description : Why do 2D air-search radars use relatively low carrier frequencies and low pulse-repetition rates?
Last Answer : Increased maximum range.
Description : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Last Answer : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Description : The circuit shown in the illustration functions as a ____________. EL-0087 A. pulse trigger circuit for an operational amplifier B. three stage, high gain class 'A' amplifier C. binary ripple counter or shift register D. free running multivibrator
Last Answer : Answer: C
Description : Which is the proper measurement of average power emitted by a pulsed laser? a. Energy x time b. Pulse energy x repetition rate c. Pulse energy / repetition rate d. Peak power x pulse length
Last Answer : b. Pulse energy x repetition rate
Description : Which is the proper measurement of average power emitted by a pulsed laser? ∙ a. Energy x time ∙ b. Pulse energy x repetition rate ∙ c. Pulse energy / repetition rate ∙ d. Peak power x pulse length
Last Answer : ∙ b. Pulse energy x repetition rate
Description : In a bistable multivibrator, how many trigger pulses are needed to produce one complete cycle in the output?
Last Answer : Two.
Description : What is another name for the monostable multivibrator?
Last Answer : One-shot.
Description : What type of multivibrator has two stable states?
Last Answer : Bistable.
Description : What type of multivibrator does not have a stable state?
Last Answer : Astable.
Description : What is needed to use a monostable or one-shot multivibrator for a clock circuit?
Last Answer : Triggers.
Description : What type of multivibrator can be used as a radar master oscillator?
Last Answer : Free-running.
Description : What circuit section is required in the output of a multivibrator modulator to eliminate unwanted output frequencies?
Last Answer : An LCR filter.
Description : What is pulse-frequency modulation?
Last Answer : A method of pulse modulation in which a modulating wave is used to frequency modulate a pulse-generating circuit
Description : What three components determine the address that locates where on a floppy disk the computer will store the data?
Last Answer : a. disk side number, b. track number, and c. sector number.
Description : Define Astable Multivibrators.
Last Answer : The astable Multivibrators toggles between one state and the other without the influence of any other external control signal. It is also called as free running multivibrator.
Description : List the applications of 555 timer in Astable mode of operation
Last Answer : *FSK generator *Pulse-position modulator
Description : What compone What components What components can be used to increase the high frequency response of an amplifier?
Last Answer : Peaking coils.
Description : What two variables determine the primary frequency of a resonant cavity?
Last Answer : Size and shape of the cavity.
Description : What device sweeps a band of frequencies to determine frequencies and amplitudes of each frequency component?
Last Answer : Spectrum analyzer.
Description : What two specifications determine the maximum frequency that a recorder's record and reproduce heads will be able to transfer?
Last Answer : a. Size of the headgap. b. Speed of the magnetic tape.
Description : What two factors determine the frequency of the output voltage of an alternator?
Last Answer : Speed of rotation and number of poles.
Description : What component in a blocking oscillator controls pulse width?
Last Answer : Transformer.
Description : The spectrum of a radar transmitter describes what characteristic of the output pulse?
Last Answer : Frequency distribution
Description : What signal is used to synchronize the coherent oscillator to a fixed phase relationship with the transmitted pulse?
Last Answer : Coho lock pulse.
Description : In addition to a flat top, what characteristics must a modulator pulse have?
Last Answer : Steep leading and trailing edges.
Description : What controls transmitter pulse width?
Last Answer : The modulator.
Description : The range sweep in a range-gate generator is started at the same time as what other pulse?
Last Answer : Transmitter.
Description : What width is the pulse radiated by fire-control tracking radar?
Last Answer : Very narrow.
Description : When a transmitter uses a high-power oscillator to produce the output pulse, what switches the oscillator on and off?
Last Answer : High-voltage pulse from the modulator.
Description : What special requirement is the pulse counting accelerometer designed for?
Last Answer : When digital data is required from an accelerometer.
Description : If the length of the fiber point defect changes with pulse duration, is the OTDR signal deviation a point defect or a region of high fiber attenuation?
Last Answer : A point defect.
Description : Modes of a light pulse that enter the fiber at one time exit the fiber at different times. This condition causes the light pulse to spread. What is this condition called?
Last Answer : Modal dispersion.
Description : Which digital data encoding method records a digital one as a positive pulse and a digital (zero) as a negative pulse and returns the tape to neutral between pulses?
Last Answer : Return-to-zero (RZ) encoding.
Description : How is conversion used in pulse demodulation?
Last Answer : Ppm, pfm, and pcm are converted to either pdm or pam for demodulation.
Description : What characteristic of a pulse does a peak detector sample?
Last Answer : Pulse amplitude or pulse duration
Description : What minimum/maximum voltage level can be attained in the pulse generator section by adjusting the LEVEL control?
Last Answer : 0 to 5 volts.
Description : What is the primary advantage of pulse-modulation systems?
Last Answer : . Low susceptibility to noise.
Description : Pulse-code modulation requires the use of approximations of value that are obtained by what process?
Last Answer : Quantization.
Description : What is the main disadvantage of pulse-position modulation?
Last Answer : It requires synchronization between the transmitter and receiver.
Description : Which edges of the pulse can be modulated in pulse duration modulation?
Last Answer : Either, or both at the same time.
Description : What characteristics of a pulse can be changed in pulse time modulation?
Last Answer : The time duration of the pulses or the time of occurrence of the pulses.
Description : What, if any, noise susceptibility advantage exists for pulse-amplitude modulation over analog amplitude modulation?
Last Answer : Both are susceptible to noise and interference
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.
Description : What action is necessary to impress intelligence on the pulse train in pulse modulation?
Last Answer : Some characteristic of the pulses has to be varied.