Description : In the power amplifier shown in figure 2-10, what two signals are mixed to produce the output signal?
Last Answer : Local oscillator and coherent oscillator.
Description : ______ is the first component of any MATV system to received broadcast signals. A. Receiver B. Antenna C. Filter D. Transmitter
Last Answer : B. Antenna
Description : Which receiver component converts the IF pulses to video pulses?
Last Answer : Detector.
Description : What receiver circuit actually produces the IF frequency?
Last Answer : Mixer.
Description : When no signal is being received, the loudspeaker is not entirely silent as a result of the presence of A. parasitic oscillations in some of the receiver stages. B. negative feedback in each stage. C. spurious frequencies as a result of improper neutralization. D. internal receiver noise.
Last Answer : D. internal receiver noise.
Description : ECE Board Exam March 1996 The capture area of an antenna is directly proportional to the A. frequency of the received signal B. distance between transmitter and receiver C. gain of the antenna D. power density of the signal
Last Answer : C. gain of the antenna
Description : When measuring receiver sensitivity, what quantities must you add to the dBm reading obtained on the signal generator or test set?
Last Answer : Attenuations of the directional coupler and the connecting cable.
Description : You determine receiver sensitivity by measuring the power level of what signal?
Last Answer : Minimum discernible signal (mds).
Description : what causes the initial and final pulses on the receiver output signal?
Last Answer : Leakage from the duplexer.
Description : . Which part of the receiver amplifies the electrical signal to a level suitable for further signal processing?
Last Answer : Amplifier.
Description : What does a tone control circuit in a receiver do to the audio signal?
Last Answer : It controls the amount of bass and treble response.
Description : Which of the following parts of the radio receiver represent the component that extracts the desire RF signal from the electromagnetic wave? A. AF amplifier B. Antenna C. Detector D. Crystal
Description : Which component in figure 3-7 develops the af signal at the input?
Last Answer : R1.
Description : What condition produces the 10-kHz error signal generated by the metering bridge in the HP- 431C power meter?
Last Answer : An unbalance in the metering bridge.
Description : Which type of optical fiber (multimode or single mode) tends to have lower loss and produces less signal distortion?
Last Answer : Single mode fiber.
Description : What component causes a generator to produce dc voltage rather than ac voltage at its output terminals?
Last Answer : A commutator
Description : The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the: w) emitter-base voltage x) base current y) collector current z) collector voltage
Last Answer : ANSWER: Y -- COLLECTOR CURRENT
Description : The best way to ensure that what a person has communicated has reached I receiver is: (a) To use simple words (b) To communicate when there is no disturbance (c) To communicate when the receiver is attentive (d) To ask the receiver to tell what they have received
Last Answer : (d) To ask the receiver to tell what they have received
Description : Which transmission technique guarantees that data packets will be received by the receiver in the same order in which they were sent by the sender? (A) Broadcasting (B) Unicasting (C) Packet Switching (D) Circuit Switching
Last Answer : (D) Circuit Switching
Description : What is the disadvantage of using a double receiver instead of two individual receivers?
Last Answer : If one of the receivers goes bad the entire unit must be replaced.
Description : When is a synchro receiver (TR) properly zeroed?
Last Answer : A TR is zeroed when electrical zero voltages exist across its stator windings at the same time its rotor is on zero or on its mechanical reference position.
Description : What is the most likely problem if the transmitter shaft reads 0º when the receiver shaft indicates 180º?
Last Answer : The rotor leads on either the transmitter or the receiver are reversed.
Description : What two receiver leads are reversed to reverse the rotor's direction of rotation?
Last Answer : 1 and S3.
Description : What is the relationship between the transmitter and receiver stator voltages when their rotors are in correspondence?
Last Answer : The voltages are equal and oppose each other.
Description : What is the physical difference between a synchro transmitter and a synchro receiver?
Last Answer : A synchro receiver uses some form of damping to retard excessive oscillations or spinning.
Description : Receiver bandwidth is defined as those frequencies spread between what two points of the receiver response curve?
Last Answer : Half-power points.
Description : A loss of receiver sensitivity has the same effect on range performance as what other loss?
Last Answer : Transmitter power loss.
Description : Where should the transmitter spectrum be located with respect to the receiver response curve?
Last Answer : In the center.
Description : A monopulse receiver has how many separate channels?
Last Answer : Three.
Description : How does ftc affect receiver gain, if at all?
Last Answer : FTC has no effect on receiver gain
Description : Immediately after the transmitter fires, stc reduces the receiver gain to what level?
Last Answer : Zero.
Description : What type of receiver is most often used in radar systems?
Last Answer : Superheterodyne.
Description : What tube in a duplexer has the primary function of disconnecting the receiver?
Last Answer : Tr tube.
Description : What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?
Last Answer : High vswr, which equates to poor reception or a loss of power output.
Description : Which amplifier stage (the preamplifier or the postamplifier) is a dominant contributor of noise and significantly influences the sensitivity of the receiver?
Last Answer : The preamplifier.
Description : Define receiver dynamic range.
Last Answer : The range of optical power levels over which the receiver operates within the specified values. It
Description : What is a fiber optic receiver?
Last Answer : An electro-optic device that accepts optical signals from an optical fiber and converts them into electrical signals
Description : What is the main factor that determines receiver sensitivity?
Last Answer : Noise
Description : List the main types of receiver noise.
Last Answer : Thermal noise, dark current noise, and quantum noise
Description : List the key operational parameters used to define receiver performance.
Last Answer : Receiver sensitivity, bandwidth, and dynamic range.
Description : What is the function of a crystal filter in a receiver?
Last Answer : It is used to achieve maximum selectivity.
Description : What two components give a ssb receiver its advantages over an AM superheterodyne receiver?
Last Answer : A special type of detector and a carrier reinsertion oscillator
Description : What are the four basic receiver characteristics?
Last Answer : Sensitivity, noise, selectivity, and fidelity.
Description : What four basic functions must a receiver perform?
Last Answer : Reception, selection, detection, and reproduction.
Description : What is the purpose of agc/avc in a receiver?
Last Answer : To limit unwanted variations in the output.
Description : What type of tuning does the receiver use?
Last Answer : Digital
Description : What function does a receiver transfer switchboard perform?
Last Answer : Transfers receiver audio outputs to remote control stations.
Description : What are the essential components of a cw receiver system?
Last Answer : An antenna, tank circuit for tuning, rectifier for detection, filter to give constant output, and an indicator device
Description : Which of the following is the basic component of a communications satellite receiver? A. On-board computer B. Reflector C. Telemetry D. Transponder
Last Answer : D. Transponder
Description : Rerout an IR signal to a receiver from a remote?
Last Answer : answer:Yes! You need an infrared repeater like this one or you can set up a series of mirrors to redirect the signal.