Description : What capability does a transmitter transfer switchboard provide?
Last Answer : Transferring remote control functions and signals to transmitters.
Description : What four basic functions must a receiver perform?
Last Answer : Reception, selection, detection, and reproduction.
Description : The purpose of the automatic bus transfer shown in the illustration is to ___________. EL-0014 A. stepdown voltage to the lighting distribution panel B. provide emergency power to ... emergency switchboard from the main switchboard D. provide overcurrent protection to the lighting distribution panel
Last Answer : Answer: B
Description : Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions? A. The generator and bus transfer section B. The 450 volt, 60 cycle, 3 phase bus C. The 120 volt, 3 phase, 60 cycle bus D. The 24 volt DC bus
Last Answer : Answer: D
Description : What tube in a duplexer has the primary function of disconnecting the receiver?
Last Answer : Tr tube.
Description : What is the function of a crystal filter in a receiver?
Last Answer : It is used to achieve maximum selectivity.
Description : J-K FFs used in counters are wired to perform what function?
Last Answer : Toggle.
Description : Automatic voltage regulators provided on switchboards function to _____________. A. regulate the AC load on the generator B. protect the switchboard from high voltage C. govern prime mover speed to control voltage D. vary the field excitation to the generators
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 : 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 : 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 : 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 : Which component of the receiver produces the signal that is mixed with the received signal to produce the IF signal?
Last Answer : Local oscillator.
Description : What type of receiver is most often used in radar systems?
Last Answer : Superheterodyne.
Description : what causes the initial and final pulses on the receiver output signal?
Last Answer : Leakage from the duplexer.
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 : . Which part of the receiver amplifies the electrical signal to a level suitable for further signal processing?
Last Answer : Amplifier.
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 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 : 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 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 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 : What is the control unit's function in the CPU 1) To transfer data to primary storage . 2) TO store program instructions. 3) To perform logic functions. 4) To decode program instructions.
Last Answer : 2) choose Insert, Header and Footer, click Slide tab, select the desired options, click Apply to All
Description : What is the control unit's function in the CPU? a. To transfer data to primary storage b. to store program instruction c. to perform logic operations d. to decode program instruction
Last Answer : b. to store program instruction
Description : What type of flowchart is constructed by the programmer to represent the sequence of operations the computer is to perform to solve a specific problem?
Last Answer : A programming flowchart.
Description : In a general-purpose computer, the ability to perform a wide variety of operations is achieved at the expense of what capabilities?
Last Answer : Speed and efficiency.
Description : . How is a general-purpose computer able to perform different operations?
Last Answer : By storing different programs in its internal storage
Description : A computer that is designed to perform a specific operation and usually satisfies the needs of a particular type of problem, is said to be what type of computer?
Last Answer : Special-purpose.
Description : To perform microminiature component repair, a 2M technician must be currently certified in what area?
Last Answer : Microminiature component repair.
Description : Hard disk drive transports contain the electromechanical parts that perform what three functions?
Last Answer : a. Rotates the hard disk platters. b. Writes data to and reads data from the disk platters
Description : What three things are required to perform magnetic recording
Last Answer : a. An input signal. b. A recording medium. c. A magnetic head.