Nav Equip and Systems - Sync Amps and Repeaters

  1. RF amplifiers used in television receivers usually require a bandwidth of what?
    6 MHz
  2. Which term that describes the size of a signal?
    Amplitude
  3. Which type of device enables an input signal to control an output signal?
    Amplifier
  4. An audio amplifier is designed to amplify frequencies between 15 Hz and what?
    20 kHz
  5. Which operating class is the amplifier if the amplifying device is biased in such a way that current flows in the device for 51% - 99% of the input signal?
    Class AB
  6. What is the process known as of transferring energy between circuits?
    Coupling
  7. What is the most commonly used coupling in amplifiers?
    RC Coupling
  8. What is accomplished by adding part of the output signal in phase with the input signal?
    Positive feedback
  9. What is caused by a small part of the signal from the amplifier output being sent back to the input of the amplifier?
    Oscillation
  10. Which type of device produces two signals that differ in phase from each other from a single input signal?
    Phase splitter
  11. What is the process of sending part of the output signal of an amplifier back to the input of the amplifier called?
    Feedback
  12. What is accomplished by adding part of the output signal out of phase with the input signal?
    Negative feedback
  13. An audio amplifier has been described as an amplifier with a frequency response from 15 Hz to what?
    20 kHz
  14. Which standard block diagram symbol is used for an amplifier?
    Triangle
  15. Which two ways can most amplifiers be classified?
    Function or Frequency response
  16. What is an amplifier in which the output signal voltage is larger than the input signal voltage?
    Voltage amplifier
  17. To meet military specifications, all standard synchros must be capable of continuous operation for 1,000 hours at how many revolutions per minute (rpm) without a load?
    1,200
  18. What is an amplifier in which the output signal power is greater than the input signal power?
    Power amplifier
  19. A video amplifier is an amplifier designed to amplify a band of frequencies from 10 Hz to what
    6 MHz
  20. Which name is given to a variety of rotary, electromechanical, position-sensing devices?
    Synchro
  21. Which type of simple system should the synchro capacitor never be used in?
    Transmitter-receiver
  22. The advent of long-range missiles and high-speed aircraft has brought about the need for accurately transmitting very large quantities. This is best done by what type of synchro system?
    Tri-speed
  23. Which signal lights are used to aid maintenance personnel in locating synchro trouble quickly?
    Trouble indicators
  24. Audio amplifier, RF amplifier, along with what else are the three broad categories of frequency response for amplifiers?
    Video amplifier
  25. RF amplifiers are designed to amplify frequencies between 10 kHz and what?
    100,000 MHz
  26. How many classes of operation for an amplifier are there?
    4
  27. Which type of amplifier has the worst fidelity?
    Class C
  28. Low-speed prestandard synchros must be capable of continuous operation for 1,500 hours at what RPM without a load?
    1,200
  29. How many symbols meet the standard military specifications for schematic diagrams of synchros and synchro connections?
    5
  30. Synchros used in shipboard equipment are designed predominately for how many volts?
    115
  31. Prestandard synchros operate in a range of −13º F to what temperature?
    185º F
  32. When stator voltages are measured, reference is always made to what voltages instead of to a single coil's voltage?
    Terminal-to-terminal
  33. Which class of amplifier has the characteristics of good fidelity and low efficiency?
    Class A
  34. For the AC voltmeter method of zeroing a synchro to be as accurate as possible, an electronic or precision voltmeter having 0- to 250-volt and a 0- to 5-volt ranges should be used. On the low scale this meter should also be able to measure voltages as low as what?
    0.1 volt
  35. Which method is used in synchro receivers to prevent the rotor from oscillating or spinning?
    Damping
  36. How many conditions must exist for a control transformer (CT) to be on electrical zero?
    2
  37. Synchro torque receivers, commonly called synchro receivers, are electrically identical to torque transmitters of the same size except for the addition of some form of what?
    Damping
  38. Which term means that the output signal is just like the input signal in all respects except amplitude?
    Fidelity
  39. Which unit of measurement are torque synchro measurements in?
    Ounce-inches
  40. Synchros are used primarily for the rapid and accurate transmission of what between equipment and stations?
    Information
  41. What is the measurement of work?
    Foot-pounds
  42. How many volts do most aircraft synchros operate on?
    26
  43. What is the most widely used frequency for airborne equipment?
    400 Hz
  44. What is any undesired change in a signal from input to output?
    Distortion
  45. What is a control synchro device accurately governing some type of power amplifying device used for moving heavy equipment?
    Control transformer
  46. Which type of synchros are used in systems that are designed to move heavy loads such as gun directors, radar antennas, and missile launchers?
    Control
  47. Which part of a synchro is a cylindrical structure of slotted laminations on which three Y-connected coils are wound with their axes 120º apart?
    Stator
  48. Which type of amplifier uses two transistors whose output signals are added together to provide a larger gain (usually a power gain) than a single transistor could provide?
    Push-pull
  49. What are the two types of damping methods?
    Electrical and Mechanical
  50. What is a measure of how much load a machine can turn?
    Torque
  51. Standard synchros are designed to withstand surrounding temperatures ranging from −67º F to what at the terminal board?
    +257º F
  52. Which type of transmitter converts the angular position of its rotor (mechanical input) into an electrical output signal?
    Synchro torque
  53. What are the two common types of synchro rotors in use?
    Salient-pole and Drum/Wound
  54. The strength of the magnetic field produced by what determines the torque?
    Stator
  55. What is the angle called through which a transmitter rotor is mechanically rotated?
    Signal
  56. Data that covers a wide range of values are handled very effectively and still maintain a high degree of accuracy in what type of synchro system?
    Multispeed
  57. When a symbol is used on a schematic, it will be accompanied by the military abbreviation of one of how many synchro functional classifications?
    8
  58. Military standard and Navy prestandard synchros are designed to operate on either 115 volts or how many volts?
    26
  59. What is perhaps tile fastest method of zeroing synchros?
    Electrical lock
  60. When large amounts of power and a higher degree of accuracy are required, as in the movement of heavy radar antennas and gun turrets, torque synchro systems give way to the use of what type of synchros?
    Control
  61. What is the reference point for alignment of all synchro units?
    Electrical Zero
  62. What are used primarily for quickly locating a defective synchro?
    Synchro testers
  63. What is a low voltage used in multispeed synchro systems that contain CTs to prevent false synchronizations?
    Stickoff voltage
  64. Which two broad categories can the synchros used in the Navy be grouped into?
    Military standard and Prestandard Navy
  65. Which principle does a synchro run on?
    Electromagnetic induction
  66. What are the two general classifications of synchro systems?
    Torque and Control
  67. Which frequency are syncrhos designed to operate on?
    60 or 400 Hz
  68. Low-speed prestandard synchros must be capable of continuous operation for how many hours at 300 rpm without a load?
    500
  69. The turns ratios in synchros may vary widely, depending upon design and application, but there is commonly a stepdown of what between the rotor and a single coil?
    2.2:1
  70. Which condition exists when both transmitter and receiver rotors in a synchro system are on zero or displaced from zero by the same angle?
    Correspondence
  71. What is necessary to determine the actual position of the synchros rotor?
    Labeling
  72. Which Control Transformer (CT) windings are considered to be the primary windings?
    Stator
  73. What is the most accurate method of zeroing a synchro?
    AC voltmeter
  74. Which rotary electromechanical devices provide outputs that are trigonometric functions of their inputs?
    Resolvers
  75. Generally, there are how many major categories of trouble occurring in synchro systems?
    2
  76. How many basic rules should be applied to synchro maintenance?
    2
  77. How many important factors must be considered to obtain maximum accuracy in a torque system consisting of one transmitter and one receiver?
    2
  78. In a torque system where either a TX or TDX drives several receivers, the accuracy with which each receiver follows the position-data signal applied to its stators is determined by how many factors?
    3
  79. How many sizes of MIL-S-20708 synchros is the clamping disc assembly made for?
    5
  80. What amplifies signals received and then retransmits them back to earth?
    Repeater
  81. What can be used to amplify electrical signals?
    Repeaters
  82. Which equipment is used for taking bearings on objects outside the ship?
    Gyro repeaters
  83. What is the direction of an object from the observer, measured clockwise from the ship's heading as indicated by the lubber's line in the binnacle or the gyro repeater?
    Relative bearing
  84. What is used in conjunction with the ship control console which includes the rudder angle order indicator-transmitter, helm angle indicator, ship's course indicator, course-to-steer indicator, magnetic compass repeater, and emergency steering switch?
    Steering control console
  85. The purpose of a radar indicator (repeater) is to analyze radar system echo return video and to display that information at various remote locations. How many specific inputs from the radar selected must the repeater have to present correct target position data?
    3
Author
Coreyk58
ID
359027
Card Set
Nav Equip and Systems - Sync Amps and Repeaters
Description
Updated