3d1x5 Volume 2 (Ure)

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1. Radio frequency (RF) to the antenna makes the transition from fixed to rotating waveguide within the
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CDC Quizzes & Trivia

Volume 2 for 3D1X5 CDCs

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2. Siting a precision approach radar (PAR) for multiple runway approaches can cause you to locate the unit outside the optimum coverage areas. If this occurs what would be the best location for the radar system?
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3. What identifies and blanks returns from targets beyond the operating range of the radar?
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4. Once a track is established in the AN/GPN–22 precision approach radar (PAR), what device uses error data obtained from the received signal to predict where the target will be during the next track interval?
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5. In the AN/GPN–22 precision approach radar (PAR), the non-coherent mode of operation is used to
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6. What capability makes the traveling wave tube (TWT) much more versatile than the magnetron?
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7. What is used to regulate the output of the AN/GPN–20 airport surveillance radar (ASR) transmitter's high voltage power supply?
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8. In the dual redundant receiver of the AN/GPN–22 precision approach radar (PAR), which of the following best describes the fault hierarchy for the automatic fault testing?
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9. The airport surveillance radar (ASR) is used in which air traffic control (ATC) radar mission?
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10. On the AN/GPN–22 precision approach radar (PAR) radar set controls (RSC), an "OVER TEMP" fault lamp indicates
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11. All of the front panel switches in the special test section of the dual redundant receiver of the AN/GPN–22 precision approach radar (PAR) are disabled during normal operation except for the
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12. In the AN/GPN–22 precision approach radar (PAR) system, frequency diversity is accomplished by transmitting two 1 microsecond (μsec) pulses that are composed of two X-band frequencies separated by
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13. At what interval does the AN/GPN–22 precision approach radar's (PAR) target data computer (TDC) perform system fault monitoring?
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14. In the AN/GPN–22 precision approach radar (PAR), the data loop interface logic circuitry used in each of the subsystems is commonly called
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15. The primary function of the refresh memory (RM) in the precision approach radar (PAR) indicator system is to
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16. The AN/GPN–20 airport surveillance radar (ASR) provides emergency obstruction light operation for a minimum of
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17. The time necessary to quickly disconnect the transmitter and connect the receiver to the antenna is called
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18. How will the final optimum tilt angle for the AN/GPN–20 airport surveillance radar (ASR) antenna be determined?
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19. In the AN/GPN–22 precision approach radar (PAR), what are the three modes of operation with respect to data loop operation?
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20. What is the primary advantage of having two operator keyboards for each control indicator group?
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21. The AN/GPN–22 precision approach radar (PAR) required input voltage is 3-phase,
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22. What receiver parameter does minimum discernable signal (MDS) check?
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23. In the AN/GPN–22 precision approach radar (PAR), the stabilized master oscillator (STAMO) multiplies the continuous wave (CW) transmitter drive signal to the
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24. In the scan mode, the AN/GPN–22 precision approach radar (PAR) can direct the radio frequency (RF) beam to how many separate beam positions?
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25. The target data computer in the AN/GPN–22 precision approach radar (PAR) processes the site parameter panel data once
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26. What is a measure of the ability to detect a small moving target in ground clutter?
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27. For how many minutes is the AN/GPN–20 airport surveillance radar (ASR) control memory energized by the temporary power supply when a power failure occurs?
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28. The AN/GPN–20 airport surveillance radar (ASR) primary power input is 3-phase,
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29. Azimuth resolution is directly related to what radar set characteristic?
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30. The point designated as touchdown for a precision approach radar (PAR) is normally how many feet from the end of the runway?
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31. In dual frequency diversity mode, the overall AN/GPN–20 airport surveillance radar (ASR) system timing is derived from the
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32. Which converter is used in both the AN/GPN–22 precision approach radar (PAR) shelter and radar approach control (RAPCON) remoting equipment to convert the parallel 32-bit data words to serial data and back again?
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33. To change the AN/GPN–20 airport surveillance radar (ASR) receiver stable local oscillator (STALO) frequency you must
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34. The airport surveillance radar transmitter site should be located more than ½ mile from the primary instrument approach path and touch-down point so that these areas
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35. After initial turn-on, what is the recommended warm-up period for the AN/UPM–145 Radar Test Set before performing any tests?
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36. The purpose of the traveling wave tube (TWT) radar modulator A6 in the AN/GPN–22 precision approach radar (PAR) transmitter is to
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37. In the programmable indicator data processor (PIDP) II, what service does the low-altitude alerting system perform?
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38. What effectively eliminates moving target indicator (MTI) blind speeds at the speeds seen in air traffic control?
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39. Blind speed is a target speed at which successive radar returns changes phase by
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40. In the AN/GPN–22 precision approach radar (PAR) remoting system, which channel is not remoted to the radar unit?
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41. In remoting signals, line attenuation is greatest at the
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42. How many narrow band filters does the AN/GPN–22 precision approach radar (PAR) employ to convert a shift in intermediate frequency (IF) to a range error signal?
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43. AN/GPN–22 precision approach radar (PAR) emergency power is supplied by a
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44. What is the original source of the continuous wave (CW) radio frequency (RF) drive in the AN/GPN–22 precision approach radar (PAR)?
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45. When off-line is selected on the digital bright radar indicator tower equipment's (DBRITE) digital scan converter (DSC) control panel, what mode is available for presentation?
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46. Which of the following is an off-line test performed on the antenna position control unit (APCU) in the AN/GPN–22 precision approach radar (PAR)?
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47. The AN/GPN–22 precision approach radar's (PAR) transmit/receive (T/R) section
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48. In single cancellation, what happens to the pulse train after it is time-aligned with the next range scan?
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49. The output voltage adjustment for the AN/GPN–20 airport surveillance radar (ASR) high voltage power supply is located
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50. A diplexer enables the use of two
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51. A phase detector that produces a large change in output voltage for a small change in input signal phase will
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52. In the AN/GPN–22 precision approach radar (PAR) system, frequency diversity is used in the scan mode to eliminate
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53. In the AN/GPN–20 airport surveillance radar (ASR) video processor, either log or normal video is selected for input in to the moving target indicator (MTI)/normal enhancer circuit by the
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54. What type of information does selective identification feature (SIF) Mode C reply represent?
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55. Which switch on the AN/TPX–42A interrogator set control (B-box) determines how long the video signal processor (VSP) is allowed to process video?
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56. In the event of a power loss the uninterruptible power supply is capable of operating the entire programmable indicator data processor (PIDP) II OL–475 equipment rack for period of how many minutes?
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57. The most common method of modulation used in remoting is
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58. In the remoting section of the AN/GPN–22 precision approach radar (PAR), what is the purpose of the line driver equalizer circuits?
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59. What should be the basis for adjusting the intermediate frequency (IF) gain in the AN/GPN–20 airport surveillance radar (ASR)?
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60. The precision approach radar (PAR) indicator system indicates an aircraft's
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61. In the AN/GPN–22 precision approach radar (PAR), the coherent and non-coherent input to the moving target indictor (MTI) detector is outputted as
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62. In the precision approach radar (PAR) indicator the top presents elevation versus
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63. What AN/TPX–42A air traffic control identification friend or foe/selective identification feature (IFF/SIF) component generates mode interrogation triggers?
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64. The AN/GPN–20 airport surveillance radar's (ASR) normal intermediate frequency (IF) amplifier provides IF
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65. What AN/GPN–20 airport surveillance radar (ASR) meter is a good indicator of the transmitter output power?
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66. What is the ideal horizontal beam width for the AN/GPN–20 airport surveillance radar (ASR) antenna at the half power point?
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67. A passive feedhorn is used to achieve greater control over
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68. The precision approach radar (PAR) indicator system displays the decision height cursor
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69. The maximum amount of landline allowed between the AN/GPN–20 airport surveillance radar (ASR) and operations sites is
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70. One of the functions of the AN/TPX–42A line-compensator assembly is to
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71. On the OD–153 airport surveillance radar (ASR) indicator display, the identification position (I/P) or special position identifier (SPI) target symbol may be best described as a
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72. As the range increases, the sensitivity time control (STC) attenuation in the AN/GPN–22 precision approach radar (PAR) is stepped down in what increments?
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73. Most moving target indicator (MTI) phase detectors are designed to develop a
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74. In the AN/GPN–22 precision approach radar (PAR), the operational program is locked to the real-time radar operations by the interrupt command signal from the
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75. The master timing signal in the AN/GPN–20 airport surveillance radar (ASR) video processor, establishes the basic radar-timing period (range cell) of
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76. What function of the programmable indicator data processor (PIDP) II alerts the controller should the selected tracked targets deviate greater than ±300 feet from the controller assigned or current altitude?
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77. The AN/GPN–20 airport surveillance radar (ASR) preamplifiers are designed for stability at the
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78. What circuit in the AN/GPN–20 airport surveillance radar (ASR) video processor converts bipolar analog video into a digital form?
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79. In the AN/TPX–42A video signal processor, what is the name of the new azimuth computed between the on-target (OT) and end-of-target (EOT) azimuths?
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80. How many radar scans does double cancellation require?
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81. Which multiplexing process is used when we combine five different channels into one common channel?
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82. When the horizontal plane of the transmitted beam of an airport surveillance radar (ASR) is on a target for less time, the
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83. The reply buffer used with the AN/TPX–42A video signal processor (VSP) memory unit can hold up to how many reply messages per pulse recurrence time (PRT)?
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84. To maintain synchronization with air route traffic control center (ARTCC) equipment, an interfacility communications adapter (ICA) at idle
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85. When the system computer is disengaged, the OD–153 airport surveillance radar (ASR) indicator operates as
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86. Which component consists of two radio frequency (RF) filters?
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87. The AN/GPN–20 airport surveillance radar's (ASR) log amplifier is a nonlinear device that
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88. How does turning the AN/TPX–42A's gain time control (GTC) switch, on the front panel of the interrogator/receiver (I/R) unit, from OFF to ON affect the receiver's gain?
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89. What device is used to specify a screen location to off center the sweep origin of an OD– 153 indicator?
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90. If the programmable indicator data processor (PIDP) II operation program detects a data transmission error from an air route traffic control center (ARTCC), the message is
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91. The precision approach radar (PAR) indicator system displays the reference reflector
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92. When using the AN/UPM–145 Radar Test Set, you must reduce the input with attenuators if input power exceeds
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93. On the interrogator set control (B-box), if the TARGET LOAD indicator comes on, it's indicating that the programmable indicator data processor (PIDP) II is processing more than
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94. In the AN/GPN–22 precision approach radar (PAR) remoting system, what two types of modulation does the analog data undergo?
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95. What AN/GPN–22 precision approach radar (PAR) remoting channel is multiplexed but does not modulate a subcarrier, since the frequency range of the information makes it suitable for direct transmission?
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96. The AN/UPM–145 output frequency can be adjusted between
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97. In the AN/GPN–20 airport surveillance radar (ASR), at what limit from center frequency does the automatic frequency control (AFC) circuitry stop tuning and shut off the transmitter high voltage?
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98. In a 2-line character block on the OD–153 airport surveillance radar (ASR) indicator, the second line consists of three decimal digits representing
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99. On the digital scan converter (DSC) control panel of the digital bright radar indicator tower equipment's (DBRITE), the off-line built-in test (BIT) is disabled by setting the
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100. Which AN/GPN–22 precision approach radar (PAR) dual-redundant receiver module performs the filtering, limiting, phase detection, analog-to-digital (A/D) conversion, decommutation, and integration of the azimuth and elevation signals?
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101. What type of multiplexing is used in the closure, analog, digital, and video/trigger/data channels of the AN/GPN–22 precision approach radar (PAR)?
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102. In the AN/TPX–42A's range azimuth beacon monitor (RABM), which device isolates the receiver input from the transmitter output?
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103. In the programmable indicator data processor (PIDP) II display interface, how often does a sector interrupt occur?
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104. In the AN/TPX–42A transfer switching drawer assembly (TSDA), the amplitude normalizer circuits limit inputs to how many volts before routing the signals to other circuits?
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105. What component in the AN/TPX–42A video signal processor monitors for the possible interference condition called garble?
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106. In the AN/GPN–22 precision approach radar (PAR), what is the output of the signal data converter (SDC) to the indicator group?
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107. The point at which sensitivity time control (STC) wave shape ends is the
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108. In the AN/GPN–20 airport surveillance radar (ASR) transmitter, what causes the magnetron to oscillate?
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109. What is the total number of automatic alignment procedures to be performed by the timing generator during dead time in the AN/GPN–22 precision approach radar (PAR)?
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110. Antilog circuits may be used to reduce the gain of
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111. In the AN/TPX–42A, which trigger is used to develop the interrogator side lobe suppression (ISLS) switching trigger?
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112. In the AN/GPN–22 precision approach radar's (PAR) signal data converter (SDC), what permits the comparison of echoes from three radar receive periods?
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113. What function of AN/GPN–20 airport surveillance radar (ASR) range azimuth gating (RAG) is used to indicate runway, air route, or approach pattern?
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114. What is the frequency of the transmitted output signal from the range azimuth beacon monitor (RABM)?
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115. An interrogator side-lobe suppression (ISLS) diplexer is used in lieu of an ISLS switch when the radar system has
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116. In the AN/GPN–22 precision approach radar (PAR), how many scan periods are required to perform video integration in the signal data converter (SDC)?
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117. Which boards are in digital bright radar indicator tower equipment's (DBRITE) digital scan converter (DSC)?
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118. The type of remote control unit (RCU) used with the digital bright radar indicator tower equipment's (DBRITE) is determined by the
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119. What is the maximum number of digital bright radar indicator tower equipment's (DBRITE) display units that can be driven by a digital scan converter (DSC)?
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120. In the digital bright radar indicator tower equipment's (DBRITE) system, when a built-in test (BIT) function detects a circuit failure, an error code that corresponds to the failure is shown on
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121. Where are the modulated subcarriers that represent the various types of inputs to the AN/GPN–22 precision approach radar (PAR) remoting circuits summed?
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122. In the AN/GPN–20 airport surveillance radar (ASR), what two signals are mixed in the automatic frequency control (AFC) mixer to produce a signal representative of the difference between the magnetron and stable local oscillator (STALO) frequency?
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123. In the programmable indicator data processor (PIDP) II display interface, what message causes the display to update the targets in its memory so that a wedge follows the sweep around the cathode ray tube (CRT)?
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124. The phase of the AN/GPN–20 airport surveillance radar's (ASR) locked coherent oscillator (COHO) signal is determined by the
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Radio frequency (RF) to the antenna makes the transition from fixed to...
Siting a precision approach radar (PAR) for multiple runway approaches...
What identifies and blanks returns from targets beyond the operating...
Once a track is established in the AN/GPN–22 precision approach...
In the AN/GPN–22 precision approach radar (PAR), the...
What capability makes the traveling wave tube (TWT) much more...
What is used to regulate the output of the AN/GPN–20 airport...
In the dual redundant receiver of the AN/GPN–22 precision...
The airport surveillance radar (ASR) is used in which air traffic...
On the AN/GPN–22 precision approach radar (PAR) radar set...
All of the front panel switches in the special test section of the...
In the AN/GPN–22 precision approach radar (PAR) system,...
At what interval does the AN/GPN–22 precision approach radar's...
In the AN/GPN–22 precision approach radar (PAR), the data loop...
The primary function of the refresh memory (RM) in the precision...
The AN/GPN–20 airport surveillance radar (ASR) provides...
The time necessary to quickly disconnect the transmitter and connect...
How will the final optimum tilt angle for the AN/GPN–20 airport...
In the AN/GPN–22 precision approach radar (PAR), what are the...
What is the primary advantage of having two operator keyboards for...
The AN/GPN–22 precision approach radar (PAR) required input...
What receiver parameter does minimum discernable signal (MDS) check?
In the AN/GPN–22 precision approach radar (PAR), the stabilized...
In the scan mode, the AN/GPN–22 precision approach radar (PAR)...
The target data computer in the AN/GPN–22 precision approach...
What is a measure of the ability to detect a small moving target in...
For how many minutes is the AN/GPN–20 airport surveillance radar...
The AN/GPN–20 airport surveillance radar (ASR) primary power...
Azimuth resolution is directly related to what radar set...
The point designated as touchdown for a precision approach radar (PAR)...
In dual frequency diversity mode, the overall AN/GPN–20 airport...
Which converter is used in both the AN/GPN–22 precision approach...
To change the AN/GPN–20 airport surveillance radar (ASR)...
The airport surveillance radar transmitter site should be located more...
After initial turn-on, what is the recommended warm-up period for the...
The purpose of the traveling wave tube (TWT) radar modulator A6 in the...
In the programmable indicator data processor (PIDP) II, what service...
What effectively eliminates moving target indicator (MTI) blind speeds...
Blind speed is a target speed at which successive radar returns...
In the AN/GPN–22 precision approach radar (PAR) remoting system,...
In remoting signals, line attenuation is greatest at the
How many narrow band filters does the AN/GPN–22 precision...
AN/GPN–22 precision approach radar (PAR) emergency power is...
What is the original source of the continuous wave (CW) radio...
When off-line is selected on the digital bright radar indicator tower...
Which of the following is an off-line test performed on the antenna...
The AN/GPN–22 precision approach radar's (PAR) transmit/receive...
In single cancellation, what happens to the pulse train after it is...
The output voltage adjustment for the AN/GPN–20 airport...
A diplexer enables the use of two
A phase detector that produces a large change in output voltage for a...
In the AN/GPN–22 precision approach radar (PAR) system,...
In the AN/GPN–20 airport surveillance radar (ASR) video...
What type of information does selective identification feature (SIF)...
Which switch on the AN/TPX–42A interrogator set control (B-box)...
In the event of a power loss the uninterruptible power supply is...
The most common method of modulation used in remoting is
In the remoting section of the AN/GPN–22 precision approach...
What should be the basis for adjusting the intermediate frequency (IF)...
The precision approach radar (PAR) indicator system indicates an...
In the AN/GPN–22 precision approach radar (PAR), the coherent...
In the precision approach radar (PAR) indicator the top presents...
What AN/TPX–42A air traffic control identification friend or...
The AN/GPN–20 airport surveillance radar's (ASR) normal...
What AN/GPN–20 airport surveillance radar (ASR) meter is a good...
What is the ideal horizontal beam width for the AN/GPN–20...
A passive feedhorn is used to achieve greater control over
The precision approach radar (PAR) indicator system displays the...
The maximum amount of landline allowed between the AN/GPN–20...
One of the functions of the AN/TPX–42A line-compensator assembly...
On the OD–153 airport surveillance radar (ASR) indicator...
As the range increases, the sensitivity time control (STC) attenuation...
Most moving target indicator (MTI) phase detectors are designed to...
In the AN/GPN–22 precision approach radar (PAR), the operational...
The master timing signal in the AN/GPN–20 airport surveillance...
What function of the programmable indicator data processor (PIDP) II...
The AN/GPN–20 airport surveillance radar (ASR) preamplifiers are...
What circuit in the AN/GPN–20 airport surveillance radar (ASR)...
In the AN/TPX–42A video signal processor, what is the name of...
How many radar scans does double cancellation require?
Which multiplexing process is used when we combine five different...
When the horizontal plane of the transmitted beam of an airport...
The reply buffer used with the AN/TPX–42A video signal processor...
To maintain synchronization with air route traffic control center...
When the system computer is disengaged, the OD–153 airport...
Which component consists of two radio frequency (RF) filters?
The AN/GPN–20 airport surveillance radar's (ASR) log amplifier...
How does turning the AN/TPX–42A's gain time control (GTC)...
What device is used to specify a screen location to off center the...
If the programmable indicator data processor (PIDP) II operation...
The precision approach radar (PAR) indicator system displays the...
When using the AN/UPM–145 Radar Test Set, you must reduce the...
On the interrogator set control (B-box), if the TARGET LOAD indicator...
In the AN/GPN–22 precision approach radar (PAR) remoting system,...
What AN/GPN–22 precision approach radar (PAR) remoting channel...
The AN/UPM–145 output frequency can be adjusted between
In the AN/GPN–20 airport surveillance radar (ASR), at what limit...
In a 2-line character block on the OD–153 airport surveillance...
On the digital scan converter (DSC) control panel of the digital...
Which AN/GPN–22 precision approach radar (PAR) dual-redundant...
What type of multiplexing is used in the closure, analog, digital, and...
In the AN/TPX–42A's range azimuth beacon monitor (RABM), which...
In the programmable indicator data processor (PIDP) II display...
In the AN/TPX–42A transfer switching drawer assembly (TSDA), the...
What component in the AN/TPX–42A video signal processor monitors...
In the AN/GPN–22 precision approach radar (PAR), what is the...
The point at which sensitivity time control (STC) wave shape ends is...
In the AN/GPN–20 airport surveillance radar (ASR) transmitter,...
What is the total number of automatic alignment procedures to be...
Antilog circuits may be used to reduce the gain of
In the AN/TPX–42A, which trigger is used to develop the...
In the AN/GPN–22 precision approach radar's (PAR) signal data...
What function of AN/GPN–20 airport surveillance radar (ASR)...
What is the frequency of the transmitted output signal from the range...
An interrogator side-lobe suppression (ISLS) diplexer is used in lieu...
In the AN/GPN–22 precision approach radar (PAR), how many scan...
Which boards are in digital bright radar indicator tower equipment's...
The type of remote control unit (RCU) used with the digital bright...
What is the maximum number of digital bright radar indicator tower...
In the digital bright radar indicator tower equipment's (DBRITE)...
Where are the modulated subcarriers that represent the various types...
In the AN/GPN–20 airport surveillance radar (ASR), what two...
In the programmable indicator data processor (PIDP) II display...
The phase of the AN/GPN–20 airport surveillance radar's (ASR)...
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