3D153 CDCs

120 Questions | Total Attempts: 207

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3D153 Quizzes & Trivia

Volume 3 URE


Questions and Answers
  • 1. 
    When using space diversity, the AN/TRC 170 receive antenna spacing should be a minium of
    • A. 

      10 wave lenghts

    • B. 

      25 wavelengths

    • C. 

      50 wavelengths

    • D. 

      100 wavelengths

  • 2. 
    Which type of diversity requires 2 antennas, 2 receivers, and 2 transmitters?
    • A. 

      Polarization

    • B. 

      Crossband

    • C. 

      Frequency

    • D. 

      Space

  • 3. 
    In an AN/TRC 170 terminal, the quantity of digital group multiplexer units supplied and their appilication are  
    • A. 

      Different in the V2 and V3

    • B. 

      Identical in the V2 and V3

    • C. 

      Dependent on the mission and number of channels

    • D. 

      Dependent on the deployment of the technical control

  • 4. 
    The MD-1026 digital data modem can interface up to four groups of
    • A. 

      Balanced NRZ signals

    • B. 

      Conditioned diphase signals

    • C. 

      Unbalanced NRZ signals

    • D. 

      Isochronous signals

  • 5. 
    Which type of encryption device does full-duplex encryption of AN/TRC 170's group or super group mission traffic?
    • A. 

      KY-68 digital secure voice terminal/phone

    • B. 

      Ky-58 VINSON

    • C. 

      KG-84 dedicated loop encryption device

    • D. 

      KG-81 trunk encryption device

  • 6. 
    Digital voice order wire traffic that originates at the AN/TRC 170's voice orderwire control unit is encrypted bythe
    • A. 

      KY-68 digital secure voice terminal/phone

    • B. 

      KY-58 VINSON

    • C. 

      KG-84 dedicated loop encryption device

    • D. 

      KG-81 trunk encryption device

  • 7. 
    Which jack field in the AN/TRC-170's baseband patch provides timing and data connections?
    • A. 

      Middle

    • B. 

      Center

    • C. 

      Upper

    • D. 

      Lower

  • 8. 
    The tropospheric scatter modem posses mission traffic at data rates of 128 through 4096 Kbps in the
    • A. 

      512 Kbps data rate family

    • B. 

      576 Kbps data rate family

    • C. 

      1024 Kbps data rate family

    • D. 

      1152 Kbps data rate family

  • 9. 
    Which unit in the AN/TRC 170 terminal contains the rubidium standard?
    • A. 

      Electrical frequency synthesizer

    • B. 

      Frequency subsytem unit

    • C. 

      Tropospheric scatter modem

    • D. 

      Transmitter-ampilifier converter

  • 10. 
    The quick reaction antenna for the V3 AN/TRC 170 terminal uses
    • A. 

      two 6-foot-diameter, linearly dual-polarized antennas

    • B. 

      Four 6-foot-diameter, linearly dual-polarized antennas

    • C. 

      Two 9.5 foot-diameter, linearly dual polarized antennas

    • D. 

      Four 9.5 foot-diameter, linearly dual polarized antennas

  • 11. 
    The TSSR frequency coverage extends from
    • A. 

      4.4 to 5.25 GHz

    • B. 

      7.25 to 8.4 GHz

    • C. 

      14.4 to 15.25 GHz

    • D. 

      17.25 to 18.4 GHz

  • 12. 
    The maximum distance a TSSR can operate with a 2-foot antenna is
    • A. 

      10 miles

    • B. 

      25 miles

    • C. 

      100 miles

    • D. 

      250 miles

  • 13. 
    In the TSSR's baseband assembly, a 1 VPP input signal results in how much frequency deviation in the transmitter?
    • A. 

      +/- 4MHz

    • B. 

      Les than +/- 4MHz

    • C. 

      More than +/- 4MHz

    • D. 

      No signal deviation

  • 14. 
    What is the IF of the TSSR?
    • A. 

      70 MHz with a 10 MHz banpass

    • B. 

      70 MHz with a 20 MHz bandpass

    • C. 

      700 MHz with a 10 MHz banpass

    • D. 

      700 MHzwith a 20 MHz bandpass

  • 15. 
    In the TSSR assembly what permits the transmitter and receiver to be connected to the same antenna?
    • A. 

      Circulator

    • B. 

      Combiner

    • C. 

      Coupler

    • D. 

      Hybrid

  • 16. 
    The closest point of orbit that a satellite comes to the Earth is called the
    • A. 

      Apogee

    • B. 

      Perigee

    • C. 

      Major axis

    • D. 

      Minor axis

  • 17. 
    What is th einclination angle of a polar orbit?
    • A. 

      0 degrees

    • B. 

      45 degrees

    • C. 

      90 degrees

    • D. 

      180 degrees

  • 18. 
    What are the two types of communication satellites?
    • A. 

      Active and passive

    • B. 

      Active and real-time

    • C. 

      Delay and passive

    • D. 

      Delay and real-time

  • 19. 
    An advantage of passive satellites is that they
    • A. 

      Have a larger transmitter power

    • B. 

      Have more sensitive equipment

    • C. 

      Operate as repeater staions in space

    • D. 

      Operate over a wider-frequency range

  • 20. 
    what is the time delay of a real-time satellite?
    • A. 

      0.1 seconds

    • B. 

      0.6 seconds

    • C. 

      1.0 seconds

    • D. 

      6.0 seconds

  • 21. 
    Which satellites reflects signal transmitted toward it?
    • A. 

      Active

    • B. 

      Delay

    • C. 

      Passive

    • D. 

      Real-time

  • 22. 
    What satellite acces technique was the first mutiple acces method developed?
    • A. 

      Code division mutiple acces

    • B. 

      Time division mutiple acces

    • C. 

      Frequency mutiple acces

    • D. 

      Demand assigned mutiple acces

  • 23. 
    What satellite access technique is being used when all channels are pooled and used by any station, according to its instantaneous traffic load?
    • A. 

      CDMA

    • B. 

      TDMA

    • C. 

      DAMA

    • D. 

      FDMA

  • 24. 
    When computing satellite look angles, ground distance on eath's surface is expressed in
    • A. 

      Degrees

    • B. 

      Seconds

    • C. 

      Minutes

    • D. 

      Nautical miles

  • 25. 
    1of an arc on the Earth's surface equals
    • A. 

      One nautical mile

    • B. 

      69 statute miles

    • C. 

      One statute mile

    • D. 

      69 nautical miles