3D1X3 CDC Volume 3 Ure

120 Questions | Total Attempts: 1105

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3d1x3 Quizzes & Trivia

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

      10 wavelengths apart.

    • B. 

      25 wavelengths apart.

    • C. 

      50 wavelengths apart.

    • D. 

      100 wavelengths apart.

  • 2. 
    (401)  Which type of diversity requires two antennas, two receivers, and two transmitters?
    • A. 

      Polarization.

    • B. 

      Crossband.

    • C. 

      Frequency.

    • D. 

      Space.

  • 3. 
    (401)  In an AN/TRC-170 terminal, the quantity of digital group multiplexer units supplied and their application are
    • A. 

      Different in the V2 and V3 systems.

    • B. 

      Identical in the V2 and V3 systems.

    • C. 

      Dependent on the mission and number of channels.

    • D. 

      Dependent on the deployment of the technical control.

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

      Balanced non-return-to-zero (NRZ) signals.

    • B. 

      Conditioned diphase signals.

    • C. 

      Unbalanced NRZ signals.

    • D. 

      Isochronous signals.

  • 5. 
    (401)  Which type of encryption device does full-duplex encryption of AN/TRC-170's groups or supergroup 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. 
    (401)  Digital voice orderwire traffic that originates at the AN/TRC-170's voice orderwire control unit is encrypted by the
    • A. 

      KY-68 digital secure voice terminal/phone.

    • B. 

      KY-58 VINSON encryption device.

    • C. 

      KG-84 dedicated loop encryption device.

    • D. 

      KG-81 trunk encryption device.

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

      Middle.

    • B. 

      Center.

    • C. 

      Upper.

    • D. 

      Lower.

  • 8. 
    (401)  The tropospheric scatter modem processes mission traffic at data rates of 128 through 4,096 Kbps in the
    • A. 

      512 Kbps data rate family.

    • B. 

      576 Kbps data rate family.

    • C. 

      1,024 Kbps data rate family.

    • D. 

      1,152 Kbps data rate family.

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

      Electrical frequency synthesizer.

    • B. 

      Frequency subsystem unit.

    • C. 

      Tropospheric scatter modem.

    • D. 

      Transmitter-amplifier converter.

  • 10. 
    (401)  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. 
    (402)  The Tropo/Satellite Support Radio 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. 
    (402)  The maximum distance a Tropo/Satellite Support Radio can operate with the 2-foot antenna is
    • A. 

      10 miles.

    • B. 

      25 miles.

    • C. 

      100 miles.

    • D. 

      250 miles.

  • 13. 
    (402)  In the Tropo/Satellite Support Radio's baseband assembly, a 1-volt peak-to-peak input signal results in how much frequency deviation in the transmitter?
    • A. 

      +/- 4 MHz.

    • B. 

      Less than +/- 4 MHz.

    • C. 

      More than +/- 4 MHz.

    • D. 

      No signal deviation.

  • 14. 
    (402)  In the Tropo/Satellite Support Radio frequency assembly, what permits the transmitter and receiver to be connected to the same antenna?
    • A. 

      Circulator.

    • B. 

      Combiner.

    • C. 

      Coupler.

    • D. 

      Hybrid.

  • 15. 
    (402)  What is the intermediate frequency of the Tropo/Satellite Support Radio?
    • A. 

      70 MHz with a 10 MHz bandpass.

    • B. 

      70 MHz with a 20 MHz bandpass.

    • C. 

      700 MHz with a 10 MHz bandpass.

    • D. 

      700 MHz with a 20 MHz bandpass.

  • 16. 
    (403)  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. 
    (403)  What is the inclination angle of a polar orbit?
    • A. 

      0 degrees.

    • B. 

      45 degrees.

    • C. 

      90 degrees.

    • D. 

      180 degrees

  • 18. 
    (404)  What are the two types of communications satellites?
    • A. 

      Active and passive.

    • B. 

      Active and real-time.

    • C. 

      Delay and passive.

    • D. 

      Delay and real-time.

  • 19. 
    (404)  Which satellite reflects signals transmitted toward it?
    • A. 

      Active.

    • B. 

      Delay.

    • C. 

      Passive.

    • D. 

      Real-time.

  • 20. 
    (404)  An advantage of passive satellites is that they
    • A. 

      Have a larger transmitter power.

    • B. 

      Have more sensitive equipment.

    • C. 

      Operate as repeater stations in space.

    • D. 

      Operate over a wider-frequency range.

  • 21. 
    (404)  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.

  • 22. 
    (405)  What satellite access technique was the first multiple access method developed?
    • A. 

      Code division multiple access (CDMA).

    • B. 

      Time division multiple access (TDMA).

    • C. 

      Demand assigned multiple access (DAMA).

    • D. 

      Frequency division multiple access (FDMA).

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

      Code division multiple access (CDMA).

    • B. 

      Time division multiple access (TDMA).

    • C. 

      Demand assigned multiple access (DAMA).

    • D. 

      Frequency division multiple access (FDMA).

  • 24. 
    (406)  When computing satellite look angles, ground distance on the earth's surface is expressed in
    • A. 

      Degrees.

    • B. 

      Seconds.

    • C. 

      Minutes.

    • D. 

      Nautical miles.

  • 25. 
    (406)  One degree of arc on the Earth's surface equals
    • A. 

      One statute mile.

    • B. 

      One nautical mile.

    • C. 

      69 statute miles.

    • D. 

      69 nautical miles.

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