3D153 CDCs
Volume 3 URE
- 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
Correct Answer
C. 50 wavelengths -
- 2.
Which type of diversity requires 2 antennas, 2 receivers, and 2 transmitters?
- A.
Polarization
- B.
Crossband
- C.
Frequency
- D.
Space
Correct Answer
A. Polarization -
- 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
Correct Answer
B. Identical in the V2 and V3 -
- 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
Correct Answer
B. Conditioned diphase 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
Correct Answer
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
Correct Answer
B. KY-58 VINSON -
- 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
Correct Answer
C. Upper -
- 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
Correct Answer
A. 512 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
Correct Answer
C. Tropospheric scatter modem -
- 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
Correct Answer
A. two 6-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
Correct Answer
C. 14.4 to 15.25 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
Correct Answer
B. 25 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
Correct Answer
A. +/- 4MHz -
- 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
Correct Answer
B. 70 MHz with 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
Correct Answer
A. Circulator -
- 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
Correct Answer
B. Perigee -
- 17.
What is th einclination angle of a polar orbit?
- A.
0 degrees
- B.
45 degrees
- C.
90 degrees
- D.
180 degrees
Correct Answer
C. 90 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
Correct Answer
A. Active and passive -
- 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
Correct Answer
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
Correct Answer
B. 0.6 seconds -
- 21.
Which satellites reflects signal transmitted toward it?
- A.
Active
- B.
Delay
- C.
Passive
- D.
Real-time
Correct Answer
C. Passive -
- 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
Correct Answer
C. Frequency 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
Correct Answer
C. DAMA -
- 24.
When computing satellite look angles, ground distance on eath's surface is expressed in
- A.
Degrees
- B.
Seconds
- C.
Minutes
- D.
Nautical miles
Correct Answer
A. Degrees -
- 25.
10 of an arc on the Earth's surface equals
- A.
One nautical mile
- B.
69 statute miles
- C.
One statute mile
- D.
69 nautical miles
Correct Answer
B. 69 statute miles -
- 26.
Soalr time is based on
- A.
Atomic clock oscillators
- B.
Apparent constellation movement
- C.
The moon's rotation about the sun
- D.
Tha apparent motion of the sun in the sky
Correct Answer
D. Tha apparent motion of the sun in the sky -
- 27.
An atomic time scale is based on the frequency of which type of oscillator?
- A.
Pendulum
- B.
Crystal
- C.
Quartz
- D.
Cesium
Correct Answer
D. Cesium -
- 28.
On what kind of clock system is coordinated universal time based on?
- A.
Daylight saving
- B.
24-hr
- C.
12-hr
- D.
Amplitude modulation and pulse modulation
Correct Answer
B. 24-hr -
- 29.
The international agency responsible for coordinated universal time is the
- A.
United State Naval Observatory
- B.
Internation Bureau of Weights and Measures
- C.
Precision Measurement Equipment Lab
- D.
National Institute of Standards and Technology
Correct Answer
B. Internation Bureau of Weights and Measures -
- 30.
Uploading satellite control data, tracking ballistic missiles, and predicting satellite tracking coordinates are examples of missions where all parties are involved must have
- A.
Identical time code formats
- B.
Different time code formats
- C.
Synchronized timing
- D.
Offset timing
Correct Answer
C. Synchronized timing -
- 31.
What two factors cause a quartz oscillator's resonant frequency to drift?
- A.
Humidity and aging
- B.
Temperature and aging
- C.
Humidity and operating frequency
- D.
Temperature and operating frequency
Correct Answer
B. Temperature and aging -
- 32.
The operation of the atomic clock is based on the phenomenon that
- A.
Crystals resonate when an electric charge is applied
- B.
Atoms release energy at a particular resonant frequency
- C.
Atoms are sensitive to temperature and directional effects
- D.
When atoms are spit they produce a predictable nuclear reaction
Correct Answer
B. Atoms release energy at a particular resonant frequency -
- 33.
Which type of modems transmit RF signals over coaxial cable?
- A.
Voice
- B.
Cable
- C.
Radio
- D.
Wireless
Correct Answer
B. Cable -
- 34.
What is multiplexing?
- A.
Transmitting one signal over multiple transmission paths
- B.
Transmitting one signal multiple times over a single transmission path
- C.
Combining mutiple signals over a single transmission path
- D.
Combining multiple signals over seperate transmissions paths
Correct Answer
C. Combining mutiple signals over a single transmission path -
- 35.
What technique of multiplexing samples each low speed channle in sequence to interleave bits or characters and then transmit them at a high speed?
- A.
Wavelength division
- B.
Frequency division
- C.
Code division
- D.
Time division
Correct Answer
D. Time division -
- 36.
Wavelength division multiplexing assigns each incoming optical signal to a specific
- A.
Pseudorandom code
- B.
Frequency light
- C.
Radio frequency
- D.
Time slot
Correct Answer
B. Frequency light -
- 37.
What comprises a telemtry data stream?
- A.
Mission data and mission satellite health status data
- B.
Command data and mission satellite health and status data
- C.
Mission data, satellite ephemeris table, and satellite status data
Correct Answer
A. Mission data and mission satellite health status data -
- 38.
On a satellite, position and oreintation control is especially critical for what type if antenna?
- A.
Broadband
- B.
Wide angle
- C.
High frequency
- D.
Highly directional
Correct Answer
D. Highly directional -
- 39.
The function of command and control segment of the space system is to
- A.
Provide downlink information and recover the payload health and status data
- B.
Maintain the satellite health and status and recover the payload and health and status data
- C.
Maintain the satellite health and status and recover the area coverage required by the program mission
Correct Answer
B. Maintain the satellite health and status and recover the payload and health and status data -
- 40.
What type of command is sent to the satellite by the space mission control complex and contains embedded timing that specifies the time the satellite wil execute the command?
- A.
Real-time
- B.
Time-delayed
- C.
Timed program
- D.
Stored program
Correct Answer
D. Stored program -
- 41.
What is the purpose of the space system user segment?
- A.
Receive, process, use, or distribute mission data as required by a program's tasking
- B.
Receive, process, use, or distribute payload data and provide essential space support tasks as required by a program's taskings
- C.
Transmit, process, use, or distribute mission data as required by a program's tasking
- D.
Transmit, process, use, or distribute payload data and provide essential space support tasks as required by a program's taskings
Correct Answer
A. Receive, process, use, or distribute mission data as required by a program's tasking -
- 42.
The two major subdivisions of the defense Meteorological Satellite Program user segment are
- A.
Air Force weather Agency and Fleet Numerical Meteorology Oceanography Center and tactical terminals
- B.
Air Force weather Agency and Fleet Numerical Meteorology Oceanography Center only
- C.
Air Force weather Agency and National Oceanographic Atmospheric Admin
Correct Answer
A. Air Force weather Agency and Fleet Numerical Meteorology Oceanography Center and tactical terminals -
- 43.
Which early warning center receives Defense Support Support Program warning data from the 460th Space Wing Units?
- A.
Air Force Weather Agency
- B.
Mission Control Squadron
- C.
Mission Control Command
- D.
North American Aerospace defense command
Correct Answer
D. North American Aerospace defense command -
- 44.
For an operational mission, the purpose of the GPS usere segment is to enable users to
- A.
Actively receive satellite broadcast postion, velocity, and time data
- B.
Actively transmit velocity satellite broadcast postion, velocity, and time data
- C.
Passively receive satellite broadcast postion, velocity, and time data
- D.
Passively transmit satellite broadcast postion, velocity, and time data
Correct Answer
C. Passively receive satellite broadcast postion, velocity, and time data -
- 45.
What system supports the national command authority and provides all-service communication for interoperable command, control, communications at all levels of conflict?
- A.
DSCS
- B.
GPS
- C.
DSP
- D.
Milstar
Correct Answer
D. Milstar -
- 46.
What sequence of events must you follow when establishing a communcation link with a satellite?
- A.
Frequency acquistion, space acquistion, antena pointing and satellite tracking
- B.
Satellite acquistion, satellite tracking, power correction, and antenna pointing
- C.
Orbit prediction, antenna positioning, satellite acquistion, and satellite tracking
Correct Answer
C. Orbit prediction, antenna positioning, satellite acquistion, and satellite tracking -
- 47.
Telemetry refers to
- A.
A low power signal transmitted from the satellite and is seperate from the communication components
- B.
The data transmitted by the satellite concerning onboard status and is seperate from the communication components
- C.
The data transmitted by the satellite concerning onboard status and is part of the communication components
- D.
A low power signal transmitted from the satellite and is part of the communication components
Correct Answer
B. The data transmitted by the satellite concerning onboard status and is seperate from the communication components -
- 48.
Information contained in the ephemeris data pertain to
- A.
Predicted satellite orbit
- B.
Predicted atmospheric conditions
- C.
Channels through a satellite that are available for use
- D.
Combinations of ground stations that can communicate with each other
Correct Answer
A. Predicted satellite orbit -
- 49.
Which tracking method requires no input from the satellite?
- A.
Programmed
- B.
Automatic track
- C.
Step track
- D.
Pseudorandomscan
Correct Answer
A. Programmed -
- 50.
Automatic tracking systems are superior to programmed systems beacuse they
- A.
Use servomechanisms to control antenna movements
- B.
Track only signal received from the satellite
- C.
Track actual position of the satellite
- D.
Use updated ephemeris data
Correct Answer
B. Track only signal received from the satellite -
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Jan 25, 2013Quiz Edited by
ProProfs Editorial Team -
Jun 05, 2011Quiz Created by
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