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24 Cards in this Set
- Front
- Back
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Which year was the first DSCS Phase III satellite launched into orbit?
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1984
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Which publication was written to concisely explain the role of theNavy in the Defense Communications Satellite Program?
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NTP-2
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What is the zone called where the satellite can be seen by both the up-and down-link earth terminals?
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Zone of mutual visibility |
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The frequency range from ELF to SHF is from below 300 hertz up tohow many gigahertz? |
30 |
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What is a non-radiating device called that absorbs the rf and has theimpedance characteristics of the antenna? |
Dummy load |
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What is a small building called that is physically separated from thetransmitter location that contains antenna loading, coupling, and tuningcircuits? |
Helix house |
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Which type of antenna is a special form of a rhombic-arrangedmonopole array that is designed to transmit from a particular location? |
Triatic |
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Communications systems in which portion of the radio frequencyspectrum use line-of-sight propagation? |
1 to 10 gigahertz |
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The distance between microwave system hop points ranges from 50 to150 kilometers (31 to how many statute miles)? |
95 |
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The tropo system uses the turbulence in the layer between thetroposphere and the stratosphere to bounce signals back to earth and has atransmission range up to 800 kilometers (how many statute miles)? |
500 |
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HF has a hop distance (skywave) of about how many miles? |
1,400 |
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The distance of one hop for a line-of-sight system is between 31 andhow many miles? |
95 |
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What was developed by the U.S. Navy as a command tool forcommanders in tactical combat situations? |
NTDS |
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How many separate data transmission links does NTDS use tomaintain tactical data communications between tactical units?
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Three
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What provides high-speed, computer-to-computer transfer of tacticalinformation, command orders, and unit status to all tactical data systems?
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Link 11
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What provides a means of transmitting track information to thoseunits not capable of participating in the link 11 network?
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Link 14
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What permits the computer to take control of the autopilot in anequipped aircraft?
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Link 4A
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What is the international distress frequency?
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500 Kilohertz
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What is the survival craft communications frequency?
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8,364 kilohertz
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What take energy at (or near) the visible light spectrum and convert itto a very narrow and intense beam in the same region?
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Lasers
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Which color of communications lasers could possibly penetrate theocean to great depths?
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Blue-green
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What is a type of two-equipment installation where one unit can besubstituted for another in the event of failure?
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Doubling up
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What acts as a coil and is used with variable inductors for impedancematching of high-power transmitters?
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Helix
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What are conductors or optical waveguides called that readily passlight?
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Fiber optics
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