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Extra resources for Adaptive antennas : concepts and performance

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16. 17. 18. 19. 20. 21. Long-term use load Vertical rise distance Flame resistance UV stability or UV resistance Resistance to damage from rodents Resistance to damage from water Crush loads Resistance to conduction under high voltage fields Toxicity High flexibility/static versus dynamic applications Abrasion resistance Resistance to solvents, petrochemicals, and other chemicals Hermetically sealed fiber Radiation resistance Impact resistance Gas permeability Stability of filling compounds Vibration Temperature Range of Operation The temperature range of operation is the temperature range within which the attenuation remains less than the specified value.

Several simplex units cabled together 60 CHAPTER 4 — OPTICAL FIBER CABLES 5. When pulling fiber it is best to pull on the ________________ of the cable. a. fiber b. buffer tubes c. jacket d. strength member 6. The minimum bending radius of an optical fiber cable should be no less than ________________ times the cable diameter when being pulled into place. a. 10 b. 15 c. 20 d. 25 C H A P T E R 5 SPECIFYING FIBER OPTIC CABLE E R I C P E AR S O N CABLE PARAMETERS AND TYPICAL VALUES In order to completely specify a fiber optic cable, you need to define at least 38 specifications.

CHAPTER 4 — OPTICAL FIBER CABLES 57 Direct Burial Generally, only heavy-duty cables can be directly buried. Numerous hazards affect directly buried optical fiber cables, such as freezing water, rocky soils, construction activities, and rodents (usually gophers). Burying the cables at least 3 or 4 feet deep avoids most of these hazards, but only strong metal braids or cables too large to bite will deter the gophers. When plowing is used as an installation means, only loose-buffered cables are used, since they can withstand uneven pulling pressures better than tightbuffered cables.

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