For wireless facilities,there is a relatively free choice of where antennas are to be located.
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Q10: Multipath problems are particularly problematic in line
Q11: Digital signaling usually means that the information
Q12: Given a frequency of 60 Hz (
Q13: Nearly all signals used for communications are
Q14: Referring to Shannon's equation,in order to increase
Q16: Typically,crosstalk does not have a debilitating effect
Q17: Refraction refers to the bending of the
Q18: The various forms of noise include thermal
Q19: Electromagnetic signals:
A)are used only for optics
B)are used
Q20: In the telephone system,conversions are reproduced using
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