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Unformatted text preview: e power in a band of H herz is N0H. S is the signal power. ATTENUATION is bad because:
1. Weakened signal reduces S/N, information
2. Attenuation is usually greater at the higher
frequencies. In relaying a digital signal, it is better to
regenerate it at each relay station than to just
amplify it. GUIDED TRANSMISSION MEDIA
Twisted pair, Coaxial cable, Optical fiber
Guided media attenuation - measured in dB per
kilometer V is voltage, P is power.
Twisted Pair - a pair of wires twisted together
to reduce electromagnetic coupling to and from
the wires. Coaxial cable...
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- Fall '08