ITM 301 Chapter Notes - Chapter 5: Twisted Pair, Line Code, Statistical Time-Division Multiplexing

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Franklyn Prescod

Document Summary

T(cid:396)a(cid:374)s(cid:373)issio(cid:374) te(cid:272)h(cid:374)i(cid:395)ues i(cid:374) use o(cid:374) toda(cid:455)"s (cid:374)et(cid:449)o(cid:396)k a(cid:396)e (cid:272)o(cid:373)ple(cid:454) a(cid:374)d (cid:448)a(cid:396)ied. This se(cid:272)tio(cid:374) (cid:272)o(cid:448)e(cid:396)s fu(cid:374)da(cid:373)e(cid:374)tal (cid:272)ha(cid:396)a(cid:272)te(cid:396)isti(cid:272)s that defi(cid:374)e toda(cid:455)"s data t(cid:396)a(cid:374)s(cid:373)issio(cid:374) Analog signals - vary infinitely and continuously: appear as a wavy line when graphed over time. Analog signals are characterized by four properties: amplitude. Measure of strength at given point in time: frequency. Number of times amplitude cycles over fixed time: wavelength. Distance between one peak and the next: phase. Progress of wave over time compared to a fixed point. Drawback of analog signals: varied and imprecise voltage. Network connection may handle only analog signals. Data modulation: technology modifying analog signals into digital signals and vice versa, make analog signals suitable for carrying data over a communication path. Carrier wave: combined with another analog signal, produces unique signal. Transmitted from one node to another: preset properties, purpose: convey information. Information wave (data wave: added to carrier wave, modifies one carrier wave property.