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Unformatted text preview: ECE-2025 Spring-2004 Lecture 21 Amplitude Modulation (AM) 2-April-04 3/30/2004 ECE-2025 Fall-03 jMc 2 The way communication systems work How do we share bandwidth ? 3/30/2004 ECE-2025 Fall-03 jMc 3 Cox Cable Strategy: Broadband Cox Cable Strategy: Broadband From a Network Perspective,,, HFC Full Service Network in Residential Areas HFC Full Service Network in Residential Areas 5 MHz 5 MHz 40 MHz 40 MHz 54 MHz 54 MHz Downstream Downstream 750 MHz 750 MHz Upstream Upstream Two Two-Way Way "Broadcast" "Broadcast" Two Two-Way Way Reserve Reserve 550 MHz 550 MHz Voice Voice & & Data Data Svcs Svcs Digital TV Digital TV Services Services Analog TV Analog TV Services Services I m p u l s e Voice Voice & Data Data 650 MHz 650 MHz 30 MHz 30 MHz Spare Spare HDTV, HDTV, VOD VOD Reserve Reserve Residential Residential video, voice, video, voice, data data 750 MHz 750 MHz 1,000 HP Max 1,000 HP Max 750 HP Average 750 HP Average Ring in Ring Ring in Ring Headend Headend Node Node Transport Transport Ring Ring Fiber Fiber 3/30/2004 ECE-2025 Fall-03 jMc 4 Info: Web-CT, Lab, HW Bug in Lab #10 !!! Change the definition of x(t) in Section 4.3 to be X(t) = sin(200 t) CHECK YOUR GRADES !!! Web-CT is the OFFICIAL gradebook Quiz #3 will be 9-April (Friday) Coverage: HW #8, 9, and 10 Chapters 7, 9, 10, and 11 Review Session, 8-April, Thurs @ 7:30pm 3/30/2004 ECE-2025 Fall-03 jMc 5 Quotes Education is what survives when what has been learned has been forgotten B.F. Skinner Education... has produced a vast population able to read but unable to distinguish what is worth reading....
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