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IT 327 - Schweber Chap 111 With thoughtless and impatient hands, we tangle the plans the Lord hath laid. Then when we cry in pain, He answers, “Be patient,

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Presentation on theme: "IT 327 - Schweber Chap 111 With thoughtless and impatient hands, we tangle the plans the Lord hath laid. Then when we cry in pain, He answers, “Be patient,"— Presentation transcript:

1 IT Schweber Chap 111 With thoughtless and impatient hands, we tangle the plans the Lord hath laid. Then when we cry in pain, He answers, “Be patient, my son, and wait while I untangle the knot.” Elder Boyd K. Packer

2 IT Schweber Chap 112

3 Chap 11: Complete Digital Communication System

4 Chap 11: Layers of Communication

5 Shift Register (AKA: SERDES)

6 Companding

7 Bit-Level Synchronization

8 Synchronizing: Options 1.Send the clock as a separate signal A.Requires separate channel, more BW B.Common for short-distance communication, where each channel is nearly free 2.Reference a common signal A.50 Hz, 60 Hz B.GPS clock 3.Derive clock timing from the received data 4.Use special bits as part of the data stream #3, 4 together by far the most common for distances over about 15 feet.

9 Synchronizing: PLLs

10 Synchronizing: PLL Capture & Lock

11 Synchronizing: PLL Special Bits


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