thought of the day

11
Thought of the Day IT 327 - Schweber Chap 11 1 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

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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. Thought of the Day. Schweber , Chap 11: Digital Communication Fundamentals. - PowerPoint PPT Presentation

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Page 1: Thought  of  the  Day

IT 327 - Schweber Chap 11 1

Thought of the Day

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

Page 2: Thought  of  the  Day

IT 327 - Schweber Chap 11 2

Schweber, Chap 11:Digital Communication

Fundamentals

Page 3: Thought  of  the  Day

Chap 11: Complete Digital Communication System

IT 327 - Schweber Chap 11 3

Page 4: Thought  of  the  Day

Shift Register (AKA: SERDES)

IT 327 - Schweber Chap 11 4

Page 5: Thought  of  the  Day

Chap 11: Layers of Communication

IT 327 - Schweber Chap 11 5

Page 6: Thought  of  the  Day

Companding

IT 327 - Schweber Chap 11 6

Page 7: Thought  of  the  Day

Bit-Level Synchronization

IT 327 - Schweber Chap 11 7

Page 8: Thought  of  the  Day

Synchronizing: Options

IT 327 - Schweber Chap 11 8

1. Send the clock as a separate signalA. Requires separate channel, more BWB. Common for short-distance communication, where each channel is nearly free

2. Reference a common signalA. 50 Hz, 60 HzB. GPS clock

3. Derive clock timing from the received data4. Use special bits as part of the data stream

#3, 4 together by far the most common for distances over about 15 feet.

Page 9: Thought  of  the  Day

Synchronizing: PLLs

IT 327 - Schweber Chap 11 9

Page 10: Thought  of  the  Day

Synchronizing: PLL Capture & Lock

IT 327 - Schweber Chap 11 10

Page 11: Thought  of  the  Day

Synchronizing: PLL Special

Bits

IT 327 - Schweber Chap 11 11