The numbers in parentheses indicate the number of marked items (1 mark each). Labs Lab 1 Pre-Lab (3) - q1a: rms voltage of square wave is 1.5x - q3a: average voltage is 0.2 - q5a: 1024 levels for 10-bit ADC Lab 1 Report (4) - three waveform plots - three histograms - table with comparison of RMS voltages (reasonably corrent) - explanation includes DMM bandwidth limitations Lab 2 Pre-Lab (4) - calculation of sum of digits - drawing of waveform with correct bit polarities - correct computation of sample period and rate - C program (any reasonable attempt) Lab 2 Report (4) - screen captures x3 - listing Lab 3 Pre-Lab (3) - AWG levels >+/- 5V - pin is rxd (must specify a name) - correct bit rate from sample rate - a reasonable listing Lab 3 Report (3) - screen capture with name - 'scope capture - corrected C code listing Lab 4 Pre-Lab (2) - 2(f): 5V - 8: 2k Lab 4 Report (4) - mark/space voltages & screen capture - reasonable output impedance measurement - screen capture showing slew rate Lab 5 Pre-Lab (3) - schematic w/ enable - differential output - 1/(10*20ns) = 5 Mbps Lab 5 Report (3) - mark and space voltages - differential waveform - slew rate Lab 6 Pre-Lab (3) - rand() - type of return - > result type - .' operator Lab 6 Report (3) - 3 screen captures - one plot comparing the spectra - frequencies of first nulls Lab 7 Pre-Lab (2) - a listing of a modified C program - vertical gain of V/6 Lab 7 Report (4) - program listing - graphs of amplitude and phase vs frequency - submitted spreadsheet Lab8 Pre-Lab (2) - spreadsheet - with calculated values Lab 8 Report (5) - flowgraphs - waveform screen captures - spreadsheet - plot with two curves - correctly calculated coding gains Lab 9 Pre-Lab (1) - reasonable hex screen capture Lab 9 Report (4) - hexedit screen capture - scope screen capture showing differential waveform - wireshark screen capture showing name - correct preamble frequency Assignments Assignment 1 (10) Only the following were marked: Q1: (a) ~4 bpp (b) 488 Mb/s Q3: (a) a character and (b) a 2-byte U+ code point Q4: (a) a histogram with two values (b) a center-weighted histogram (c) normal (Gaussian) distribution Q5: (a) 144 dB (c) 96 kHz Q6: (a) 2 bits/symbol (e) baud rate = 1kHz Assignment 2 (11) Q2: (a) uniform pdf (b) pdf = 5V (d) 10% Q3: (a) 512 (or 511) patterns (b) 1 pattern (or 0) (c) 9 patterns Q4: (a) peak = sqrt(2)*10A*1ohm=14.1V (b) an answer that is consistent with (a) Q5: (a) X=1, Y=0 Q6: (a) 1/2 (d) 5ms Assignment 3 (9) Q1: (a) 2/3 or .64 (b) yes (or no with reasoning) (c) yes Q2: (a) 1 bit (b) 0 (c) 1 (or 2 if include MS bit that is always 0) (e) XOR (f) even Q3: (a) 2 MHz Midterm Exam 1 Question 1 - correct bit order - correct bit polarities - correct parity - start bit - voltages - bit duration Question 2 - probabilities of B and C - correct formula for computing entropy - correct answer Midterm Exam 2 Question 1 - 1 for each correctly-encoded bit Question 2 - computing sigma - computing t - finding P(t) - finding BER Final Exam Marks assigned as follows (total of 33): Question 1 (5): - bit values - bit order - hex value - character - parity Question 2 (4): - encoded bits (2 marks: 4 * 0.5) - additional bits (2 marks: 4 * 0.5) Question 3 (4): - CRC length - division set up correctly - correct method - correct answer Question 4 (3): - compute normalized threshold - look up CDF value - compute probability Question 5 (3): - ignore leading bits - correct number of bits - remove bit-stuffing Question 6 (3): - Dmin - detectable errors - correctable errors Question 7 (4): - correct SNR - convert SNR to linear units - use correct formula - correct answer Question 8 (7): - answer: DCE - answer: Yes, asserted. - answer: 25 or 16 V/us - answer: 7 or 5 V - answer: 4 V - answer: 2047 or 1023 (2 marks)