The numbers in parentheses indicate the number of marked items (1 mark each). Labs Lab 1 Pre-Lab (3) - cover page information - correct sum of digits - C program listing Lab 1 Report (4) - hexedit screen capture - audacity screen capture - scope screen capture - C program listing Lab 2 Pre-Lab (3) - 1. high >+5V - 2. for DTE, RXD data is the input (pin3 on 25-pin connector) - reasonable C program Lab 2 Report (3) - teraterm screen capture with name - 'scope screen capture with waveform - copy of code Lab 3 Pre-Lab (3) - C and L specifications for Cat 5 (52pF/m, 0.5uH/m) - min/max - a spreadsheet Lab 3 Report (3) - package letter - table with calculated values - comparison with published values Lab 4 Pre-Lab (3) - factor is 1.41 - gain is V/6 - sweep rate is 3/(14*f) Lab 4 Report (3) - low-pass - ~30kHz bandwidth - attached spreadsheet (.xls) Lab 5 Pre-Lab (3) - Q2(a): -0.6+0.6 = 0 V average - Q3: accuracy specified to 100 kHz - Q4(b): 10/256 = 40mV Lab 5 Report (3) - 3 (unique) waveform plots - sine and noise histograms - table comparing RMS measurements Lab 6 Pre-Lab (3) - q1: random numbers - q4: converts to a column vector - q8: 100 kb/s Lab 6 Report (3) - three screen captures - plot comparing spectra - frequency of first null = 100kHz for NRZ, 200kHz for Manchester Lab 7 Pre-Lab (3) - 1: schematic - 2(d): voltage doubler, voltege inverter - 6: 30V/us Lab 7 Report (3) - reasonable mark/space voltages (~9V) - reasonable output impedance measurement (>300 ohm) - slew rate measurement (reasonable data and result <30V/us) Lab 8 Pre-Lab (4) - includes preamble - correct source & destination addresses - includes name in data field - includes a checksum Lab 8 Report (4) - screen capture at start and end of frame showing differential voltage about +/- 0.5V - wireshark screen capture showing your name - correct preamble frequency Assignments Assignment 1 (8) Q1: 600 Hz, 10 bits (2) Q2: minimum 1, maximum 2 16-bit values (2) Q3: 169 km (1 for equation, 1 for answer) Q4: 112 or 166 ohms (") Assignment 2 (4) Q1: not suitable Q2: THD ~37% Q3: ~22% Q5: 1000 x 2pi V/s Assignment 3 (6) Q1: amplitude ~0.38, frequency = 60 Hz Q2: 1.4 Mb/s 400 kHz Q4: (a) distance is 4 (c) correct to DABC Mid-Term Exam One mark per listed item unless indicated; if 2 marks then one for correct method and one for correct answer. Q1 - binary representation - 3 bytes - some bytes correct - all byte values correct Q2 - correct binary value from ASCII table - correct bit order - correct start/stop/parity bit locations - correct voltage levels and bit durations Q3 - dielectric constant (2 marks) - Z0 (2 marks) Q4 - t = 2 (2 marks) - P = 2% (2 marks) Final Exam Q1 - bit rate is 1/period - baud rate is the same - hex value - yes, parity - ascii character letter Q2 - convert center conductor diameter from AWG to mm - find the equation for the shield diameter - correct shield diameter - compute velocity and time from dielectric constant Q3 - work out equation for P0 - correct answer for P0 - compute THD (0.5 if used wrong value but correct formula) Q4 - correct time - correct levels (-1, 0, +1) - correct waveform Q5 - CRC length = 3 - correct generator poly in binary - correct calculation method for CRC - correct CRC answer Q6 - minimum distance = 2 (2 marks) - yes, can detect - no, cannot correct Q7 - (a) bits/symbol - (a) number of symbols - (b) yes, passes DC - (b) LP - (c) go-back N ARQ