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Welcome to ECE 498LG

This course is designed primarily for first year engineering and science graduate students and advanced undergraduates interested in pursuing a career or an advanced degree involving experimental research. The overarching course goal is for students to understand a wide variety of experimental methods and to be able to directly apply them in the lab.

Conference Proceedings

  • The conference proceedings from the poster session are posted here.

New Announcements

  • HW8 and TDR lab solutions are posted here.

Older Announcements

  • Reflectometer lab notes:
    1) The resistor is not 100ohm (somehow 157ohm instead).
    2) Be careful that the time step of the waveform dt from the oscilloscope is correct. There are some issues with working with waveforms and with what the time delay is per data point.
    3) Your program doesn't need to do everything automatically (it would be nice), but you can do some manual calibration if necessary.
    4) The impedance vs feet graph will need the velocity of propagation from part (d) which you can get with just a single cable measurement since t=0 for L=0 is one point on the line.
    5) Your program doesn't have to be able to figure out impedances in transmission lines with multiple reflections.
  • Clarifications for HW8
    In 1, the formula for mu_i (number of counts) should be multiplied by N=4000.
    In 3.c.iii, the schedule variance should be reported for the project overall. This number may be different than the number of person months that the project is behind.
    In 4, you do not need an exact answer, just give an order of magnitude estimate (within 5-10x) and provide brief explanation as to why it is reasonable.
  • Reflectometer lab assignment was updated with more hints in the lab segment.
    The oscilloscopes with working GPIB connections are on the 1st and 3rd of the new computers on both the left and right half of the 251 lab.
    Consider first running and understanding "ag546xx Getting Started.vi" (located in the Instrument I/O pulldown menu in LabVIEW or in the library at C:\Program Files\National Instruments\LabVIEW 8.6\instr.lib\ag546xx\ag546xx.llb) and then adapting it to collect scope waveform data.
  • In case you want to start early, HW8 is posted here.
  • Lecture notes for the middle third of the semester are posted here.
  • Quiz 2 announcements: Friday 11/13 in class, 11-11:54AM. Calculator and 2 pages of double sided 8.5x11" notes are allowed. Stats tables will be provided. No other notes allowed. It will be 12 problems: 5 multiple choice (12 pts), 3 short answer (23 pts), and 4 problems (65 pts). A short practice quiz (20 mins) is posted here.
  • NCH Tone Generator is now installed in 251. Also, you may need to square your signal in LabVIEW to see the nonlinear frequency mixing.
  • Sample conference abstracts are posted from the 2008 booklet.
  • Notes for the lab:
    (1) FYI, NCH Tone Generator can be downloaded here.
    (2) Turn in problem #1 with the lab.
    (3) This lab has no demo.
    (4) At high volumes, the stereo mixer may be non-linear. You may want to view the time domain waveforms or view the mixer output PSD with just the function generator on.
    (5) If you can't find a group, you may work on the laser portion of the lab individually, provided the setup is free.
  • The heterodyne lab assignment is posted here. In part 2d, make sure the dip switches on the back of the mixer are set correctly. Dip switch options are shown on page 6 of the manual.
  • The booklet of abstracts for the poster session is here.
  • Reminder: the draft for the project paper and the poster abstract are due Mon 10/26. See me if you're having difficulty with your project.
  • A sample poster from 2008 is posted here.
  • Samples of the project paper from 2008 are posted here.
  • Quiz scores are posted on Compass. The quiz mean was 87, median 88, and stdev 9.
  • For HWs, it's ok to work together, but write-ups and explanations should be done on your own.
  • Lecture notes for the first half are posted here.
  • Quiz 1 announcements: Friday in class, 11-11:54AM. Calculator and 1 pg of double sided 8.5x11" notes are allowed. Stats tables will be provided. No other notes allowed. It will be ~12 problems: 6 multiple choice, 4 short answer, and 2 problems.
  • A half length practice quiz (25 mins) is posted here.
  • To simplify, all HWs will be due at 11pm. Also, all office hours (Mon & Fri 12-1, Tue 10-11:30AM) will be in Everitt 251.
  • The Matlab code for PID response from Lecture 9 is posted here.
  • Learning tutorials for Matlab, Origin, Mathematica, and Origin can be found here.
  • Lab: With a buddy, 24/7 keycard access in Everitt 251
    ECE 420 and 453 also use this lab at specific times each week
    Please avoid using the front of the lab when 420 meets: Tue and Wed 1:30-4:30PM.
    453 meets and uses the back of the lab: Tue 9-Noon and 3-6PM and Thu 9A-Noon
  • Software can be obtained here.  Microsoft Project used to be free, but is no longer, so we recommend using the EWS labs rather than purchasing it. If other software requires purchasing, please let us know.

Course Staff Contacts

Professor: Lynford Goddard, lgoddard@illinois.edu, Micro and Nanotechnology Lab 2254
Office Hours: Mon and Fri noon-1P and Tues 10-11:30A in Everitt 251, or by appointment

Course Materials

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