PHYS-339 Measurements Lab

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News

  • New workstations! ws339-01 through ws339-20
  • Do not reboot the workstation.
  • You don't need to use your full email address to log in, you can use just the first.last part, or if you know it, use the DASname / sAMAccounname.

Location

We are currently located in Wong 0120 in the basement of the Wong Building.

Calendar Entry

(3 credits; 6 hours)(Prerequisite: 198-241B) Introduction to modern techniques of measurement. The use of computers in performing and analysing experiments. Data reduction, statistical methods, report writing. Extensive use of computers is made in this laboratory; therefore some familiarity with computers and computing is an advantage.

Syllabus

  • syllabus.pdf (http://www.ugrad.physics.mcgill.ca/resources/339/syllabus.pdf)

People

Experiments

Lab Reports

  • Lab Report Marking Scheme (http://www.ugrad.physics.mcgill.ca/resources/339/PHYS339-2011-Marking_Scheme.pdf) - Marking guidelines for reports detailing breakdown of grade. .=* NEW *=.
  • Lab Report Checklist (http://www.ugrad.physics.mcgill.ca/resources/339/checklist.pdf) - PDF document listing questions you should be able to answer yes to if you don't want to be penalized for technical issues. If you answer no to one of these questions, you need to have a really convincing answer to the follow up question "Why not?".
  • Report Guidelines (http://www.ugrad.physics.mcgill.ca/resources/339/report_guidelines-2011.pdf) - This not so crusty description of what is expected in the structure of the report. Written by DHR, deviate at own risk.
  • General Report Comments (http://www.physics.mcgill.ca/~voyerc/reports_339.pdf) - A short list of comments relevant to the particular class to date. Most information within is included in the report guidelines with a few stylistic additions.

Groups

Wong0120-2012.png

Sources


Documentation on Software

Remote access

You can access your workstation via SSH. The fully qualified domain name is ws339-nn.ugrad.physics.mcgill.ca, where nn is the workstation number.

This may be covered elsewhere in the Wiki, but you can access the Windows_Storage subdirectory of your home directory via the information superhighway at the following service station:

  • https://webfolders.mcgill.ca/students/dasusername

Last time I checked it was not very reliable.

General Lab Report Comments From The TAs

Left for posterity:

Stephen and Christian have supplied a few general comments on the lab reports you may find useful. They include mostly issues that come up quite often and that can not only be easily avoided, but will not go unnoticed.

Past versions

Log

Thursday January 26, 2012

Conditions

Signal sent from MATLAB. Sends alternating stream of high and low voltages, each complete cycle contains 2 samples.

>> set_dac_get_adc(1,3,2000*(mod([0:1000],2)-0.5),100);
>> 

Scope Settings

Tenma 72-6815 Oscilloscope.

  • Horizontal Display: A
  • POSITION: Sweep starts at first division
VERTICAL
  • MODE: CH1
  • CH1 VOLTS/DIV: 5V
  • AC/DC: DC
  • POSITION: Ground at origin
HORIZONTAL
  • A TIME/DIV: 5μs
  • X-Y: disabled
  • SWP. UNCAL: disabled
TRIGGER
  • COUPLING: DC
  • SOURCE: CH1
  • SLOPE: +
  • LEVEL: Adjust for zero crossing at start of trace

Data

WorkstationSample Rate
Numberμs
0140
0241
0341
0441
0541
0639
0741
0840
0942
1022
WorkstationSample Rate
Numberμs
1140
1238.5
1341
1422
1521.5
16
1722
1840.5
1936
2023