LabVIEW Qnet daq, from the UW WALTA group

Download the program - Version 2.2.0

Binary executable (windows installer) Download this zip file, unzip it into a temporary directory and run its setup.exe. An application QNET2 will appear in your Start menu. Note that if qnet2 is already installed, you have to run setup twice. [Note: this does not work with Windows 98, for now you must use the installer for version 1.9.1.]
Source code: If you have the development system (LabVIEW 7.1 or 7.1 express) here is a zip of the source vi's.
Older sources: 2.1.0, 1.9.1, 1.3.0 1.2.0 1.1.0, 1.0.0

muon_decay.zip: (27K events, 10-sec interval scalar data) muon telescope: 3 60x60 cm counters in channels 0,1,3 top to bottom, with the daq card set for coincidences in channels 0,1 veto in 3, 10 usec gate width.
minime-4-2.zip: (24K events) Taken with an air shower array (4 counters forming a 10 m cross) at the WALTA 2003 workshop.

Automatically generates file names for data acquisition
uses the "VISA" interface to read the serial port, allowing more than COM1 or COM2. Settable from a .ini file.
process data either from the card or a saved file at a rate of up to 10 kHz (the Qnet daq card is limited to ~30 Hz at 38.4 Kbaud)
Can set daq card to veto mode, adjust overlap (for the muon decay configuration)
coincidence window can be set to any width up to the maximum (10 us is appropriate for muon decay)
monitors the Qnet2 daq card buffer and flags possible overflow (which implies lost data)
optionally generates periodic scalar data
displays and analyses scalar data
can generate an "Excel" file of events for later analysis

Qnet FileOutput Procedures:

Run Qnet2 and select “Qnet Card”
Select the desired card configuration “Expert”, “Air shower”, etc
Click on the OutputFile Tab
Open up Windows Explorer “Windows Key + E” or My Computer
Create a folder in the desired directory you wish to keep you data (Suggestion: Folder Name: Data in My Documents
Once the folder has been created, highlight the path name, (next to “Address”), and press Ctrl + C
In the Qnet Program, highlight the entire set of letters next to the button “Change Directory” and press Ctrl + V
Press the “Change Directory” button, data files will now be saved to this location
Now press Begin Saving Data; the first time you run the program, you will be asked to type in your group name. Note that the filenaming is done automatically and you can see where you file is being stored next to the Begin Saving Data button
Subsequently you will not have to enter your group name, if you wish to change it press Reset User Name button, then turn on the Begin Saving Data button, or if you were already saving data, turn it off and then on again, and then you will be prompted
If you wish to change the file number, there is a manual override, and it works the same way as the Reset User Name, be warned that duplicate files will be over written
Future releases of Qnet will feature a automatic file timing system which will start new file automatically after a certain amount of time to cut down on large file size

Notable Fixes

Scalar graph is no longer problematic, it updates correctly
Fixes have been made to the hardware, so a button has been placed to have behavior for newer and older cards selectable

Last modified: 07/11/2006