Date: March 10th, 2014
To: David Michelson, Associate Professor, UBC
CC: yinh@ece.ubc.ca
From: EECE 380 Group L2B1
Subject: Weekly Review
Dear Dr. Michelson,
This was a transition week when we wrapped up and demonstrated the swept-tuned spectrum analyzer project, wrote a report for it, and started the Orbcomm project.
During the first demonstration, our project did not behave desirably. It could only precisely describe RF but not FM signals. Therefore, we applied for a one-day extension to upgrade the project’s behavior. While troubleshooting, we figured out that our problem was probably caused by the large capacitor in peak detector and redundant crystals in RBW filter. Due to these issues, the FM signals with low modulation frequencies overlapped to create distortion. Therefore, we redesigned our circuit by replacing the capacitor and eliminating two of the crystals. As a result, the new spectrum analyzer could plot FM signals with modulation frequency as low as 10 kHz, and we successfully demonstrated at Wednesday night.
On Friday, we were given several guides and slides to read through and start working on the second project. In the lab section, our goal was to send emails to the group email account. We completed the task by modifying codes in the APL.c file, and spent rest of the time gaining knowledge on Q4000 instruction.
Next week, our goals are:
- Split tasks and assign to every group member
- Read and learn the Q4000 data sheet, programmer guide and user guide
- Familiarize ourselves with IAR Workbench, QCT and PUTTY
With Regards,
Yuan Liu