Internal → Calibration

WiFi Card Calibration

As the first important discovery in ORBIT testbed, some (if not most) WiFi cards behaved strangely. Therefore, it is really important to identify those bad cards. The calibration procedure tries to find if the Tx power and RSSI measurement of the card in each 802.11 channel is regular or not.

Calibration Procedure

1. Pick up one node from the grid and take it down from the shelf
2. load baseline-calibration.ndz image to the node
3. Connecting RF cable to one of the card
4. ssh to console.grid
5. ./caliber.pl [mac-addr]
6. check the calibration_central database in idb1.
7. Do above procedures for another card

For developers

• Design Specification for Calibration Experiment
• Flow Diagram of the Main Perl Script (Progress Chart)