Meritech releases Sigma-LA for wireless network troubleshooting, optimization, and maintenance. Sigma-LA records and displays vital information about network performance including physical layer metrics and layer 3 protocol messages. It supports LTE, HSPA, WCDMA, EDGE, GPRS, and GSM. Field measurement plays a critical role in network deployment, insuring that signal coverage reaches users with optimal quality and performance. Sigma-LA provides power test functionality making it an ideal solution for the deployment of 4G technologies.