Why do I Have a Letter L in my Status Area on my Vantage/Vanguard?
If you see the letter L in your Status Area, this means that Data Logging is ON.

What is Data Logging (also called LAM)?
Aclinician or teacher can use the Data Logging/LAM capabilities in your device to analyze clients' language activities. This can be helpful for clinical intervention, outcomes measurement and research.
Please see the following article for complete instructions on using the Data Logging feature:
http://support.prentrom.com/article.php?id=316
Data Logging can be turned OFF in the REVIEW VOCABULARY MENU.