SignalTools Display Options For more information, see the following topics: SignalTools Phase Meter Display Signal Tools Leq(A) Meter Display Selecting Channels for Leq(A) Metering Signal Tools Leq(A) Metering Controls Both SignalTools plug-ins offer two display options: Phase Meter Display and Leq(A) Meter Display. To choose a display option: Click the corresponding button in the Options section of the plug-in window. SignalTools display options