You can prevent users from controlling the NION via the front panel by enabling security and then selecting the LOCK option from the main menu.
When security is enabled, the user must enter a four digit numeric password (called a combination) before they can access any settings.
Caution: The FRONT PANEL COMBO feature will secure the NION from front panel access. A lost combination cannot be retrieved and there is no back door. If the combination is lost, the NION must be reset to a virgin state, thereby discarding any resident audio configuration files. Use the FRONT PANEL COMBO and LOCK features with care.