Front Panel Interface33PLM Series Operation Manual Rev 1.3.57.3 Power ButtonThe unit is powered on by pressing the top-left button on the front panel, labelled in Figure 7-1. It has abi-color power symbol which illuminates red when connected to the AC mains and the unit is in standbymode. It turns green when the button is pressed to turn the processor on. A subsequent press of thisbutton returns the unit to standby mode.7.4 Mute Enable ButtonThe dynamic function buttons to the immediate left and right of the LCD are used as MUTE buttons onlywhen the MUTE ENABLE button is activated (flashing).When MUTE ENABLE is activated, the two central buttons on the left act as Module mute controls, and thefour buttons on the right enable muting/unmuting of the power output channels.In Meter Mode > Home View with MUTE ENABLE activated, text on the LCD adjacent to each buttonindicates when a Module input or power output has been muted. Meter Mode must be selected forMUTE ENABLE to be activated; MUTE ENABLE is not available in Menu Mode.To exit MUTE ENABLE mode, press the flashing MUTE ENABLE button. If no mute activity occurs for twominutes, MUTE ENABLE mode will automatically be disabled.7.5 Meter ButtonThe front panel display has two main operating modes, Meter Mode (default) and Menu Mode. In normaloperation, the display will be in Meter Mode.The following views are available in Meter Mode: Home View (default), Module View, Temperature Viewand Input View. Pressing the METER button scrolls through these views. Pressing the METER buttonwhen in Menu Mode will return the system to Meter Mode, with the Home View displayed. Please refer tosection for further information.7.6 Menu ButtonMenu Mode is selected by pressing the MENU button . The screen displays the top level menu withvarious submenu options. Press the button adjacent to the required submenu to select it.Pressing the MENU button while in Menu Mode will display the previous menu level.Menu Mode is used for processor configuration, or for editing a parameter. Please refer to section 7.11 forfurther details.