Page 10 DP224/6 Operators ManualFront Panel FamiliarisationLCD Screen : shows menu options,channel information, and variousparameters as they are adjusted.Next Key : moves forwards through the list of available parameters.Back Key : moves back through the list of available parameters.Menu Key : activates the main menu. A second press selects the lastmenu edited. Selection of different menus may be accomplished usingthe Back and Next keys, or by turning the ‘Freq’ encoder.Enter Key : enters the chosen menu and confirms choices.Bypass Key : bypasses the currently selected parametric EQ section. Note that,for safety reasons, the high and low pass filters cannot be bypassed using this key.Quit Key : exits the menu.Encoders : three velocity sensitive controls allow therelative parameter displayed on the LCD screen to beadjusted.PC Card : PCMCIA card slot allows back-up of inputmemory sets, unit cloning data and facilitates the download ofsoftware updates.Gain Keys : one for each input and output, allowing instant accessto the gain screen for the selected channel. The accompanying LEDilluminates whilst editing is active.Input Meters : display available headroom below clipping. Theyellow ‘0dB’ LED illuminates at 3dB below the actual clipping pointof the input section. The red ‘D.Clip’ LED shows digital overflow and can thereforeilluminate independently of the rest of the meter.Output Meters: display headroom below limiting. The yellowLED illuminates when the limit threshold is reached for thatchannel. The red LED indicates 4dB of limiting.Mute Keys: mutes the appropriate channel, and illuminates theassociated LED.