LED Indicators
LED metering of both input and output are provided. Input metering is indicated as relative to 0 dBfs (digital clipping of the input signal) and output metering is indi- cated in actual output voltage levels in dBu. Meters are
The lower input metering LEDs will remain illuminated as successively higher levels are indicated. When 0 dbfs is reached, ONLY the upper red LED will illuminate (lower LEDs will extinguish). If 0 dBfs is indicated often, reduce input signal level to the SC28. This will reduce possibly audible distortion caused by clipping the digital input of the SC28.
The output meters indicate the actual output voltage level in dBu (0dBu=0.775Vrms). Most QSC amplifiers clip/limit at about +4 dBu input level.
LCD Display and Control (Rotary Encoder)
The SC28 has a 2 line X 16 character LCD display. The display and the
The accessible menus and sub menus may appear dif- ferently than example shown. Software updates may occasionally improve the interface. On the following pages are shown the basic navigation flow for the SC28 menu system; Setup, EQ, Gain, and Utility.
Notes:
When editing parameters such as Gain or Filter Fre- quency, turning the knob more quickly (i.e. “spinning”) will accelerate the parameter’s change.
LCD Icon key:
Loudspeaker protection/clip limiting is active
Turning the knob to the right will increment the current selection
Turning the knob to the left will decrement the current selection
Pressing knob will enter
Input metering for the SC28- Note digi- tal clipping will be indicated by ONLY the top red LED being illuminated.
Output metering for the SC28- Meters indicate actual voltage level in dBu for each output. +4 dBu is maximum input level for most QSC amplifiers.
LCD display of the SC28- Typical loud- speaker configuration parameters shown.
Control knob (rotary encoder)- Adjust- able parameters can be changed by rotating the knob and accepted/ selected by pushing in on the knob.
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