Run-time Mode
LCD Display
On power-up, the DC-One boots and displays the run-time screen. The current preset memory location and name are displayed as well as the configuration on which the preset is based.
Caution Before operating the sound reinforcement system, and any time a new preset is recalled, check the configuration display to make sure that it is appropriate for your system and that connections to your system are correct for the current configuration. Failure to do so could cause unexpected results or damage to the system or its components.
The LCD display’s contrast can be adjusted in the Setup Menu to accommodate different viewing angles.
Input Level Meters
During operation, the left and right input level meters display the signal present at the DC-One’s analog and Digital inputs. The DC- One does not itself have input level controls. Proper input level setting is accomplished by setting the output level from the (L / R) bus outputs from the connected mixer or other audio source.
Optimal signal-to-noise performance is obtained when the nominal (average), input level consistently lights the +3dBu (green) and / or +6dBu (yellow) LED indicators. As the DC-One is a digital audio device – and digital clipping produces very unpleasant results – the Clip (red) LED should never light. If it does, reduce the output level of the connected mixer.
Output Level Meters
Each output channel has an eight-segment output level VU meter. Meter response characteristics can be selected in the Setup menu:
Normal Fast, Peak-Hold or Slow Decay. The yellow segment indicates that limiting is being applied to the output channel. It is important to understand how the meters work and what they are displaying. The Output Meters are displayed as “dB to Limiter Threshold”. In other words, these meters will display the headroom between the output level and the limiter threshold. When viewed in conjunction with the Gain Reduction meters, this provides a complete display of level and headroom before and after limiting has been engaged to allow system levels to be optimized. This also means that the output metering will be displayed differently depending on the limiter threshold setting. The red segments indicates clipping of the D/A converters and should be avoided by adjusting the Output Level setting of the output channel.
