Designed in Italy Assembled in China
As the Top Bar, the Vu-Meters and Temperature Bar is ever present during the editing of any Input, Output or
Main Compression/Limiting Pages.
This because this bar is displaying “Status” parameters which is necessary to have under control during the
editing operations within anyone of the mentioned pages.
Particularly, the Vu-Meters and Temperature bar is continuously displaying the following parameters:
Vu-Meters Right Side Bar
Temperature
: here is displayed the Temperature Level expressed in Celsius
degrees and taken by a temperature sensor located on the metal heat-sink
dissipating the heat of the all power parts of the SPRO2 module.
Input Levels:
this set of meters is displaying....
Before Gain: the ABSOLUTE Input Level.
The value displayed here is the Level of the Input Signal SOON after the A/D
converter, so this is a very important indicator, which is showing, in case of CLIP,
that the Level reduction, in order to avoid distortion, can be operated ONLY
reducing the Analog Input Level through the external potentiometer.
After Gain: the Input Level to the DSP processes, AFTER the GAIN control.
The value displayed here is the Level og the Input Signal adjusted by the Input Gain
Control.
Stereo Cmp: this meter is displaying in negative dB, the action, in terms of RMS
Compression, of the Main Compressor on the Input Signal, for containing any
eventual excess of Power request in time, in order to avoid the SPRO2 entering
protection conditions or reduced power delivery due to an excess of lasting
request of power from the system (see later)
Limiter: this meter is displaying in negative dB, the action, in terms of Limiting, of
the Main Limiter on the Input Signal.
Particularly, this Limiter is working as Side Chain Peak Limiter on the detection of
overow detected by the DSP in its own internal processes: if an overow in one
of the internal processes is detected, the Limiter goes quickly to limit the Input
level of the Signal BEFORE to ow into the following processes, so to guarantee
to avoid heavy digital overow (clipping) conditions.(see later)
Output Low/High Levels:
this set of meters is displaying....
Before Cmp: the value displayed here is the Level of the Processed Signal after
the all filtering and BEFORE the RMS Compressor available on both Low and High
ways path.
This meter is indicating if any overload is occurring before the compressors
action.
After Vol: the value displayed here is the Level of the Processed Signal after the
RMS compression and AFTER the Output Level, operating also as Make-Up for the
signal passed through the RMS compression action.
This is the Output Level going to the Amplifier Stage input.
Compressor: this meter is displaying in negative dB, the action, in terms of RMS
Compression, of the Compressor on the Output Signal path, after the all filtering
processes.
PDA500P User Manual
