Galaxy Audio DS-CP22 - Manual (Page 35)

In order to properly use the indication of the Input Level Meters, it is necessary to note that the
Input level to the DS-CP22 is not considered “absolute” information, due to the fact that before the
A/D converter, the absolute Input Level can be “adjusted” by the analog potentiometer “Input
Level”.
For this reason, the meters of the Input Level Display on the LCD are intended to show the Input
Signal Level detected by the DSP after the A/D conversion, considering as 0dBu the Maximum
Input accepted and converted by the A/D.
On the basis of the above, the following table provides the relationship between the Input Level
Meters and the Signal Level in the digital domain, before the DS-CP22 processes, assuming not
clipping the Signal after the A/D.
Therefore it is important, in order to have reasonable indications from the Input Level meters, to
ensure the Input signal isn’t clipped.
Remember that the Input Signal Clip is occurring when the Absolute Input Signal exceeds
+15dBu (Clip on the Op Amps before the A/D converter), or when the Red Clip LED is On.
Setting the DS-CP22 in a “0dBu Path” condition (see the introduction for the 0dBu Path
Definition/setting), the following table shows the relation between the Input Level Meters and the
absolute Input Level after the A/D converter and the before the DS-CP22 processes.
Refer to the following picture:
34
Input Meter Table