LAWO Ruby standard configuration User Manual page 163

11. Appendices
11.2 System Reference Levels
Relative System Level
Analog Reference Level
Operating Level (analog)
Operating Level (digital)
The Relative System Level and Analog Reference Level are options defined in the configuration. They
combine to set the operating levels (analog and digital) for the system.
With Relative System Level (dBFS) you define the relative working point internally within the system. This
value can be calculated with the formula "RSL = - digital headroom - 18" or "RSL = working point -18dB".
For example, the working point (0 dBr) for the ARD (German Broadcasters' Network) is at -9 dBFS. From this
follows a Relative System Level (dBFS) of -27. Note that the working point is important as dynamics and
limiter modules refer to this value. When the threshold value is set to 0 dB, the absolute level equals the working
point.
If required, the Relative System Level and Analog Reference Level can be edited using the ON-AIR
Designer. Start by opening the existing configuration, and then edit the Relative System Level (dBFS) and
Analog Ref Level (dBu) options in the 'Tree Definition' (shown below).
ON-AIR Designer Tree Definition: "System -> Definition -> Parameter = Meter"
Then save and transfer the edited configuration to the DSP Core. For more information about the configuration
tool, please see the "ON-AIR Designer User Guide". This is available from the Downloads area at
www.lawo.com (after Login).
ruby standard configuration User Manual
DIN
- 27
15
+6 dBu
- 9 dBFS
Version: 6.4.0/2
SMPTE
- 38
24
+ 4 dBu
-20dBFS
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