Grass Valley PVS Series System Guide v.4.0 Dec 10 200 - Manual (Page 168)

Chapter 6 Modifying a Channel: Audio Settings
168 Profile XP System Guide July 27, 2001
Selecting audio reference level
The audio reference level is used by Profile applications to scale audio level meters.
Setting the audio reference level determines the absolute value at 0db.
To set the audio reference level, select Audio Reference Level in the Configuration
Manager window, then select the audio reference level used at your facility.