How are the LED meters calibrated?

The 6 LED meter on the front of the unit is calibrated 0dBFS = +22dBu (the maximum level which can be correctly converted by the optional internal A/D converter before overload occurs). The meter calibration points are as follows:


Meter panel calibration value in dBFS Equivalent dBu value
0
+22
-2
+20
-6
+16
-12
+10
-18
+4
-42
-20