SPL Phonitor 3 Desktop DAC with Rack Expander - Handbuch (Seite 6)

Phonitor 3 DAC – Manual
6
VU Meters
The VU meters display the input levels for the selected source.
The meter indicates levels from -20 dB to +5 dB.
0 dB corresponds to +4 dBu.
The ballistics of the VU meters guarantee an optimal visual
perception. The time calibration of the VU meters complies
with the requirements of the BBC.
The rise time up to 0 dB is about 300 ms.
VU Cal
With the VU Cal switch you can lower the sensitivity of the VU
meters by 6 dB or 12 dB. This way the display range can be
adapted to higher input levels.