Sound Devices 302 - Manual (Page 17)

302 User Guide and Technical Information
17
Peak
An important setting used to display the absolute peak signal level to prevent overload of
downstream devices. Peak-only is commonly used in Europe, but is being replaced by the PPM/VU
combination metering.
VU
Calibrated to display the average loudness of audio signals. This setting is useful when connecting
to analog recorders or in combination with peak readings. VU meters are too slow to be used as the
sole metering source when interconnected to digital devices. At Factory Default, the 302 has its 0 VU
reference level at 0 dBu. The meter reference level can be altered in the Setup Menu. See Setup Menu
for more details.
Peak and VU combination
This setting is very informative as it simultaneously displays the absolute peak level and the average
loudness of an audio signal.
Peak-Hold and VU
Identical to the Peak and VU combination setting with the exception that the peak level is held for
1500 ms. Peak-Hold is useful in applications when an overload condition is unacceptable or when
program material must not exceed a prescribed threshold. This allows for easy viewing of peak
values that could otherwise go unnoticed.
Ballistics Lock
The ballistics setting can be locked to prevent unintended changes. While pressing down the
Brightness button, press the Battery Check button to lock or unlock the ballistics. There is no
indication that the ballistics are locked.
Illumination Intensity
The Output Meter can be set for comfortable viewing in all lighting conditions. There are four levels
of brightness intensities available on the 302. Select the intensity level best suited for the current
environment. To toggle through the available intensities, press the Brightness button on the 302’s
front panel.