Behringer ULTRA-CURVE PRO DSP8024, User Manual

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E
amplitude, clearly illustrates the relationship between the various scales:
Scale
RMS Peak
Dig Max -3 dB 0 dB
+4 dBu +9 dB +12 dB
10 dBV +21 dB +24 dB
Maximum Level
Reading
+16 dBu / +14 dBV
Tab. 2.1: Level meter scale correlation
As can be seen from the above table, the ULTRA-CURVE PROs maximum analog output level is +16 dBu, or
+14 dBV. The ULTRA-CURVE PROs analog inputs can handle signals of up to +21 dBu, but it is important to
remember that, in case of such high input levels, the digital LIMITER may operate if the level in the EQUALIZER
is not appropriately lowered. Please refer to the operation of the digital LIMITER explained in section 2.1.6.
2.1.3 The FEEDBACK DESTROYER
By pressing softkey B you leave the main EQ window and go into the FEEDBACK DESTROYER / PEQ menu.
Fig. 2.4: FEEDBACK DESTROYER display
The display will show the current settings for all 6 of the ULTRA-CURVE PRO Parametric Equalizers (selected
frequency, bandwidth and degree of boost or attenuation). Additionally it will show whether the parameters are
fixed, or are set for automatic search, to function as the FEEDBACK DESTROYER. The following modes are
possible:
Code Mode
AUT
Automatic Search
SGL Single Shot Search
LCK Locked
OFF Gain set to 0 dB
PAR Parametric Equalizer
Tab. 2.2: FEEDBACK DESTROYER filter modes
Auto search means that the audio signal is continuously examined for signs of feedback. If feedback is
detected, the ULTRA-CURVE PRO will assign an appropriate filter to the relevant frequency and apply narrow
band attenuation, also known as a “Notch Filter”. The parameters which have been used will be continuously
displayed. The next feedback will be dealt with by the next available filter. When all the filters have been used,
and feedback still occurs, the filter used for the first, or oldest frequency will be released to deal with the newest
one. If feedback occurs very close to a frequency already being treated, or reappears at a frequency to which
a filter has already been applied, the filter already in use will have its parameters changed to deal with the new
problem, i.e. the bandwidth will be widened, or the attenuation increased.
2. OPERATION
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