V O R S I S H D P 3 G U I
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HD P3 / Aug 2006
Asymmetric Output Peak Limiter
The look-ahead output limiter in conjunction with its zero-attack-time
“clipper” ensure zero overshoot, and allow one to get very close to sender
linear modulation extremes with confidence. The limiter’s “Threshold”
represents the negative-going peak level, whilst the positive-going thresh-
old is separately controllable to afford up to 150% positive modulation.
(The current US limit is 125%.).
Bear in mind that if set at say 130%, that is 130% of whatever depth the
negative-going level is set to in the real-world on the actual sender; if that
happens to be 90%, then the “actual” positive modulation will be 90% of
130%, or 117%. For a typical real-world depth of 95% negative modula-
tion, the “Positive Modulation” control would need to be set at 131% to
achieve actual 125% sender positive modulation. Confused yet?
Pos. Mod. Dial % = (100 / actual neg. mod.%) * desired Pos. Mod. %
The closer to 100% negative modulation one has the nerve to achieve,
the closer the displayed and actual positive modulation numbers will
agree.
Mono
In the event that there is no mono program source available from the
console / program suite, the left and right signals may be applied to the
appropriate inputs on the HD P3; the “Input” “M/S” switch will sum the
left and right sources to mono in the “Left” or ”A” path of the unit, which
can be set up for mono processing, the “Right” or “B” path being ignored.
Parametric Equalizer
This powerful four band parametric equalizer is selectable to be prior
to or after the compressor (“pre” or “post”).
