Orban OPTIMOD-FM 8600Si, Operating Manual

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OPERATION ORBAN MODEL 8600Si
distortion-controlling processing that precedes the final clipping section. The distor-
tion-controlling section uses a combination of distortion-cancelled clipping and
look-ahead processing to anticipate and prevent excessive clipping distortion in the
final clipper.
This control does not affect the HD processing chain.
MB Limit Threshold (not in MX presets) determines the threshold of the looka-
head clipping distortion controller (measured in dB) with reference to the final clip-
per. In general, it should be set at “0” so that it matches the threshold of the final
clipper. Setting it higher than “0” allows more punch (due to clipping) at the ex-
pense of higher clipping distortion, which may be particularly annoying on voice.
This control does not affect the HD processing chain.
2B HF Limiting (not in MX presets) sets the threshold of the high frequency limiter
in the Two-Band structure. When this control is set lower, gain reduction does more
high frequency limiting. When this control is set higher, distortion-cancelled clipping
does more high frequency limiting. It controls the tradeoff between loss of high fre-
quencies (due to high frequency limiting) and excessive distortion (due to clipping).
This control only affects the analog processing chain.
The HF Limiting control is in the clippers screen in the unit.
HF Clip Threshold (not in MX presets) sets the threshold of the multiband, distor-
tion-cancelled clipper in the Two-Band structure’s high frequency limiter. Higher
numbers yield more brightness, but also cause more high frequency distortion.
This control does not affect the HD processing chain.
Max DistCntr (Maximum Distortion Control ; not in MX presets). See Max Dist Ctrl;
page 3-68.
Speech Thresh
(Speech Threshold) control. See MB Speech Threshold on page 3-71.
The Two-Band MX presets have the same peak limiting controls as the Five-Band MX
presets. See
8600Si MX Technology Peak Limiter Controls starting on page 3-49.
The Five-Band Structure
The Five-Band structure consists of a stereo enhancer, a slow gain-riding two-band
AGC, an equalization section, a five-band compressor, a dynamic single-ended noise
reduction system, an output mixer (for the five bands), and a complex peak limiting
system.
Unlike the Two-Band structure, whose two-band compressor has a continuously vari-
able release time, the release time of the Five-Band compressor is switchable to sev-
en increments between slow and fast. Each setting makes a significant difference in
the overall flavor and quality of the sound.