Adaptability Through Switchable Audio Processing Structures - Orban OPTIMOD-FM 8200 Operating Manual

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INTRODUCTION

Adaptability Through Switchable Audio Processing Structures

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The 8200 Audio Processor can be configured for analog and/or digital inputs and
outputs.
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The analog inputs are transformerless, balanced 10kΩ instrumentation-amplifier
circuits, and the outputs are transformerless, balanced, and floating with 30Ω
impedance to ensure highest transparency and accurate pulse response.
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The optional Digital I/O follows the AES/EBU standard, operating at 32kHz.
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All input, output, and power connections are rigorously RFI-suppressed to Or-
ban's traditional exacting standards, ensuring trouble-free installation.
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The 8200 Audio Processor is designed to work perfectly with Orban's studio
level control units (which are commonly used to protect transmission links in
installations where the audio is passed from studio to transmitter in left/right
form, using telephone/post lines, dual-microwave STLs, or similar).
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A processing structure is a program that operates as a complete audio processing
system. Only one processing structure can be active at a time. Just as there are
many possible ways of configuring a processing system using analog components
(such as equalizers, compressors, limiters, and clippers), there are many possible
processing structures achievable by the 8200. The 8200 realizes its processing
structures as a series of high-speed mathematical computations made by Digital
Signal Processing (DSP) chips.
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The 8200 is shipped in various versions containing different sets of processing
structures. Refer to the unit's rear panel for your Model # and the inside of the
front cover of this manual for the structures included in your model.
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The optional Multi-Band Structure is the ultimate processing for the competitive
major market sound. It gives your station more punch, more consistency, more
presence, and more brightness, without pumping or other unnatural artifacts. It
lets you set the speed limit — FAST, MEDIUM FAST, MEDIUM SLOW,
SLOW. FAST creates a synthetic sound, an illusion, a dramatic, "theatrical"
sound that is ideal for competitive, high-energy hit music formats. SLOW creates
a very open sound, a sound that is very life-like with a distinct improvement in
clarity.
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The Two-Band Normal Structure is an improved version of Orban's classic
8100A OPTIMOD-FM sound that has helped make thousands of stations suc-
cessful. It produces an open and natural sound, whether used for light control over
levels, or for the heavier processing often desired for some popular music
formats. It can be set up to maintain high fidelity to the source material, or to
create a sound that is loud and dense.
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The Two-Band Purist Structure is designed for the purist who wants to trade-off
3dB of loudness for constant group delay at all frequencies (linear phase)
throughout the 30Hz to 15kHz range.
OPTIMOD-FM 8200