Orban OPTIMOD-Studio 8200ST Controller
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OPTIMOD-Studio 8200ST
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Automatic Gain Controller

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Orban OPTIMOD-STUDIO CHASSIS 8200ST The 8200ST provides transparent gain riding, adjustable compression, high-frequency limiting and absolute peak control — all in a space-saving, rugged, 1 -rack unit high package. The flexibility and natural sound of the 8200ST is ideally suited to many broadcast applications; in particular, protecting discrete studio-to-transmitter links when using OPTIMOD audio processing. Barely adequate signal-to-noise ratio often makes the land line or microwave studio-to-transmitter link the weakest part of the broadcast chain. The 8200ST’s transparent gain control translates to improved effective dynamic range for the link and improved signal quality at the Receiver. Switch-selectable pre-emphasis limiting and peak control ensure proper matching the 8200ST to any standard transmission medium. Features include: • Up to 25dB of gain reduction for two channels of audio. • Defeatable “Silence Gate” — not a conventional noise gate, but a circuit that freezes the level controller’s gain when signals drop below threshold. This gate prevents rush-up of background noise during quieter passages and exaggeration of breathing during pauses in spoken voice. • Flexible level controls: A smooth leveler, activated when the agc button is on, provides slow gain riding. A second, much faster level Controller (one that works in conjunction with the smooth leveler) can be activated with the voice button. • Five switchable HF Limiter pre-emphasis curves (25|i.s to 150|_ls): These pre-emphasis curves allow the HF limiting to complement the medium being protected. • Built-in 400Hz line-up tone generators for easy system alignment. • Two LED bargraphs per channel simultaneously displaying gain reduction and peak operating levels. • Independent or stereo operation, controlled via front panel couple button. • Class-A VCAs with inherently low noise and distortion. • Broadcast-quality interfacing with EMI-suppressed, balanced and floating inputs and outputs. • Defeatable clipper: follows the HF limiter for absolute peak protection.

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Service- und Bedienungsanleitung
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Service- und Bedienungsanleitung
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85
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6.66 Mbytes (6985915 Bytes)
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english
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2017 10 31
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ca8e2f3987ff882ac59c533884a139c9
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1167

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1-1 Section 1: Introduction Orban OPTIMOD-STUDIO CHASSIS 8200ST 2-1 Section 2: Installation Installation 3-1 Section 3: Operation 8200ST Controls and Meters Example Control Settings More About 8200ST Audio Processing 4-1 Section 4: Maintenance Getting Inside the Chassis Performance Evaluation 5-1 Section 5: Troubleshooting Problems and Possible Causes Technical Support Factory Service Shipping Instructions 6-1 Section 6: Technical Data Specifications Circuit Description Parts List Schematics, Assembly Drawings Abbreviations

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