Processor

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Inovonics Model 260 FM "Utility" Processor The Model 260 is a multifunction stereo audio processor offering AGC, dynamic range compression and split-spectrum peak limiting in a single, easy-to-use package. The three functions comprise a complete audio processing chain, or may be accessed singly as dictated by the application. Developed to satisfy a multitude of basic audio processing requirements, the 260 eliminates the need for the user to adjust any processing parameters. This makes it ideal for TV-aural, educational FM and similar applications that do not demand aggressive processing, yet do require absolute program level control. Gated AGC and compression; program-controlled ‘floating platform’ limiter release characteristic. Feedforward pulse-width-modulation (PWM) audio processing for a very smooth sound devoid of processing artifacts. Unique level alarm warns of ‘dead air’ and out-of-limits operation. FREQUENCY RESPONSE: ±0.5dB, 10Hz-15kHz NOISE: Better than 75dB below 100%-modulation output level, 10Hz-15kHz DISTORTION:(With full AGC correction and 10dB dynamic reduction); <0.5%THD, 20Hz-15kHz; <0.25%THD, 50Hz-10kHz CROSSTALK:Better than –60dB, 10Hz-10kHz PROGRAM LINE INPUTS (L/R):Active-balanced, bridging; accept program audio levels between –20dBu and +10dBu. PROGRAM LINE OUTPUTS (L/R):Active-balanced, 600-ohm source impedance; deliver 0dBm to +15dBm into 600-ohm loads. GATE CIRCUIT:Gating inhibits AGC ‘hunting’ and compression release during brief pauses in the input program. Extended program loss slowly returns circuit gains to resting values. AGC AMPLIFIER:Slow-AGC erases long-term program level variations for more consistent compression and limiting action. AGC may be independently defeated by grounding a rear-panel terminal. Correction range: ±12dB; correction rate: 0.5dB/sec. DYNAMIC REDUCTION:Compression and limiting share a common split-spectrum gain control circuit. The two functions are separated by a time-domain “floating platform” attack/release characteristic. Compression or total dynamic reduction may be independently defeated by grounding rear-panel terminals. SAFETY CLIPPER:Active only on limiter overshoots that would exceed 100% modulation. Conforms to pre-emphasis characteristic. LEVEL ALARM:Front-panel indicator flashes when AGC correction exceeds ±9dB, or when “dead air” exceeds 10 seconds. SIZE AND SHIPPING WEIGHT: 1- 3/4"H x 19"W x 8"D (1U); 12 lbs.

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