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Inovonics 223 - Multimode Audio Processor
Inovonics’ INOmini 223 is an audio processing powerhouse in a deceptively small package. Its versatile DSP-based design is userprogrammable to serve multiple broadcast applications without compromising any single one. The unit addresses the needs of NRSC-compliant AM broadcasting with a range of cutoff frequencies, TIS (Traveler’s Information Service) advisories, monaural LPFM transmission, and analog SCA subcarriers. A full-range ‘Studio’ mode satisfies mic processing and general production needs. The INOmini 223 features gated and windowed gain-riding AGC, 3 bands of adjustable dynamic range compression with selectable crossovers and variable EQ, and tight ‘lookahead’ peak control. Pre-emphasis, with its own protection limiting, and overshootcontrolled output filtering are individually and specifically tailored to the service selected.
Ideal for: US/NRSC AM, Worldwide AM, Shortwave, US/Euro Monaural FM, TIS, and analog SCA.
Easy menu / jog-wheel setup from the front panel.
Performs AGC, 3-Band Compression, Peak Control, and Output Filtering specific to the selected application.
User-adjustable compression, EQ, limiting, and program density.
DSP ‘lookahead’ limiting offers tight peak control without clipping.
USB connector enables fast firmware updates in the field.
Operating Modes: NRSC-compliant asymmetrical AM processing with 10kHz, 9kHz, 7kHz, and 5kHz (9-pole Cauer) cutoffs. TIS asymmetrical AM processing with 5kHz (9-pole Cauer) cutoff. FM processing (monaural) with 75μs/50μs pre-emphasis and 15kHz (7-pole Cauer) cutoff. SCA processing with smooth 5kHz (6th order Butterworth) cutoff.
Frequency Response: 20Hz – 20kHz, ±0.1dB in PROOF and Studio modes; all specialized applications conform to specified cutoff characteristics.
Distortion: 0.02% THD in PROOF mode.
Signal-to-Noise: Better than 72dB below the limited ceiling level measured through an appropriate de-emphasis network.b>
Program Line Input: Active-balanced (XLR) analog input, accepts nominal line levels between –20dBu and +20dBu.
Program Line Output: Active-balanced (XLR) delivers output levels between –15dBu and +12dBu corresponding to 100% modulation; 200-ohm resistive source. A switch under the top cover inserts a 20dB pad in the output for transmitters requiring a low level input.
Latency: 3.5ms – 4.5ms, depending on selected application.
Headphone Jack: Front-panel (TRS) 3.5mm.
USB Port: Front-panel connection for firmware updates.