The new third-generation Inovonics David broadcast audio processor delivers more for less, with bigger, bolder, brighter sound. Inovonics introduced the first DAVID (as in David vs. Goliath) in 1992 to meet the more basic needs of FM broadcasters. The multiband DAVID-III has been designed from the ground up to compete with today's aggressive processing systems at a fraction of their cost. The Inovonics 718 DAVID-III combines comprehensive multiband audio processing with a digital-synthesis stereo generator for unexcelled performance and great value. Pulse-width-modulation (PWM) techniques ensure rock-stable operation and a very competitive sound. Density and equalization adjustments allow the broadcaster to tailor the 'signature' of the on-air sound. Proprietary final limiting and an adjustable composite clipper guarantee full carrier modulation for any program audio source or characteristic.
•Third-generation DAVID processing
•FM processor/generator •Easy to install and use without the need for external test equipment
•3-band feed forward Pulse-Width-Modulation (PWM)
•Gated-AGC (Automatic Gain Control)
•PIPP (Polarity Independent Peak Processing) limiter and a built-in adjustable composite clipper
•Digital synthesis of the multiplex baseband signal
•FREQUENCY RESPONSE: ±0.5dB, 20Hz-15kHz •STEREO SEPARATION: >55dB, 50Hz-15kHz (typically 60-70dB)
•NOISE: Better than 70dB below 100% modulation in decoded L/R audio. Individual digital noise components above 54kHz are –70dB or better.
•DISTORTION: <0.5%THD in baseband and subcarrier at 95% modulation with PIPP* limiter defeated; <1.5% at any level of modulation with PIPP* limiter engaged.
•CROSSTALK (M/S or S/M): Nonlinear crosstalk is better than –50dB, 50Hz-15kHz. Linear crosstalk (through processing and filters) is better than –40dB.
•PRE-EMPHASIS: 75μs or 50μs selected by internal jumpers.
•PIPP* LIMITER: (*Polarity Independent Peak Processing) Proprietary circuitry assures full carrier deviation by program audio regardless of signal asymmetry. The limiter may be defeated with a front-panel switch.
•LOW-PASS FILTERING: The 7-pole, phase-corrected, active-elliptic LPF includes proprietary overshoot compensation.
•COMPOSITE CLIPPER: Baseband clipping may be adjusted between 0dB and 3dB. Clipping is performed prior to pilot injection.
•STEREO PILOT: 19kHz, ±1Hz. Pilot is adjustable between 6% and 12% relative to 100% modulation.
•DIGITAL SYNTHESIS SAMPLING RATE: 608kHz (16X subcarrier oversampling)
•COMPOSITE OUTPUT: The 75-ohm, unbalanced BNC output is variable between 1V p-p and 10V p-p with reference to 100% carrier modulation.
•POWER REQUIREMENTS: 105-130VAC and 210-260VAC; 50/60Hz; 20W.
•SIZE AND SHIPPING WEIGHT: 23” x 16” x 2” (2U); 8 lbs/584mm x 406mm x 51mm ; 3.6 kg