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3
Section I
INTRODUCTION
MODEL 716 PRODUCT DESCRIPTION
General
Inovonics introduced the first “
DAVID
” (as in David vs. Goliath) FM-
Stereo Processor/Generator in 1992. The original Model 715 was the
hallmark of simplicity, and was intended to answer the more basic of
FM radio broadcasting needs.
The “
DAVID-II
,” Model 716, includes a redesigned pulse-width-
modulation audio processing section. This improved processing
circuitry extends the applicability of the
DAVID-II
into broadcast
environments where perceived loudness and modulation density are
considered germane to the broadcaster’s success.
Features
Features of the Inovonics
DAVID-II
include:
•
Comprehensive stereo audio processing: slow, “gain-
riding” AGC — Wideband Compression and Peak
Limiting — Independent High Frequency Limiting.
•
Exclusive “Bass Enhance” equalizer (defeatable).
•
Extended-response low-pass filtering with proprietary
overshoot compensation.
•
Digital synthesis of pilot and subcarrier for unexcelled
performance and freedom from drift and routine
adjustment.
•
Internal combining for RDS or SCA subcarriers.
•
Built-in, adjustable Composite Processor.
MODEL 716 TECHNICAL SPECIFICATIONS
Frequency Response
(through
appropriate de-emphasis network)
:
±0.5dB, 20Hz–15kHz; –1dB or
less at 16kHz, –60dB or better at
19kHz.
Stereo Separation
(L
à
R or R
à
L)
:
Processing OUT: >65dB,
20Hz–16kHz.
Processing IN: >60dB,
20Hz–16kHz.
Distortion
(with full Compression,
1dB below 100% modulation)
:
<0.25% THD in demodulated
audio above 200Hz.
Noise:
Better than 80dB below 100%
modulation in demodulated audio,
20Hz–16kHz. 38kHz residual and
“digital” noise above 54kHz,
–70dB or better.
