Orban OPTIMOD-FM 5518, Operating Manual

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5518-FM DIGITAL INTRODUCTION
1-1
Section 1
Introduction
About this Manual
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The 5518 FM Stereo Encoder
Orban’s all-digital 5518 FM Stereo Encoder is a high-quality stand-alone stereo en-
coder that operates at 64 kHz to 512 kHz sample rates and offers lowpass filtering,
overshoot limiting, composite limiting, diversity delay, and an ITU412 multiplex
power controller. The 5518 must be driven (usually via an STL) by a full-featured FM
audio processor (like Orban’s 8600) that incorporates preemphasis-aware HF limiting
and peak control.
Take a little time now to familiarize yourself with the 5518. A small investment of
your time now will yield large dividends in audio quality.
The rest of Section 1 explains how the 5518 fits into the FM broadcast facility. Sec-
tion 2 explains how to install it and set it up. Section 3 tells how to operate the
5518. Sections 4 through 6 provide reference information.
Flexible Configuration

There are two composite outputs with independent level controls , each
capable of driving 7

in parallel with 47,000pF, (100ft/30m of coaxial cable). In
addition, the overshoot-limited left/right domain audio appears at the 5518’s
analog and AES3 digital outputs.