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1-4
INTRODUCTION
User-Friendly Interface
Absolute Control of Loudness and Peak Modulation
Take a little time now to familiarize yourself with OPTIMOD 6300. A small invest-
ment of your time now will yield large dividends in audio quality.
The rest of Chapter 1 explains how OPTIMOD 6300 fits into the DAB and DTV broad-
cast plants and how to use it for netcasting. Chapter 2 explains how to install it.
Chapter 3 explains how to operate OPTIMOD 6300. Chapters 4 through 6 provide
reference information.
OPTIMOD 6300 was designed to deliver a high quality sound while simultaneously
increasing the average modulation of the channel substantially beyond that achiev-
able by "recording studio"-style compressors and limiters. Because such processing
can exaggerate flaws in the source material, it is very important that the source
audio be as clean as possible.
For best results, feed OPTIMOD 6300 unprocessed audio. No other audio proc-
essing is necessary or desirable.
If you wish to place level protection prior to your studio/transmitter link (STL), use
OPTIMOD-PC 1100V2 or another 6300. Either of these can substitute for the broad-
band AGC circuitry in OPTIMOD 6300, which is then defeated.
An LCD and full-time LED meters make setup, adjustment and programming
of OPTIMOD 6300 easy—you can always see the metering while you are adjust-
ing the processor. Navigation is by dedicated buttons, soft buttons (whose func-
tion is context-sensitive), and a large rotary knob. The LEDs show all metering
functions of the processing structure (2-band or 5-band) in use.
Push one of the dedicated buttons to "Recall" a preset, to "Modify" processing,
or to access the system's Setup controls.
The 6300 includes third-generation CBS Loudness Controllers™ for DTV appli-
cations. Loudness controllers work with the both Two-Band and Five-Band
structures. The third-generation improvements reduce annoyance more
than simple loudness control alone, doing so without audible gain pumping.
Attack time is fast enough to prevent audible loudness overshoots, so the con-
trol is smooth and unobtrusive. Material processed by the CBS Loudness Control-
ler has been shown to be well controlled when measured with a long-term
loudness meter using the ITU-R BS.1770-2 standard. The 6300 also includes a
"BS.1770 Safety Limiter" that follows the CBS Loudness Controller; use the
BS.1770 if the BS.1770-2 meter reading must be constrained to a preset value.
See BS.1770 Safety Limiter on page 3-13 and Using the ITU BS.1770 and CBS
Loudness Meters to Measure Loudness Controller Performance starting on page
3-79 for a discussion of why we included this limiter.
ORBAN MODEL 6300
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Table of Contents
Troubleshooting
