1-2
INTRODUCTION
ORBAN MODEL 6300
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.
User-Friendly Interface
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.
Absolute Control of Peak Modulation
The 6300
precisely
controls peak levels
to prevent overmodulation. The
maximum level of the digital samples is controlled to better than 2%.
While
primarily oriented toward “flat” media
, the 6300 can also provide
preemphasis limiting
for the two standard preemphasis curves of 50
s and
75
s. This allows it to protect pre-emphasized microwave links, satellite uplinks
and similar channels where protection limiting or light processing is required.
Because its processing is configured to be most effective with “flat me-
dia,” the 6300 cannot provide extreme loudness for pre-emphasized ra-
dio channels. Use one of Orban’s Optimod-FM processors for this applica-
tion. For analog television with FM aural carrier(s), use Optimod-TV 8382.
Flexible Configuration
The 6300 includes
analog
and
dual
AES3 digital
inputs and outputs. The digi-
tal input and digital outputs have sample-rate converters and can operate at 32
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