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INTRODUCTION
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Terminal Control API for network or localhost control and automation of all
I/O Mixer functions and Preset switching.
•
MS Windows Mixer API support in parallel to the existing Orban Mixer allows
standard Microsoft Windows audio applications to control Optimod PC's inputs
and outputs.
•
MS Windows Metering API so Windows applications using this API will display
audio levels. (Many broadcast playout systems use this.)
•
Serial port protocol allows Optimod-PC to be controlled either by ASCII serial
commands or by a serial-to–contact-closure device such as a Broadcast Tools SRC-
16.
•
Balanced analog monitor output with 24-bit D/A converter.
•
Precisely controls peak levels to prevent overmodulation or codec overload.
The peak limiter can be set up to control "flat" transmission channels or chan-
nels preemphasized at 50µs or 75µs.
•
Internal processing occurs at 48 kHz sample rate and 20 kHz audio bandwidth.
•
Two AES3 digital outputs at 32, 44.1, 48, 88.2, or 96 kHz sample rate. In v1.0
software, these emit identical signals.
•
OPTIMOD-PC controls the audio bandwidth as necessary to accommodate the
transmitted sample frequency, obviating the need for extra, overshooting anti-
aliasing filters in downstream equipment. OPTIMOD-PC's high frequency band-
width can be switched instantly (typically in 1 kHz increments) between 10.0 kHz
and 20 kHz. 20 kHz is used for highest-quality systems. 15 kHz meets the re-
quirements of the iBiquity® HD-AM system that use 44.1 kHz system input sam-
ple frequency. (15 kHz codec bandwidth may also help low bitrate lossy codecs
sound better than they do when fed full 20 kHz bandwidth audio.) 10 kHz
bandwidth meets the requirements of auxiliary DAB transmissions using a 24
kHz sample frequency.
•
Three Motorola DSPs do all the audio processing—there is no extra DSP load
on your computer's CPU.
•
Full coprocessing (independent of the CPU) means that audio will ordinarily
continue to pass through the card from its hardware inputs to its hardware out-
puts even if the host computer crashes. (Of course, WAVE inputs and outputs
will stop working because these are dependent on operating system services.)
•
OPTIMOD-PC ships with over twenty standard presets, which correspond to
different programming formats. These presets have already been tested and
field-proven in major-market radio netcasting, digital radio, and direct satellite
ORBAN MODEL 1101
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