Orban Optimod-TV 8382, Operating Manual

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OPTIMOD-TV DIGITAL INTRODUCTION
1-3
Flexible Configuration

The 8382 includes analog and AES3 digital inputs and outputs. Both digital in-
put and digital output are equipped with sample-rate converters and can oper-
ate at 32 kHz, 44.1 kHz, 48, 88.2, and 96 kHz sample rates. The pre-emphasis
status and output levels are separately adjustable for the analog and digital
outputs.

The analog inputs are transformerless, balanced 10k

instrumentation-
amplifier circuits , and the analog outputs are transformerless, balanced, and
floating (with 50

impedance) to ensure highest transparency and accurate
pulse response.

The 8382 precisely controls the audio bandwidth to 15 kHz. This prevents
overshoots in uncompressed digital links operating at a 32 kHz-sample rate and
prevents interference to the pilot tone and RDS (or RBDS) subcarrier. Because
the stopband of these filters begins at 16 kHz, they are well matched to BTSC
stereo generators—the stereo generator will need to remove very little energy
to protect the pilot tone, minimizing peak modulation overshoot.

All input, output, and power connections are rigorously RFI-suppressed to
Orban’s traditional exacting standards, ensuring trouble-free installation.

The 8382 is designed and certified to meet all applicable international
safety and emissions standards .
Adaptability through Multiple Audio Processing Structures

A processing structure is a program that operates as a complete audio proc-
essing system. Only one processing structure can be on-air at a time. OPTIMOD-
TV realizes its processing structures as a series of high-speed mathematical com-
putations made by Digital Signal Processing (DSP) chips.

The 8382 features two processing structures: Five-Band for a spectrally consis-
tent sound with good loudness control, and Two-Band with CBS Loudness
Controller for a transparent sound that preserves the frequency balance of the
original program material while also effectively controlling subjective loudness.
The CBS Loudness Controller is not needed with the Five-Band processing
because its spectral consistency creates consistent loudness as a desirable
byproduct.

A special Two-Band preset creates a no-compromise “Protect” function that is
functionally similar to the “
Protect ” structures in earlier Orban digital proces-
sors. The Five-Band and the Two-Band structures can be switched via a mute-free
crossfade