Optimod-TV 8382

Orban

Digital Audio Processor for Television

The all-digital OPTIMOD-TV 8382 Audio Processor can help you achieve excellent audio quality and loudness consistency in analog television broadcasting that uses FM aural carriers with 75 µs or 50 µs pre-emphasis . Because all processing is performed by high-speed mathematical calculations within Motorola DSP56362 Digital Signal Processing chips, the processing has cleanliness, quality, and stability over time and temperature that is unmatched by analog processors.

Designed specifically for the demands of television audio, the programmable OPTIMOD-TV 8382 digital audio processor meets all requirements of the various mono, stereo and dual- language systems in use around the world. The 8382 controls program dynamics to maintain a comfortable range for the typical home viewer, and, using its built-in CBS Loudness Controller™, it tames subjective loudness to prevent commercials from becoming overly obtrusive.

OPTIMOD-TV 8382 is fully compatible with all monaural and stereo broadcast systems: BTSC, NICAM, EIAJ, and IEC dual carrier. In addition to its usual stereo mode, it can be operated in dual-mono mode to accommodate dual-language programming and it can switch between stereo and dual-mono modes without mutes or interruptions in the program.

Both analog and AES3 digital inputs and outputs are supplied standard; the digital I/O can accept and emit sample rates between 32 and 96 kHz and the output sample rate can be synchronized to the 8382's internal clock, to its digital input or to an AES11 signal appearing at its sync input. An internal stereo generator is not included; the 8382 is well matched to BTSC stereo generators from Orban (model 8185) and CRL (model TVS-3003).

The 8382 is remote controllable via eight programmable GPI ports, which can be used to recall presets and change operating modes. It is also equipped for remote control via RS232 serial or Ethernet ports, and it comes with a full-featured remote control application that runs on Microsoft Windows 2000 or XP. Finally, the 8382 features the ability to have its input AES3 "channel mode" bits determine its operating mode (stereo or dual-mono), and it can send this information to downstream equipment via the AES3 connection.

The 8382 can also be controlled via its built-in clock-based automation, which can be programmed to change presets and operating modes at preset times. The internal clock can be reset to the hour via GPI contact closure to ensure that it remains accurately synchronized with the facility's master clock.

If you wish to place level protection prior to your studio / transmitter link (STL), use an Orban studio level control system expressly designed for this purpose. (At the time of this writing, this is the Orban 8200ST OPTIMOD-Studio Compressor/limiter / HF Limiter / Clipper.) The 8200ST can be adjusted so that it substitutes for the broadband AGC circuitry in OPTIMOD-TV, which is then defeated.

Features

User-Friendly Interface

• An LCD and full-time LED meters make setup, adjustment and programming of OPTIMOD-TV easy — you can always see the metering while you're adjusting the processor. Navigation is by dedicated buttons, soft buttons (whose function is context-sensitive), and a large rotary knob. The LEDs show all metering functions of the processing structure (Two-Band or Five-Band) in use.
• Absolute Control of Peak Modulation
• The 8382 provides universal transmitter protection and audio processing for TV broadcast. It can be configured to interface ideally with any commonly found transmission system in the world, including EIAJ stereo, BTSC stereo, and dual-carrier.
• The 8382's dual-mono mode allows entirely separate mono programs to be processed, facilitating dual-language operation.
• The 8382 provides pre-emphasis limiting for the two standard pre-emphasis curves of 50 ms and 75 ms. Its pre-emphasis control is seldom audibly apparent, producing a clean, open sound with subjective brightness matching the original program. (For AM aural carriers without pre-emphasis, we recommend Orban's Optimod-DTV 6200 processor, which also includes a CBS Loudness Controller.)
• The 8382 achieves extremely tight peak control at all its outputs — analog left/right and AES/EBU left/right.
• The 8382 prevents aliasing distortion in subsequent stereo encoders or transmission links by providing bandwidth-limiting and overshoot-compensated 15 kHz low-pass filters ahead of the 8382's audio outputs and stereo encoder.
• Anti-aliased clippers running at 256 kHz sample rate prevent any trace of "digital clipper" sound.

Flexible Configuration

• The 8382 includes analog and AES/EBU digital inputs and outputs. Both digital input and digital output are equipped with sample-rate converters and can operate 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 ohm instrumentation-amplifier circuits, and the analog outputs are transformerless balanced, and floating (with 50 ohm 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 processing 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 computations made by Digital Signal Processing (DSP) chips.
• The 8382 features two processing structures: Five-Band for a spectrally consistent 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 processors. The Five-Band and the Two-Band structures can be switched via a mute-free crossfade
• The 8382 rides gain over an adjustable range of up to 25dB, compressing dynamic range and compensating for both operator gain-riding errors and gain inconsistencies in automated systems.
• The 8382's Two-Band processing structure is phase-linear to maximize audible transparency.
• The 8382 uses Orban's next-generation look-ahead technology to achieve outstandingly clean speech reproduction.
  

Controllable

• The 8382 can be remote-controlled by 5-12V pulses applied to eight programmable, optically isolated "general-purpose interface" (GPI) ports.
• 8382PC Remote software is a highly graphical application that runs under Windows 2000 and XP.
• It communicates with a given 8382 via TCP/IP over modem, direct serial, and Ethernet connections. You can configure PC Remote to switch between many 8382s via a convenient organizer that supports giving any 8382 an alias and grouping multiple 8382s into folders. Clicking an 8382's icon causes PC Remote to connect to that 8382 through an Ethernet network, or initiates a Windows Dial-Up or Direct Cable Connection if appropriate. The PC Remote software allows the user to access all 8382 features (including advanced controls not available from the 8382's front panel), and allows the user to archive and restore presets, automation lists, and system setups (containing I/O levels, digital word lengths, GPI functional assignments, etc.).
• OPTIMOD-TV contains a versatile real-time clock, which allows automation of various events (including recalling presets) at pre-programmed times.
• A Bypass Test Mode can be invoked locally, by remote control (from either the 8382's GPI port or the 8382 PC Remote application), or by automation to permit broadcast system test and alignment or "proof of performance" tests.
• OPTIMOD-TV contains a built-in line-up tone generator, facilitating quick and accurate level setting in any system.
• OPTIMOD-TV's software can be upgraded by running Orban-supplied downloadable upgrade software on a PC. The upgrade can occur remotely through the 8382's Ethernet port or serial port (connected to an external modem), or locally (by connecting a Microsoft Windows® computer to the 8382's serial port through the supplied null modem cable).
  
  

Technical Specifications:

It is impossible to characterize the listening quality of even the simplest limiter or compressor on the basis of the usual specifications, because such specifications cannot adequately describe the crucial dynamic processes that occur under program conditions. Therefore, the only way to meaningfully evaluate the sound of an audio processor is by subjective listening tests.

Certain specifications are presented here to assure the engineer that they are reasonable, to help plan the installation, and to help make certain comparisons with other processing equipment.

Some of the specifications are for features that are optional or may not yet be available at the time you place your order. Consult the current price list for details.

PERFORMANCE

Specifications apply for measurements from analog left/right input to stereo composite output and to TV analog left/right output.

Frequency Response (Bypass Mode): Follows standard 50 µs or 75 µs pre-emphasis curve ±0.10 dB, 2.0 Hz–15 kHz. Analog left/right output and digital output can be user-configured for flat or pre-emphasized output.

Noise: Output noise floor will depend upon how much gain the processor is set for (Limit Drive, AGC Drive, Two-Band Drive, and / or Multiband Drive), gating level, equalization, noise reduction, etc. The dynamic range of the A/D Converter, which has a specified overload-to–noise ratio of 110 dB, primarily governs it. The dynamic range of the digital signal processing is 144 dB.

Total System Distortion (de-emphasized, 100% modulation): <0.01% THD, 20 Hz–1 kHz, rising to <0.05% at 15 kHz. <0.02% SMPTE IM Distortion.

Total System L / R Channel Separation: >80 dB, 20 Hz – 15 kHz; 90 dB typical.

Polarity (Two-Band and Bypass Modes): Absolute polarity maintained. Positive-going signal on input will result in positive-going signal on output.

Processing Sample Rate: The 8382 is a "multirate" system, using internal rates from 32 kHz to 512 kHz as appropriate for the processing being performed. Audio clippers operate at 256 kHz and are anti-aliased.

Processing Resolution: Internal processing has 24 bit (fixed point) or higher resolution; uses Motorola DSP56362 DSP chips.

Delay: The minimum available input / output delay is approximately 20 ms, as determined by the advanced "look-ahead" processing algorithms employed. This can be padded to exactly one frame of 24, 25, 29.97, or 30 frames / second video.

Operating mode: Stereo or dual-mono. In dual-mono mode, both processing channels have the same subjective adjustments (as determined by the active preset) but are otherwise independent, making this mode appropriate for dual-language transmissions.

INSTALLATION

Analog Audio Input

Configuration: Stereo / Dual-Mono.

Impedance: >10k ohm load impedance, electronically balanced.*

Nominal Input Level: Software adjustable from –4.0 to +13.0 dBu (VU).

Maximum Input Level: +27 dBu.

Connectors: Two XLR-type, female, EMI-suppressed. Pin 1 chassis ground, Pins 2 (+) and 3 electronically balanced, floating and symmetrical.

A/D Conversion: 24 bit 128x oversampled delta sigma converter with linear-phase anti-aliasing filter. Converter outputs 64 kHz sample rate, which the 8382 then decimates to 32 kHz in DSP using an ultra-high-quality image-free synchronous sample rate converter.

Filtering: RFI filtered, with high-pass filter at 0.15 Hz (–3 dB).

Analog Audio Output

Configuration: Stereo. Flat or pre-emphasized (at 50 µs or 75 µs), software-selectable.

Source Impedance: 50 ohms, electronically balanced and floating.

Load Impedance: 600 ohms or greater, balanced or unbalanced. Termination not required or recommended.

Output Level (100% peak modulation): Adjustable from –6 dBu to +24 dBu peak, into 600 ohms or greater load, software-adjustable.

Signal-to-Noise: >= 90 dB unweighted (Bypass mode, de-emphasized, 20 Hz–15 kHz bandwidth, referenced to 100% modulation).

L / R Crosstalk: <= –70 dB, 20 Hz–15 kHz.

Distortion: <= 0.01% THD (Bypass mode, de-emphasized) 20 Hz–15 kHz bandwidth.

Connectors: Two XLR-type, male, EMI-suppressed. Pin 1 chassis ground, Pins 2 (+) and 3 electronically balanced, floating and symmetrical.

D/A Conversion: 24 bit 128x oversampled.

Filtering: RFI filtered.

Digital Audio Input

Configuration: Stereo or Two-Channel (dual-mono) per AES3 standard, 24 bit resolution, software selection of stereo or dual-mono. Unit can detect Stereo or Two-Channel status bits and switch modes appropriately.

Sampling Rate: 32, 44.1, 48, 88.2, or 96 kHz, automatically selected.

Connector: XLR-type, female, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3 transformer balanced and floating, 110 ohm impedance.

Input Reference Level: Variable within the range of –30 dBFS to –10 dBFS.

J.17 De-emphasis: Software-selectable.

Filtering: RFI filtered.

Digital Audio Output

Configuration: Stereo or Two-Channel per AES3 standard. Output configured in software as flat or pre-emphasized to the chosen processing pre-emphasis (50 µs or 75 µs), with or without J.17 pre-emphasis.

Sample Rate: Internal free running at 32, 44.1, 48, 88.1 or 96 kHz, selected in software. Can also be synced to the AES/EBU digital input at 32, 44.1, 48, 88.1 or 96 kHz, as configured in software.

Word Length: Software selected for 24, 20, 18, 16 or 14-bit resolution. First-order highpass noise-shaped dither can be optionally added, Dither level automatically adjusted appropriately for the word length.

Connector: XLR-type, male, EMI-suppressed. Pin 1 chassis ground, pins 2 and 3 transformer balanced and floating, 110 ohm impedance.

Output Level (100% peak modulation): –20.0 to 0.0 dBFS software controlled.

Filtering: RFI filtered.

Remote Computer Interface

Configuration: TCP/IP protocol via direct cable connect, modem, or Ethernet interface. Suitable null modem cable for direct connect is supplied. Modem is not supplied.

Serial Port: 115 kbps RS–232 port dB–9 male, EMI-suppressed.

Ethernet Port: 10/100 Mbit/sec on RJ45 female connector.

Remote Control (GPI) Interface

Configuration: Eight (8) inputs, opto-isolated and floating.

Voltage: 6–15V AC or DC, momentary or continuous. 9VDC provided to facilitate use with contact closure.

Connector: dB–25 male, EMI-suppressed.

Control: User-programmable for any eight of user presets, factory presets, bypass, test tone, stereo or mono modes, analog input, digital input.

Filtering: RFI filtered.

POWER

Voltage: 100–132 VAC or 200–264 VAC, switch-selected on the rear panel, 50–60 Hz, 40 VA.

Connector: IEC, EMI-suppressed. Detachable 3-wire power cord supplied.

Grounding: Circuit ground is independent of chassis ground, and can be isolated or connected with a rear panel switch.

Safety Standards: ETL listed to UL standards, CE marked.

ENVIRONMENTAL

Operating Temperature: 32 ° to 122 ° F / 0 ° to 50 ° C for all operating voltage ranges.

Humidity: 0–95% RH, non-condensing.

Dimensions (W x H x D): 19" x 3.5" x 14.25" / 48.3 cm x 8.9 cm x 36.2 cm. Two rack units high.

Humidity: 0–95% RH, non-condensing.

RFI / EMI: Tested according to Cenelec procedures. FCC Part 15 Class A device.

Shipping Weight: 19 lbs / 8.7 kg

WARRANTY

Two Years, Parts and Service: Subject to the limitations set forth in Orban's Standard Warranty Agreement.

Because engineering improvements are ongoing, specifications are subject to change without notice.

* No jumper selection available for 600 ohm. Through-hole pads are available on I/O module for user-installed 600 ohm termination.

Note: Specifications are subject to change without notice

Download Product Brochure (1,820 KB) Optimod-TV 8382