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Digital Audio Processor with Stereo Encoder
Orban's Optimod-FM 2200 has become renowned in the broadcast industry for delivering that big Optimod sound at a slimmed-down price. The new Optimod-FM 2300 builds on the 2200's sound, adding stereo enhancement, more powerful equalization, anti-aliased clipping, composite limiting, and full remote control facilities. AES/EBU digital input and output is now standard, as is clock-based automation. Switching between "Two-Band Normal" and "Two-Band Purist" processing is now gap-free.
With the 2300, your signature sound is just a preset away. An easy, one-knob Less/More adjustment allows you to customize any factory preset, trading cleanliness against processing artifacts according to the requirements of your market and competitive environment. Full Control gives you the versatility to customize your audio further.
This versatility makes the 2300 work well with any format. The 2300's optimized technology ensures unusually high average modulation and coverage for a given level of subjective quality.
The compact 1U form factor makes the 2300 at home in any rack, and its solid, competitive sound makes it an ideal choice for medium and small market stations, non-commercial and educational stations, and any other broadcasters whose aspirations exceed their budgets.
The 2300 is also the ideal choice for network broadcasters who process with Orban's flagship Optimod-FM 8400 at the network origination point and who need a processor at every transmitter to eliminate STL overshoots or to process local insertions. The 2300's superb stereo encoder and composite limiter help deliver a transmitted signal that's always immaculately clean and perfectly peak limited, with full protection of subcarriers and RDS/RBDS regardless of the amount of composite limiting.
The built-in ITU 412 multiplex power controller means that the 2300's output meets even the most stringent European government regulations. In addition, strict 16 kHz band limiting ensures that the peak-limited left and right outputs can pass through 32 kHz uncompressed digital STLs without added overshoot—there is no need to use STLs having 44.1 or 48 kHz sample rates.
Like its predecessor, the 2300 is remote controllable via eight programmable GPI ports. However, unlike its processor, the 2300 is equipped for remote control via RS232 serial or Ethernet ports, and comes with a full-featured remote control application that runs on Microsoft Windows 2000 or XP.
If you're concerned about latency because you need to feed live talent headphones off air, you'll be pleased to know that the 2300's processing has only about 5 ms delay, which will keep talent happy.
Technical Specifications:
PERFORMANCE
Specifications apply for measurements from analog Left/Right input to stereo composite output and to FM 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 Multi-Band 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: >50 dB, 20 Hz – 15 kHz; 60 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 2300 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), while the composite limiter operates at 512 kHz.
Processing Resolution: Internal processing has 24 bit (fixed point) or higher resolution; uses Motorola DSP56362 DSP chips.
INSTALLATION
Analog Audio Input
Configuration: Stereo.
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 2300 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 per AES/EBU standard, 24 bit resolution, software selection of stereo, mono from left, mono from right or mono from sum.
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 –30 dBFS to –10 dBFS.
J.17 De-emphasis: Software-selectable.
Filtering: RFI filtered.
Digital Audio Output
Configuration: Stereo per AES/EBU 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.
Composite Baseband Output
Configuration: Two outputs, each with an independent software-controlled output level control, output amplifier and connector.
Source Impedance: 0 ohm voltage source or 75 ohm, jumper-selectable. Single-ended, floating over chassis ground.
Load Impedance: 37 ohm or greater. Termination not required or recommended.
Maximum Output Level: +12.0 dBu (8.72 Vp-p).
Minimum Output Level: –12 dBu (0.55 Vp-p) for 0.5 dB adjustment resolution.
Pilot Level: Adjustable from 6.0% to 12.0%, software controlled.
Pilot Stability: 19 kHz, ±0.5 Hz (10 degrees to 40 degrees C).
D/A Conversion: 24-bit
Signal-to-Noise Ratio: <= –85 dB (Bypass mode, de-emphasized, 20 Hz – 15 kHz bandwidth, referenced to 100% modulation, unweighted).
Distortion: <= 0.02% THD (Bypass mode, de-emphasized, 20 Hz – 15 kHz bandwidth, referenced to 100% modulation, unweighted).
Stereo Separation: At 100% modulation = 3.5Vp-p, > 60 dB, 30 Hz - 15 kHz. At 100% modulation = 1.0 - 8.0 Vp-p, > 55 dB, 30 Hz - 15 kHz.
Crosstalk-Linear: <= –80 dB, main channel to sub-channel or sub-channel to main channel (referenced to 100% modulation).
Crosstalk-Non-Linear: <= –80 dB, main channel to sub-channel or sub-channel to main channel (referenced to 100% modulation).
38 kHz Suppression: >= 70 dB (referenced to 100% modulation).
76 kHz & Sideband Suppression: >= 80 dB (referenced to 100% modulation).
Pilot Protection: –60 dB relative to 9% pilot injection, ±250 Hz (up to 2 dB composite processing drive).
Subcarrier Protection (60-100 kHz): >= 70 dB (referenced to 100% modulation; with up to 2 dB composite limiting drive; measured with 800 line FFT analyzer using "maximum peak hold" display).
57 kHz (RDS / RBDS) Protection: –50 dB relative to 4% subcarrier injection, ±2.0 kHz (up to 2 dB composite processing drive).
Connectors: Two BNC, floating over chassis ground, EMI suppressed.
Maximum Load Capacitance: 0.047 µf (0 ohm source impedance). Maximum cable length of 100 feet / 30 meters RG–58A / U.
Filtering: RFI filtered.
Subcarrier (SCA) Inputs
Configuration: Subcarrier inputs sum into composite baseband outputs before digitally controlled composite attenuator.
Impedance: >600 ohms
SCA1 Sensitivity: Variable from 220 mV p-p to >10 V p-p to produce 10% injection. Sensitivity is adjustable by an internal PC-board-mounted trim pot.
SCA2 Sensitivity: Fixed at 772 mV p-p to produce 10% injection.
Connectors: Two BNC, unbalanced and floating over chassis ground, EMI suppressed.
19 kHz Pilot Reference: SCA2 input can be re-jumpered to provide a 19 kHz pilot reference output.
Remote Computer Interface
Configuration: TCP/IP protocol via direct cable connect, modem, or Ethernet interface.
Serial Port: 115 kbps RS–232 port dB–9 male, EMI-suppressed.
Ethernet Port: 10 or 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 1.875" x 14.25" / 48.3 cm x 4.8 cm x 36.2 cm. One rack unit 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
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