Specifications
It is impossible to characterize the listening quality of even the simplest limiter or compressor based on specifications, because such specifications cannot adequately describe the crucial dynamic processes that occur under program conditions. Therefore, the only way to evaluate the sound of an audio processor meaningfully is by subjective listening tests.
Certain specifications are presented here to assure the engineer that they are reasonable, to help plan the installation, and make certain comparisons with other processing equipment.
Performance
Specifications apply for measurements from analog left/right input to analog left/right output.
Frequency Response (Bypass Mode): Depending on settings, is flat or follows standard 50µs or 75µs preemphasis curve ±0.10 dB, 20 Hz-20 kHz. (At 32 kHz input sample rate, the passband is reduced to approximately 14.7 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 20 kHz. <0.02% SMPTE IM Distortion.
Polarity (Two-Band and Bypass Modes): Absolute polarity maintained. Positive-going signal on input will result in positive-going signal on output.
Processing Resolution: Internal processing has 24 bit (fixed point) or higher resolution; uses four 150 MHz Motorola DSP56367 DSP chips. All equalizers and crossovers use double-precision arithmetic to achieve mastering-quality processing.
Internal Processing Sample Rate: 48 kHz. Although this rate is not currently fashionable, we believe that it is optimum, pro-audio marketing spin to the contrary. No bias-controlled listening tests (i.e., double-blind with matched levels) have demonstrated that humans can hear the difference between 48 kHz and higher sample rates. Meanwhile, the double-precision equalizers and crossover filters used throughout the 6300 produce at least 6 dB lower noise and nonlinear distortion than they would at 96 kHz.
Delay: The minimum available input/output delay is approximately 23 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 and can also be adjusted in 1 ms intervals up to 60 ms. The input/output delay to the Headphone Monitor output is approximately 5 ms. (This output has no peak limiting applied to it.)
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 processing.
Installation
Analog Audio Input
Configuration: Stereo / Dual-Mono.
Impedance: >10kΩ 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.
Filtering: RFI filtered, with high-pass filter at 0.15 Hz (-3 dB).
Analog Audio Output
Configuration: Stereo. Flat or pre-emphasized (at 50µs or 75µs), software-selectable.
Source Impedance: 50Ω, electronically balanced and floating.
Load Impedance: 600Ω or greater, balanced or unbalanced. Termination not required or recommended.
Output Level (100% peak modulation): Adjustable from -6 dBu to +24 dBu peak, into 600Ω 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, 110Ω impedance.
Input Reference Level: Variable within the range of -30 dBFS to -10 dBFS.
J.17 Deemphasis: 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 preemphasis (50µs or 75µs), with or without J.17 preemphasis.
Sample Rate: Internal free running at 32, 44.1, 48, 88.1 or 96 kHz, selected in software. Can be synced at 32, 44.1, 48, 88.1 or 96 kHz to 1x wordclock or AES11id applied to the Sync input or to AES3 or AES11 signals applied to the AES3 digital input.. (Passband is limited to approximately 14.7 kHz when using 32 kHz output sample rate.)
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, 110Ω impedance.
Output Level (100% peak modulation): -20.0 to 0.0 dBFS software controlled.
Filtering: RFI filtered.
Sync Input
Configuration: Can accept wordclock or AES11id (75Ω) sync, selectable in software.
Connector: Female BNC.
Termination: Unterminated. For wordclock, use an external 75Ω terminator if the 6300 is the last item in the chain. For AES11id, always use a 75Ω terminator.
Remote Computer Interface
Configuration: TCP/IP protocol via direct serial cable connect, modem, or Ethernet interface. Modem is not supplied.
Serial Port: 115 kbps RS-232 port dB-9 male, EMI-suppressed.
Ethernet Port: 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: 100-264 VAC, 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: 32º to 122º F / 0º to 50º C for all operating voltage ranges.
Humidity: 0-95% RH, non-condensing.
Dimensions (W x H x D): 19" x 1.75 " x 14.25" / 48.3 cm x 4.4 cm x 36.2 cm. 1RU.
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.