Specifications
SYSTEM
Frequency Response: ±0.1dB, 2-20,000Hz (Bypass mode).
Internal Filters: (4.0 to 11.5kHz in 500Hz steps), 12, 13, 14, 15,
20kHz provide anti-aliasing for any sample-rate and bit-rate combination.
Internal Sample Rate: 48kHz.
Internal Resolution: 24-bit fixed point (Motorola DSP56009).
Input/Output Resolution: 20-bit, limited by Analog Devices sample
rate converters.
Peak Control Accuracy: If output samples are synchronous with internal
samples, maximum overshoot of any output sample is 0.1dB. This is true at
48kHz output sample rate. If sample rate conversion after internal processing
makes output samples asynchronous with internal samples, output samples
can overshoot as much as 1dB (0.3dB typical).
Phase Response: All processing is linear-phase (constant group delay).
Internal Processing: Input -> Two-Band defeatable AGC -> Four-Band
Equalizer -> Multiband Compressor -> Look-ahead Limiter -> Output.
Processing Structures: Three available: Five-Band, Two-Band, and
Protect, selectable by mute-free crossfade.
Equalizers: 4 Eq. sections; Shelving Low Bass Eq.; Shelving Mid bass
Eq.; bands Parametric Midrange Eq.; and High Frequency Eq.
Number of Factory Presets: 26, each with 19-step LESS-MORE control.
Presets are fully customizable with FULL CONTROL.
Number of User Presets: 32 memory locations to save customized presets.
ANALOG AUDIO INPUT
Configuration: Stereo.
Impedance: Electronically balanced 600 ohms or <10k ohms impedance,
selected using a configuration jumper.
Nominal Input Level: Software adjustable (via AI REF control) -9
dBu to +13 dBu VU (-1 dbu to +21 dBu PPM).
Maximum Input Level: +27 dBu, peak.
Connector: Two XLR-type, female, EMI-suppressed. Pin 1 chassis ground,
Pins 2 (+) and 3 electronically balanced, floating and symmetrical.
AD Conversion: 24-bit 128X oversampled delta sigma A/D converter
with linear phase anti-aliasing filter.
RF Filtering: Effective 0.5-1000MHz.
High Pass Filter: 0.15Hz.
ANALOG AUDIO OUTPUT (MONITOR)
Note that this output is not intended to be used as a transmitter output, rather it is for monitoring. Nevertheless it has been designed for low noise, distortion, and overshoot and can drive an STL or transmitter in an analog plant. Peak control will not be as good as at the digital output because on-air samples will be asynchronous with peak-controlled internal samples. The source of this output is switchable between the peak limiter output and the multiband compressor output. Because most of the delay occurs in the peak limiter, this can make headphone monitoring much more comfortable for on-air talent.
Configuration: Stereo.
Source Impedance: 30 ohms, electronically balanced and floating.
Load Impedance: 600 ohms or greater, balanced or unbalanced. Termination
not required or recommended.
Output Level: Fixed at +14 dBu peak, with MON OUT source set to "POST
LIMiter." Pre-limiter peaks up to +26 dBu possible. No output level
adjustment control provided.
Signal-to-Noise: 90 dB unweighted signal-to-noise, 20Hz-20kHz (bypass
mode).
Distortion: £0.01% THD (bypass mode), 20Hz-20kHz.
Connector: Two XLR-type, male, EMI-suppressed. Pin 1 chassis ground,
Pins 2 (+) and 3 electronically balanced, floating and symmetrical.
DA Conversion: 20-bit 128X oversampled D/A converter.
DC Offset: Less than 10mV.
Filtering: RFI filtered. Effective 0.5-1000MHz.
DIGITAL AUDIO INPUT
Configuration: Stereo per AES/EBU-standard (AES3-1992), 20-bits
resolution, software selection of stereo, mono from left, mono from right,
or mono from sum (as source to use as a mono processor).
Sampling Rate: 32, 44.1 and 48kHz.
Connector: XLR-type, female, EMI-suppressed. Pin 1 chassis ground,
Pins 2 (+) and 3 transformer balanced and floating, 110 ohms impedance.
Status Bits: Input channel status is ignored. Input User bits are
optionally passed through to the output.
Input Reference Level: Variable within the range of -30 to -10dBFS
(VU) in 0.5dB steps.
Filtering: RFI filtered. Effective 0.5-1000MHz.
DIGITAL AUDIO OUTPUT
Configuration: Two-channel per AES/EBU-standard (AES3-1992).
Output Level Control: Peak level is adjustable from -20dBFS to 0
in 0.1dB steps. Controlled by software.
Sampling Rate: Internal free running at 32kHz ±10 PPM, 44.1kHz
±100 PPM, or 48kHz ±10 PPM, selected in software. Can also
be synced to the AES/EBU SYNC input or the AES/EBU DIGITAL input at 32kHz
± 4%, 44.1kHz ± 4%, or 48kHz ± 4%.
Word Length: Selectable 20, 18, or 16 bit. Optional dither can be
added, with level adjusted appropriate to word length. This is first-order
noise-shaped dither. (i.e., white TPDF dither of peak amplitude equal to
the quantizer step size with noise shaping spectral density of 6dB/octave.)
It sounds substantially quieter than white triangular PDF dither but, in
contrast to more extreme noise-shaped dither, it adds only 3dB unweighted
noise by comparison to white PDF dither.
Sync: Internal free running or external per AES11. The "AES/EBU
SYNC Input" is the primary source for external sync. The "AES/EBU
Input" is an alternate source.
Connector: XLR-type, male, EMI-suppressed. Pin 1 chassis ground,
Pins 2 and 3 transformer balanced and floating.
Status/User Bits: The channel status optionally supports the S/PDIF
or AES/EBU formats. The user bits received from the "AES/EBU input"
are optionally passed through to the output. The 192-bit block structure
is used where prea ble "Z" indicates the start of block.
Jitter: Less than 10ns rms.
Filtering: RFI filtered. Effective 0.5-1000MHz.
DIGITAL SYNC INPUT
Configuration: Used for synchronization of the Digital Output signal
to an external reference provided at this input. Labeled "AES/EBU Sync
Input."
Sampling Rate: 32, 44.1 and 48kHz.
Connector: XLR-type, female, EMI-suppressed. Pin 1 chassis ground,
Pins 2 and 3 transformer balanced and floating, 110W impedance.
Filtering: RFI filtered.
POWER
Voltage: 100-132 VAC or 200-264 VAC, switch-selected on the rear
panel, 50-60Hz, 50 VA.
Connector: IEC, EMI-suppressed. Detachable 3-wire power cord supplied.
Grounding: Circuit ground is independent of chassis ground; 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 1.75" x 13.25"/48.3cm
x 4.4cm x 33.7cm, one rack unit high.
Weight: 13 lbs/6kg.
Shipping Weight: 18 lbs/8.2kg.