The Model Two HDCD processor, manufactured first by
Pacific Microsonics and then subsequently by Euphonix
has the ability to make the highest-quality digital
recordings in any PCM release format from 44.1 to
192kHz. The Model Two contains multiple state-of-the-art
functions in one unit:
Unmatched A/D Conversion
- Resolution and accuracy are unmatched
- HDCD 24-bit, 20-bit, and 16-bit
- 192, 176.4, 96, 88.2, 48, and 44.1 kHz
- Distortion products are below -120 dBfs
- Uses Pacific Microsonics' patented HDCD Dynamic
Decimation Filtering
Unmatched D/A Conversion
- Resolution and accuracy are unmatched
- HDCD 24-bit, 20-bit, and 16-bit
- 192, 176.4, 96, 88.2, 48, and 44.1 kHz
- Distortion products are below -120 dBfs
- Super-resolution 44.1-to-88.2-kHz and
48-to-96-kHz D/A modes
Unmatched Digital Processing
- Unmatched accuracy and transparency
- Converts 24-bit to 20-bit or 16-bit
- Converts 16-bit HDCD to 20-bit or 24-bit
- Converts 192/176.4-kHz signals to 96/88.2 kHz
and 48/44.1 kHz
- Converts 44.1/48-kHz signals to 88.2/96 kHz and
176.4/192 kHz
- Adjusts gain from -25 to +6 dB
Future-Proof Investment
- Produces unmatched CD releases
- Produces unmatched DVD-Video and DVD-Audio
192-kHz, 176.4-kHz, 96-kHz, 88.2-kHz, 48-kHz, and
44.1-kHz, 24-bit, 20-bit, and 16-bit releases
- Designed for surround sound; multiple Model Two
units can run from one precision clock
- Produces the finest 24-bit archive masters
Each Model Two is hand assembled and rigorously
tested by a skilled manufacturing team using the
highest-quality components available:
- Eight Motorola 56009 DSPs providing 400 millions
of instructions per second (MIPS) in processing
power
- Discrete, multibit A/D and D/A converters
designed by Pacific Microsonics
- Ultra-low jitter; precision A/D and D/A
reclocking circuitry
- Pacific Microsonics-designed 2-MHz bandwidth
discrete operational amplifiers used throughout
analog circuitry
- High-isolation discrete shunt power regulation
used throughout
- All analog and digital circuitry shielded and
electrically isolated
- Balanced, direct-coupled high common mode
rejection ratio (CMRR) analog inputs and balanced
+24 dBu direct-coupled analog outputs
- Isolated, independent linear power supplies
- Vibration-isolated, thermally controlled cooling
fan
- Copper-plated chassis
Setup and operation of the Model Two are controlled
by a backlit graphic display, rotary optical encoder,
and software-configured switches. Multiple operating
configurations can be stored as user-labeled presets,
allowing instant setup. Signal-level metering is
provided by a sophisticated multifunction, four-color
LED bar graph. Model Two software updates can be
downloaded easily using a built-in RS232 serial data
port.
Model Two HDCD Processor
Technical Specifications
Analog Inputs
Connectors: XLR-3-31
Polarity: Pin 2 or 3 high (software selected)
Sensitivity: +12 dBu to +24 dBu full scale
Impedance: ≤ 13 k Ω balanced
CMRR: > 80 dB DC to 1 kHz, > 60 dB at 20 kHz
Analog Outputs
Connectors: XLR-3-32
Polarity: Pin 2 or 3 high (software selected)
Level: +18 or +24 dBu full scale set using analog
attenuation
All other levels are set using digital attenuation in
0.188-dB steps at 44.1 and 48 kHz (displayed level
selection is shown in .1-dB steps for a possible
indication error of ±0.094 dB). At 88.2 kHz and above,
digital attenuation is in exact 0.1-dB steps.
Impedance: 20 Ω balanced
Digital Inputs
Signal format: AES/EBU 16-bit to 24-bit word lengths;
44.1 kHz, 48 kHz, 24-bit, single wire, 88.2 kHz, 96 kHz,
single wire or two wire, 176.4 kHz and 192 kHz , two
wire
Connectors: XLR-3-31
Level: RS-422
Impedance: 110 Ω balanced
Digital Outputs
Signal format: AES/EBU 16-bit, 20-bit, and 24-bit word
lengths; 44.1-kHz, 48-kHz, 88.2-kHz, 96-kHz, 176.4-kHz,
and 192-kHz sampling rates
Connectors: XLR-3-32
Level: RS-422
Impedance: 110 Ω balanced
Output 1 and 2 word lengths may be independently set at
44.1 and 48 kHz.
Digital Reference Input
Signal format: AES/EBU 16-bit to 24-bit word lengths;
44.1-kHz, 48-kHz, 88.2-kHz, and 96-kHz sampling rates
Connector: XLR-3-31
Level: RS-422
Impedance: 110 Ω balanced
Word Clock Input/Output (I/O)
Signal format: 44.1-kHz, 48-kHz, 88.2-kHz, and 96-kHz
square wave
Connector: BNC
Input level: TTL
Impedance: 75 Ω
The Model Two has isolated high-impedance bridging word
clock inputs and requires an external 75 Ω termination.
This allows multiple units to be "daisy chained" for
synchronous operation with the last unit in the chain
terminated by 75 Ω. The 75 Ω word clock output is AC
coupled to prevent ground loops and can be connected to
most equipment with CMOS TTL-compatible 75 Ω word clock
inputs.
Serial Data I/O
Signal format: RS-232
Connector: D-Sub 9-pin Data Terminal Equipment (used for
downloading system software)
User Setup and Operating Interface
Backlit, dot-matrix graphic display, rotary optical
encoder, and software-configured switches allow
software-based configuration of all setup and operating
parameters. Multiple operating configurations can be
stored as user-labeled presets, allowing instant setup.
Signal Level Meters
Two-channel, 66-dB range, four-color LED bar graph.
"Peak" and "Over" indication selectable for duration and
sensitivity, reference level variable from -6 dB to -21
dB in 1-dB steps, reference level set mode (provides .2
dB per segment resolution), calibrated digital signal
word length display mode, 6-dB HDCD 16-bit "Peak Extend"
level indication, display reset, and variable
brightness. Peak bar or simultaneous average bar with
peak dot display modes.
HDCD Signal Processing
Eight Motorola 56009 DSPs and one Pacific Microsonics
PMD-100 HDCD decoder ASIC control A/D conversion,
sampling rate conversion, word length conversion,
digital gain adjustment, HDCD encoding and decoding, and
D/A conversion.
A/D and D/A Conversion Reclocking
Jitter rejection knee: A/D < 1 Hz (jitter reduction at
100 Hz > 80 dB), D/A < 2.5 Hz
AC Power Requirements
100/120/220/240 volts +5% to -15%, 50/60 Hz, 200 watts
Dimensions
Processor unit: 5.25" high by 19" wide by 19.5" deep
(133mm by 483mm by 495mm)
Enclosure is 17" wide (432mm) behind front panel.
Power supply: 2.5" high by 14" wide by 12.25" deep (64mm
by 356mm by 311mm)
Weight
Processor unit: 35 lbs (16 kg)
Power supply: 20 lbs (9 kg)
Custom ATA road case: 41 lbs (19 kg) |
