Pacific Microsonics HDCD Model Two User Manual page 22

Setup & Operation
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Model Two HDCD User's Manual
AD176.4 Mode
In AD176.4 Mode, the Model Two performs 176.4 kHz A/D conversion with selectable HDCD
24-bit, 20-bit, or 16-bit output. A two-wire, double speed AES signal format is used for the
176.4 kHz stereo signal. Digital output 1 is channel 1, and digital output 2 is channel 2. 0
to +3.15 dB of digital A/D gain adjustment in .05 dB steps is available using AD gain in
the Levels Menu (LEVELS/AD_GAIN). Factory Preset: AD4X-24.
DD176.4 Mode
In DD176.4 Mode, the Model One performs 176.4 kHz, 24-bit, 20-bit and 16-bit word
length conversion, level adjustment using DSP gain, and reinsertion of HDCD LSB code.
Reinsertion of HDCD LSB code is necessary when producing HDCD DVD-Audio release
masters if 176.4 kHz HDCD signals have their data altered during digital post produc-
tion processing. A two-wire, double speed AES signal format is used for the 176.4 kHz
stereo signal. Digital input and output 1 are channel 1, and digital input and output 2 are
channel 2. Between +6 and -25.9 dB of signal level adjustment is available using DSP gain
in the Levels Menu (LEVELS/DSPGAIN). Factory Preset: DD4X-4X.
DD176-88 Mode
In DD176-88 Mode, the Model Two performs 176.4 kHz to 88.2 kHz sampling frequency
conversion using HDCD decimation filtering. The 88.2 kHz output word length is selectable
between HDCD 24-bit, 20-bit, or 16-bit. A two-wire, double speed AES signal format is
used for the 176.4 kHz stereo input signal. Digital input 1 is channel 1, and digital input
2 is channel 2. Selectable, two-wire, standard speed, or single wire, double speed AES
signal formats are used for the 88.2 kHz stereo output signal (SETUP/OUTPUT/FORMAT/
1_WIRE or 2_WIRE). When two wire is selected, digital output 1 is channel 1, and digital
output 2 is channel 2. When single wire is selected, digital outputs 1 and 2 are stereo.
Between +6 and -25.9 dB of signal level adjustment is available using DSP gain in the
Levels Menu (LEVELS/DSPGAIN). Factory Preset: DD4X-2X.
DD176-44 Mode
In DD176-44 Mode, the Model Two performs 176 kHz to 44.1 kHz sampling frequency
conversion using HDCD adaptive decimation filtering. Fixed decimation filtering can also
be used for special cases, such as synthesized sources. The 44.1 kHz output word length is
selectable HDCD 24, 20, or 16-bit. A two-wire, double speed AES signal format is used for
the 176.4 kHz stereo input signal. Digital input 1 is channel 1, and digital input 2 is
channel 2. In DD176-44 Mode, only one word length can be selected for the 44.1 kHz
output, which appears at both digital output 1 and digital output 2. Between +6 and -25.9
dB (+12 to -19.9 dB if Peak Extend is used) of signal level adjustment is available using
DSP gain in the Levels Menu (LEVELS/DSPGAIN). Factory Presets: DD4X-24, DD4X-16.
P A C I F I C M I C R O S O N I C S I N C .
Rev. C - January 2002
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