®
INC.
PACIFIC MICROSONICS
20
Setup & Operation
Model Two HDCD
®
User’s Manual
Rev. C - January 2002
NOTE: HDCD LSB code must be reinserted when producing HDCD Compact Disc or DVD-
Audio release masters if HDCD signal data has been altered in any way during digital
post production processing. See Digital Post Production Processing on page 30.
AD_44.1 Mode
In AD_44.1 Mode, the Model Two performs 44.1 kHz A/D conversion with selectable HDCD
24-bit, 20-bit, or 16-bit output. Different word lengths may be independently fed to
digital outputs 1 and 2 (SETUP/OUTPUT/OUT_1 or OUT_2). Between +3.15 dB and 0 dB of
digital A/D gain adjustment in .05 dB steps is available using AD gain in the Levels Menu
(LEVELS/AD_GAIN). Factory Presets: AD1X-24, AD1X-16, AD1X2416.
DD44-44 Mode
In DD44-44 Mode, the Model Two performs 44.1 kHz digital processing. 24-bit, 20-bit, 16-
bit, or 16-bit HDCD input signals can be converted to 24-bit, 20-bit, or 16-bit HDCD word
lengths, along with HDCD 16-bit amplitude encoding and decoding. Different word lengths
may be independently fed to digital outputs 1 and 2 (SETUP/OUTPUT/OUT_1 or OUT_2).
Between +6 and -25.9 dB (+12 to -19.9 dB if Peak Extend is used) of signal level adjust-
ment is available using DSP gain in the Levels Menu (LEVELS/DSPGAIN). Factory Presets:
DD1X-20, DD1X-16.
AD+DD44 Mode
In AD+DD44 Mode, the Model Two combines AD_44.1 and DD44-44 Modes, allowing their
functions to be cascaded, saving considerable production time. For example, an analog
input signal can be converted to a 24-bit HDCD signal on digital output 2, fed to a 24-bit
processor or work station, returned to digital input 2, (which has an input word length of
24-bits and only functions at 44.1 kHz in AD+DD44 Mode) converted to a 16-bit HDCD
signal on digital output 1, and fed to a 16-bit recorder, all in real time. Digital output 1
level can be adjusted relative to the level of digital output 2 over a range of +6 dB to -9.9
dB (+12 to -3.9 dB if Peak Extend is used) by using output 1 offset in the Levels Menu
(LEVELS/OUT1OFS). Factory Preset: AD+DD1X.
AD_88.2 Mode
In AD_88.2 Mode, the Model Two performs 88.2 kHz A/D conversion with selectable HDCD
24-bit, 20-bit, or 16-bit output. Selectable, two-wire, standard speed, or single wire,
double speed AES signal formats are used for the 88.2 kHz stereo signal, and may be
independently set on inputs and outputs (SETUP/INPUT or OUTPUT/FORMAT/1_WIRE or
2_WIRE). When two wire is selected, digital input and output 1 is channel 1, and digital
input and output 2 is channel 2. When single wire is selected, digital input 1 and outputs
1 and 2 carry stereo signals. Digital A/D gain between 0 and +3.15 dB, in .05 dB steps, in
the Levels Menu provides fine A/D level trim (LEVELS/AD_GAIN). Factory Preset: AD2X-24.
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