A B O U T T H E P C I E - 4 2 4 S Y S T E M
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input to receive SMPTE time code. Any active channel,
digital or analog, can be chosen as a SMPTE time code
output.
Level Meters
The front panel of the 2408mk3 I/O displays several banks of
status LEDs. On the left are three banks of eight LEDs (A, B
and C) that show audio signal on the 2408mk3’s three
ADAT/TDIF digital I/O buses. On the right are eight vertical,
five-segment LEDs that show input level from the eight
analog inputs measured from -40 dB to 0 dB. A similar bank
of dedicated five-segment LEDs is provided for the analog
outputs. These LEDs also provide status information, such as
the system clock sample rate and other settings.
Stand-alone Format Conversion
Finally, several additional LEDs, along with accompanying
set/select buttons, allow you to access the 2408mk3 I/O’s
stand-alone format conversion features. With these controls,
you can bounce any I/O format to any other format without
a computer.
Headphone output
The 2408mk3 front panel includes a quarter-inch stereo
headphone output jack and volume knob. The headphone
output matches the main stereo outs, which have their own
volume knob.
THE 24I/O INTERFACE
24 analog 24-bit/96 kHz inputs and outputs
The 24I/O is a single-space, rack mountable chassis with
gold-plated analog audio connectors on its rear panel and
level meters on the front. The rear panel has 24 gold-plated,
ba4dB TRS analog inputs and outputs with 24-bit
A/D converters. All inputs and outputs can be accessed
simultaneously. Internally, the 24I/O has a 24-bit data path to
and from the computer so that all audio data is carried
to/from the computer in 24 bits.
Converters
All analog-to-digital and digital-to-analog inputs on the
24I/O are equipped with 24-bit, 128x oversampling,
extremely high-quality, latest-generation converters.
Word clock in and out
BNC Word clock connector can be programmed via software
for either input or output for synchronization with standard
word clock devices.
Level Meters
The front panel of the 24I/O displays 48 level meters,
arranged in three banks of 8 channels. For each channel,
there is a five-segment meter that measures from -42 dB to 0
dB.
The clock section in the middle of the front panel indicates
the current sample rate.
THE HD192 INTERFACE
High definition audio recording
The HD192 provides the very best A/D and D/A conversion
available. It can operate at any standard sample rate from
44.1 kHz to 192 kHz.
12 analog inputs and 12 outputs
The HD192 I/O is a two-space, rack mountable chassis with
XLR audio connectors on its rear panel and level meters on
the front. The rear panel has four banks of I/O in the
following formats:
■
One bank of 12 XLR inputs
■
One bank of 12 XLR outputs
■
One pair of AES/EBU stereo digital I/O connectors
All analog inputs and outputs can be accessed simulta-
neously.
AES/EBU digital I/O
The HD192 rear panel includes an AES/EBU stereo digital
input and output. Both of these connectors are capable of
handling 24-bit digital audio at sample rates up to 96 kHz.
The AES/EBU input and output each has its own
independent sample rate converter for real-time conversion
between any two sample rates between 40 and 100 kHz.
System word clock in and out
BNC ‘System’ Word clock connectors (in and out) are
provided for synchronizing the HD192’s main system clock
with other standard word clock devices.
