Overview
The 20-bit Antex Model BX-12 is the most advanced and feature-laden
product manufactured by Antex. Designed to meet the demand
for more powerful and flexible digital broadcast systems,
Antex engineers have incorporated the equivalent of four boards
on a single soundcard. The Model BX-12 features 10 balanced
analog outputs and two balanced analog inputs that are controlled
via Antex's on-board digital mixer application. With separate
record and playback subsystems, each with its own dedicated
sample clock, the Broadcaster provides simultaneous recording
and playback functions. This makes possible the production
of spots, phone calls and program feed recording and editing
while playing back a stereo program on-air - all with a single
card on a single PC.
The Broadcaster's high level of integration and features
give OEMs and developers the ability to simplify integration,
increase application functionality and lower the cost of digital
broadcast systems. The card currently supports MPEG and 16-bit
ADPCM compression. 20-bit converters and Antex's multi-layer
board design to prevent electronic interference within the
PC provide CD-quality digital audio for the highest quality
digital broadcast applications.
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Features
- Full-sized PCI-based, multi-channel digital audio adapter
for PC and compatible computers
- 2-in / 10-out balanced analog, stereo digital AES/EBU
inputs via D-sub connector
- Separate recording (production) and playback subsystems
each with a fully-independent sample clock
- 5 stereo or mono devices
- Recording and production of spots, phone calls and feeds
simultaneously with on-air playback with a single PC
- Microphone feed-through circuit
- On-board mixer applications: allows live microphone feed
through, realtime crossfades and fadeouts to be performed
digitally with 32-bit precision
- The Antex mixer application can automate and replace an
external digital mixing console
- On-board header to accept the field-upgradable Antex daughtercard
that breaks out the outputs into AES/EBU digital for simultaneous,
parallel access to all analog and digital outputs
- Optional general purpose opto-isolated 16-bit digital
I/Os, with a serial data stream to allow system integrators
future expansion for controlling keypad switches, user interface
functions, timers and other broadcast installation functions
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Technical Specifications
- 20-bit converters with an SRAM buffer depth of 384k bytes
prevents dropouts in high latency networked environments
- Dynamic Range: 92dB
- THD+N: -86 dB minimum; -90 dB typical
- Optional LTC (longitudinal time code) input
- MPEG Layer I & II
- Dual Independent sample clocks provide separate, simultaneous
record and playback sample rates
- Selectable Sample rates to 50 kHz with 50 Hz resolution,
AES or internal reference.
- Four independent sample rates (Model BX-12e)
- Analog outputs are available on high-density 15- and 30-pin
D-sub connectors
- Three 32-bit floating point DSPs
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Applications
- Digital Broadcast Systems
- Satellite Distribution
- Storecasting
- Digital audio recording and mastering
- Multimedia development
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Software Development Tools
The Antex Broadcaster driver software allows an application
program to provide direct to disc recording and playback of
digital audio using the Broadcaster under Microsoft Windows
95/98/NT/2000 and XP. In Windows the Broadcaster is supported
by the multimedia extensions allowing it to be used with any
Windows Multimedia applications.
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