Revision C • 1/04
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1 General Information
digital
Studio Module
This optional module has the monitoring and
talkback controls for two separate studios or voice
booths, plus talkback audio and control inputs
for a producer/call screener position and for an
external position.
The Producer and External audio inputs are
line level. The Mic Preamp module may be used
as needed for these inputs. A Producer Talkback /
IFB Panel (PRE99-1188) is also available. It pro-
vides a mic and preamp for the Producer along
with Talk buttons for thirteen locations.
The Studio module has two parallel logic con-
nectors for the Studio 1 and 2 dim, mute, and Stu-
dio Warning Lamp interface controls.
The Studio module also has monitor and talk-
back selector controls, and monitor and talkback
level controls. All of the controls operate indepen-
dently for each studio.
Output Modules
There are three Output modules. The Output 1
module has the digital-to-analog converters and
mix matrices for creating mix-minus foldbacks to
support up to six Telco/Codec modules. It also con-
tains individually mixed outputs for Telco moni-
toring and recording. Two monaural mix-minus
outputs for each Telco/Codec module, one with
talkback (IFB) and one with a clean feed, are on
this module.
Digital and analog outputs are provided for the
mix-minus and recorder feed outputs. For digital
outputs, sample rates of 48 kHz and 44.1 kHz
are supported. The mix-minus analog outputs are
fixed at +4 dBu. This module features output
sample rate selectors for digital outputs and gain
trim controls for the analog Telco record mix out-
put and IFB level.
The Output 2 and Output 3 modules contain
the AES digital output drivers, digital-to-analog
converters, and analog line amplifiers for the Pro-
gram, Utility, and Send outputs. For digital out-
puts, sample rates of 48 kHz and 44.1 kHz are
supported. These modules feature output sample
rate selectors for the Program auxiliary outputs
and the Utility and Send outputs, as well as gain
trim controls for the Program, Utility, and Send
analog outputs.
DSP Cards
The number of standard DSP (Digital Signal
Processor) cards installed is frame-size dependent
(BMX
d-8 has one DSP Card, BMXd-14 has two,
and so on up to the BMX
d-38 with five cards).
DSP cards plug into the motherboard behind
the input modules, hidden below the meter panel
in normal use. Each card has a “heartbeat” LED
to indicate operation. An optional External Input
DSP (99-1355-1) adds an external AES-3 refer-
ence input for the first DSP Card position.
Net Card
This optional card allows the BMX
digital to di-
rectly interface to a VistaMax Audio Management
System. It plugs into the motherboard behind the
Output modules, hidden below the meter panel in
normal use. There are eight VistaMax inputs and
outputs on the card for connecting intercom, ex-
ternal monitors and other in-room equipment that
does not need to have local module control.
POWER SUPPLY
The separate rack-mount power supply (99-
1205) su48 VDC and a voltage monitor
signal to the console. One supply comes standard.
An optional second 99-1205 supply and a +48
VDC Coupler (99-1203) can be installed for re-
dundant supply operation. Each power supply has
its own AC input, On/Off switch and LED power
good indicator. Each power supply is fully regu-
lated and protected against excessive current by
internal fuses and electronic safeguards.
