Studio Technologies 76DBA V.3.00 - Manual (Page 7)

Model 76DBA/77B User Guide Issue 1, November 2010
Studio Technologies, Inc. Page 7
for Surround
Figure 3. Model 77B Control Console Front Panel
Input select
Channel solo
Auxiliary stereo
monitor output
enable
Post-fader surround
digital and analog monitor
outputs
• Dialnorm enable
• Reference level
• Mute all
• Dim
• Rotary level control
Dialnorm and
monitor output
level display
Downmix Display mode
audio program. This dialog normalization
or “dialnorm” value is an integral part of
many broadcast distribution systems, end-
ing up as part of consumer audio playback
systems. Hardware and software within the
Model 76DBA separates the dialnorm ele-
ment that relates to one of the connected
surround audio sources. This dialnorm
level value can be displayed on the Model
77B Control Console, as well as being
used to automatically adjust the post-fader
surround digital and analog monitor output
levels. This provides a unique solution for
the broadcast and post-production world,
allowing a professional environment to ac-
curately simulate an end user’s experience.
Great care was taken in designing the
system’s architecture, ensuring that the
character of the audio input signals is
preserved. All audio processing is per-
formed in 32 bits using a high-speed
field-programmable gate array (FPGA)
integrated circuit.
The Model 76DBA occupies one space
(1U) in a standard 19-inch rack. Digital
audio sources are interfaced with the
Model 76DBA using nine BNC connectors.
A tenth BNC connector is used by the sync
source. Digital and analog monitor output
signal connections are made using two
25-pin D-subminiature connectors. One
9-pin D-subminiature connector is used to
connect the Model 76DBA with up to four
Model 77B or Model 71 Control Consoles.
A second 9-pin “D-sub” connector is used
to interface Dolby E dialnorm data and
remote control signals. AC mains power
is connected directly to the Model 76DBA,
with an acceptable range of 100 to 230
volts, 50/60 Hz.
Additional Details
The Model 77B provides four buttons and
associated LEDs for selecting the input
source to be monitored. The buttons are
designed such that up to six unique input
choices are available. Using the Model