Studio Technologies 76DBA V.3.00 - Manual (Page 6)

Issue 1, November 2010 Model 76DBA/77B User Guide
Page 6 Studio Technologies, Inc.
for Surround
Figure 1. Model 76DBA Central Controller Front Panel
Figure 2. Model 76DBA Central Controller Back Panel
Sync
status
LED
Control console
status LED
Sync
Input
connection
Digital
monitor
output
connections
To/from
Models 77B &
71 Control
Consoles
AC mains
input connection
RS-485 and
remote control
inputs
Surround Input B
connections
Surround Input A
connections
Stereo Input A and
Stereo Input B
connections
Metadata
status
LED
Stereo
Input C
connection
(SRC) capability, allowing a wide range of
digital audio sources to be monitored. Up
to 340 milliseconds of input delay can be
selected to compensate for processing
delays in an associated video path. A num-
ber of different signals can serve as the
Model 76DBA’s digital audio timing refer-
ence. For synchronization with a master
timing reference a dedicated source of
word clock, DARS (AES11), bi-level video,
or tri-level video can be connected. Alter-
nately, the L/R connection of the actively
selected surround or stereo input source
can serve as the timing reference.
A range of digital and analog surround
(5.1) and stereo monitor outputs are pro-
vided. The post-fader surround digital
and analog monitor outputs are intended
for connection to monitor loudspeaker
systems. The pre-fader surround digital
monitor output can be used with metering
systems that require signals that aren’t im-
pacted by level control or other monitoring
functions. The auxiliary stereo digital and
analog outputs are provided for special
broadcast applications where independent
outputs with separate on/off control are
desired. The stereo input C direct digital
monitor output allows an installation to
directly access the SRC capabilities.
For installation flexibility the digital monitor
outputs can be configured for compatibility
with equipment that requires AES3
(“balanced”) or AES3id (“unbalanced”)
digital audio signals. When selected for
AES3 compatibility the output impedance
is 110 ohms with a signal level of 5 volts
peak-to-peak (Vpp). For AES3id operation
the impedance is 75 ohms and the level
is 1 Vpp.
A source of Dolby E metadata can be con-
nected to the Model 76DBA Central Con-
troller. This RS-485/RS-422 115.2 Kbit/s
serial data signal carries numerous data
elements, including one that represents
the average dialog level of an associated
Analog
monitor outputs