Studio Technologies 76 V.1.04 - Manual (Page 8)

Issue 4, September 2008 Model 76/77 User Guide
Page 8 Studio Technologies, Inc.
for Surround
an external 12 volt DC source is required
for a third and fourth unit. The intercon-
necting cables use 9-pin D-subminiature
connectors that carry RS-485 data and DC
power. Remote control signals, including
mute all and dim, connect to the Model 76
using a second 9-pin D-sub connector.
For fl exibility, the StudioComm for Sur-
round system is designed to easily inte-
grate with equipment such as production
intercom systems, on-air or recording tally
signals, audio consoles, and fi lm motion-
control electronics. Two remote-control
input functions are provided: mute all and
dim. By providing access to these func-
tions, talkback or slate activity from an
audio console or other communications
system can control the monitor output
level.
While the StudioComm for Surround
system for multi-channel monitoring will
do many wonderful things, it is not de-
signed to selectively route input signals
to the different output channels. An input-
channel-to-output-channel relationship is
maintained. As an example, a signal that
arrives on the center channel of surround
input A will output only on the center chan-
nel of the monitor output. Any rerouting
of the input signals must be done prior to
their connection to the StudioComm for
Surround system. This should not be a
drawback in most facilities, but it’s impor-
tant to highlight this fact.
Installation
In this section you will be installing the
Model 76 Central Controller in an equip-
ment rack. Connections to the digital
audio inputs and analog monitor outputs
will be made. External equipment will be
interfaced to the remote control inputs. A
location will be selected for the fi rst Model
77 Control Console and it will be connect-
ed to the Model 76. AC mains power will
be connected to the Model 76.
For advanced applications up to three ad-
ditional Model 77 Control Console units
can be connected to the Model 76. Please
refer to the Advanced Installation section
of this guide for details.
System Components
The main shipping carton contains one
each of the following: Model 76 Central
Controller, Model 77 Control Console,
20-foot (6.1 m) 9-pin D-sub interconnecting
cable, and user guide. Units destined for
North America also include an AC mains
cord. Your dealer or distributor should
provide an AC mains cord for destinations
outside of North America. Any additional
Model 77 Control Consoles will be shipped
in separate cartons.
Mounting the Model 76
The Model 76 Central Controller requires
one space in a standard 19-inch (48.3 cm)
equipment rack. Select a location that is
convenient for making connections to the
digital and analog audio signals as well as
interfacing with the Model 77 Control Con-
sole. A 20-foot (6.1 m) cable is supplied to
connect the Model 76 to the Model 77. If
the needs of a specifi c installation dictate,
an alternate-length interconnecting cable
can be fabricated and used. Secure the
Model 76 into the equipment rack using
two mounting screws per side.
Audio Connections
Audio signal connections are made by
way of multiple BNC jacks and a 25-pin
D-subminiature connector which are