Studio Technologies 76 V.1.10 - Manual (Page 8)

Issue 7, August 2012 Model 76/77 User Guide
Page 8 Studio Technologies, Inc.
for Surround
response of a loudspeaker associated with
an inexpensive television or clock radio.
Up to four Model 77 Control Consoles
can be connected to a Model 76 Central
Controller. The Model 76 can provide power
for the first two Model 77 units while an
external 12 volt DC source is required for
a third and fourth unit. The interconnecting
cables use 9-pin D-subminiature connec-
tors 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 flexibility, the StudioComm for Surround
system is designed to easily integrate with
equipment such as production intercom
systems, on-air or recording tally signals,
audio consoles, and film motion-control
electronics. Two remote-control input func-
tions are provided: mute all and dim. By pro-
viding access to these functions, 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 designed
to selectively route input signals to the dif-
ferent 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 out-
put only on the center channel of the moni-
tor 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 important 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 first 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
additional 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 specific installation dictate,
an alternate-length interconnecting cable