Studio Technologies 761 - Manual (Page 9)

Model 761/771 User Guide Issue 1, March 2008
Studio Technologies, Inc. Page 9
for Surround
Installation
In this section you will be installing the
Model 761 Central Controller in an equip-
ment rack. Connections to the digital audio
inputs and analog monitor outputs will be
made. A location will be selected for the
Model 771 Control Console and it will be
connected to the Model 761. If applicable,
a source of Dolby E metadata may be con-
nected. In addition, external equipment will
be interfaced to the remote control inputs.
AC mains power will be connected to the
Model 761.
System Components
The shipping carton contains one each
of the following: Model 761 Central Con-
troller, Model 771 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 American.
Mounting the Model 761
The Model 761 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 to the Model 771 Control Console. A
20-foot (6.1 m) cable is supplied to con-
nect the Model 761 to the Model 771. If the
needs of a specifi c installation dictate, an
alternate-length interconnecting cable can
be fabricated and used. Secure the Model
761 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
located on the Model 761’s back panel.
Refer to Figure 2 for a detailed view of the
back panel. The BNC jacks will be used
for the digital audio signals. A cable as-
sembly with a 25-pin D-sub plug (male) on
one end and the desired connectors on the
other end will be used for connecting to the
analog monitor outputs.
Digital Audio Inputs
The nine female BNC connectors on the
Model 761’s back panel are used to in-
terface with digital audio signal sources.
Please refer to Figure 4 for details on the
supported inputs and the exact connectors
to be used.
Note that the input source titles in Figure 4
refer to the button selections on the Model
771 Control Console. It includes support
for three input sources each for both SD
(standard-defi nition) and HD (high-defi ni-
tion) programming. For SD the primary
source is either 5.1 surround or 2-channel
stereo while for HD the primary source
is intended to be 5.1 surround. In both
SD and HD the SAP (secondary audio
program) and INTL (international) inputs
are monaural. Of course, technically, all
the digital audio inputs on the Model 761
provide the same excellent audio quality.
The titles refer only to the intended signal
sources.
Each of the available digital audio inputs
is intended for connection to an unbal-
anced digital audio source that is compat-
ible with the AES3id-2001 standard. In
broadcast environments these signals may
also be referred to as following the SMPTE