Studio Technologies 76D 2014 - Manual (Page 9)

Model 76D/77 User Guide Issue 11, May 2014
Studio Technologies, Inc. Page 9
for Surround
functions, talkback or slate activity from
an audio console or other communications
system can control the level of the post-
fader surround and stereo monitor outputs.
Installation
In this section you will be installing the
Model 76D Central Controller in an equip-
ment rack. Connections to the digital audio
inputs and digital monitor outputs will be
made. A dedicated digital audio timing
reference signal can be connected to the
sync input. If desired, 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 connected to the Model 76D. AC mains
power will be connected to the Model 76D.
For advanced applications up to three ad-
ditional Model 77 or Model 71 Control
Console units can be connected to the
Model 76D.
System Components
The main shipping carton contains one
each of the following: Model 76D Central
Controller, Model 77 Control Console,
9-pin D-sub interconnecting cable, and
user guide. Also included in the ship-
ping carton is a North-American-standard
AC mains cord. Your dealer or distributor
should provide an AC mains cord appro-
priate for destinations outside of North
America. Any additional Model 77 or Model
71 Control Consoles will be shipped in
separate cartons.
Mounting the Model 76D
The Model 76D Central Controller requires
one space (1U) in a standard 19-inch
(48.3 cm) equipment rack. Secure the
Model 76D into the equipment rack
using two mounting screws per side. Se-
lect a location that is convenient for making
connections to the audio signals as well
as interfacing with the first (or only) Model
77 Control Console. A cable is supplied to
connect the Model 76D to the Model 77. If
the needs of a specific installation dictate,
an alternate-length interconnecting cable
can be fabricated and used.
Audio Connections
Audio connections are made by way
of nine BNC jacks and one 25-pin D-sub-
miniature connector. All the connectors
are located on the Model 76D’s back
panel. Refer to Figure 2 for a detailed
view of these jacks and the connector.
Audio Inputs
Two surround (5.1) and three stereo digital
audio sources can be connected. All sourc-
es can be monitored using the pre- and
post-fader surround and post-fader stereo
monitor output channels. A one-to-one
relationship is maintained between the
input and output channels, i.e., left input to
left monitor output, right input to right mon-
itor output, center input to center monitor
output, etc. (Of course this won’t be true in
the case where the user has enabled one
or both of the downmix functions.) Stereo
input C is also routed to the stereo input C
direct monitor output.
The audio inputs support digital audio sig-
nals with a sampling rate of up to 192 kHz
and a word length (depth) of up to 24 bits.
It’s best if the connected signal sources
maintain a common sample rate and tim-
ing reference. Having all signals “locked”
together helps to ensure proper handling
by the Model 76D’s all-digital signal control
path.