Studio Technologies 76DA V.4.12 - Manual (Page 9)

Model 76DA/77 User Guide Issue 9, May 2014
Studio Technologies, Inc. Page 9
for Surround
intercom systems, on-air or recording tally
signals, and audio consoles. Two remote-
control inputs provide access to the mute
all and dim functions. By providing access
to these functions, talkback or slate activity
from an audio console or other communi-
cations system can control the level of the
post-fader surround and stereo monitor
outputs.
Installation
In this section you will be installing the
Model 76DA Central Controller in an equip-
ment rack. Connections to the digital audio
inputs, digital monitor outputs, and analog
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 76DA. AC mains power will be con-
nected to the Model 76DA. For advanced
applications up to three additional Model
77 or Model 71 Control Console units can
be connected to the Model 76DA.
System Components
The main shipping carton contains one
each of the following: Model 76DA 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 appropri-
ate for destinations outside of North
America. Any additional Model 77 or
Model 71 Control Consoles will be
shipped in separate cartons.
Mounting the Model 76DA
The Model 76DA Central Controller re-
quires one space (1U) in a standard 19-
inch (48.3 cm) equipment rack. Secure
the Model 76DA 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 76DA 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 two 25-pin female
D-subminiature connector. All the connec-
tors are located on the Model 76DA’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
monitor 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 func-
tions.) 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