Studio Technologies 780-03 V.4.15 - Manual (Page 9)

Model 780-03/790 User Guide Issue 1, April 2015
Studio Technologies, Inc. Page 9
for Surround
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 communications
system can control the level of the post-
fader digital and analog monitor outputs.
Installation
In this section you will be installing the
Model 780-03 Central Controller in an
equipment rack. Connections to the sur-
round and stereo audio inputs, digital moni-
tor 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 in-
puts. A location will be selected for the first
Model 790 Control Console and it will be
connected to the Model 780-03. AC mains
power will be connected to the Model 780-
03. For advanced applications up to three
additional Model 790 or Model 71 Control
Console units can be connected to the
Model 780-03.
System Components
The main shipping carton contains one
each of the following: Model 780-03 Cen-
tral Controller, Model 790 Control Console,
9-pin D-subminiature interconnecting cable
(approximately 20 feet (6 meters) in length),
and a 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 Amer-
ica. Any additional Model 790 or Model 71
Control Consoles will be shipped in sepa-
rate cartons.
Mounting the Model 780-03
The Model 780-03 Central Controller
requires one space (1U) in a standard
19-inch (48.3 cm) equipment rack. Secure
the Model 780-03 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
790 Control Console. A cable is supplied
to connect the Model 780-03 to the Model
790. 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
three 25-pin female D-subminiature con-
nectors and one 3-pin female XLR connec-
tor. Audio monitor output connections are
made by way of two 25-pin female D-sub-
miniature connector. The connectors are
located on the Model 780-03’s back panel.
Refer to Figure 2 for a detailed view of
these connectors.
Audio Inputs
Two balanced digital surround (7.1) and
one balanced digital stereo audio source
can be connected. Users will be able to
monitor them, one at a time, using the pre-
and post-fader monitor outputs. 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
of the three downmix functions.)