Studio Technologies 76DA V.3.01 - Manual (Page 34)

Issue 2, April 2011 Model 76DA/77 User Guide
Page 34 Studio Technologies, Inc.
for Surround
Operation
Now that you’ve installed and configured
the system, you’re ready to go. You should
find operation very easy. However, taking
time to study this section of the guide may
prove valuable.
Upon power up the system will return to
the last operating condition, including the
selected source, downmix modes, etc. As
a precaution, however, the post-fader sur-
round and stereo digital and analog moni-
tor output levels will always return to their
minimum value. The rotary level control
or the reference level button must then be
used to return the system to the desired
monitor output level.
Model 76DA Central
Controller
The Model 76DA’s front panel contains two
LEDs. The control console status LED will
light whenever the Model 76DA is commu-
nicating with the one or more connected
Model 77 or Model 71 units. A flashing
control console status LED will indicate
that the DC power output supporting the
control consoles is in a short-circuit or
over-current condition. The control console
status LED will not light when a Model 77
is in the configuration mode or when the
Model 77 is going through its power-up
sequence.
The sync status LED will light whenever
a valid timing reference signal is being
received by the Model 76DA. A flashing
sync status LED indicates that a valid sync
signal is not being received.
Control Consoles
StudioComm for Surround operation is
controlled using the up to four Model 77
or Model 71 Control Consoles that have
been connected. Two system functions can
also be controlled by means of the remote
control inputs.
Model 77 Control Console
To make things easy to describe, the Mod-
el 77’s operator functions are divided into
six main groups: input source selection,
downmix, monitor output general functions,
channel mute/solo, display and display
mode, and remote control inputs.
Any change made to any one Model 77
unit will be reflected in the LEDs and dis-
plays on all the connected units. Note that
all control consoles function simultane-
ously—there is no priority of one unit over
the others.
Input Source Selection
To select an input source press one of the
five input source buttons. The correspond-
ing LED will light to indicate that the input
has been selected. Typically, only one
source will be selected for monitoring at
any one time. However, input stereo C can
be selected by itself, or mixed (summed)
with one of the other four inputs. To accom-
plish this is easy: simply press and hold
input stereo C then press the button asso-
ciated with the other desired input source.
The two corresponding LEDs will light.
Alternately, press and hold the first desired
input (other than input stereo C) and then
press the input stereo C button.
Downmix
Two downmix functions allow users to per-
form “real-world” audio format compatibility
checks. One function allows a surround
(5.1) signal to be “folded down” (mixed) to
stereo. The other allows a stereo signal to