Studio Technologies 780-03 V.4.15 - Manual (Page 42)

Issue 1, April 2015 Model 780-03/790 User Guide
Page 42 Studio Technologies, Inc.
for Surround
Model 71 Control Console
The Model 71 Control Console provides a
rotary level control, two pushbutton switch-
es, and three LEDs for control and status
display. The rotary level control allows ad-
justment of the post-fader digital and ana-
log monitor output level. Two buttons, along
with associated LEDs, provide access to
the dim and reference level functions. A
status LED lights steadily whenever nor-
mal Model 71 operation is taking place.
Any changes made using the Model 71’s
rotary level control and buttons will be
reflected in the appropriate LEDs and dis-
plays on all the connected Model 790 and
Model 71 units. And, as expected, changes
made using a Model 790 will be reflected
in the Model 71’s LEDs.
In some applications it may be desirable to
disable operation of a Model 71’s dim and
reference buttons. An example could be
where non-technical personnel are allowed
only to use the rotary level control. A con-
figuration parameter, previously described
in the Model 71 Control Console Configu-
ration section of this user guide, allows
button operation to be disabled.
Rotary Level Control
The rotary level control is used to manu-
ally adjust the post-fader digital and analog
monitor output levels. Its operating charac-
teristics are identical to the rotary control in
the Model 790 Control Console, discussed
earlier in this section.
Dim
The dim function allows the post-fader
digital and analog monitor output level to
be reduced by a fixed amount. Its operat-
ing characteristics are identical to those of
the Model 790 Control Console, discussed
earlier in this section.
An indication is provided should the dim
button be pressed when button operation
has been disabled. Its associated LED will
flash briefly but no operating change will
occur. The LED will continue to display the
status of the dim function as selected by
other Model 790 and Model 71 units.
Reference Level
The reference level button sets the post-
fader digital and analog monitor output
level to the preset value. The operating
characteristics are identical to those of the
Model 790 Control Console, discussed
earlier in this section.
An indication is provided should the ref-
erence button be pressed when button
operation has been disabled. The associ-
ated LED will flash briefly but no operating
change will occur. The LED will continue
to display the status of the reference level
function as selected by other Model 790
and Model 71 units.
Technical Notes
Loss of Sync
The Model 780-03 relies on an external
timing reference (sync) source for proper
operation. This can be in the form of an
AES3, word clock, DARS (AES11), bi-level
video, or tri-level video reference signal. In
many cases the sync signal will be con-
nected to the sync input BNC connector
located on the Model 780-03’s back panel.
Alternately, a configuration choice allows
the L/R input of the currently selected
digital input source to also serve as the
system’s timing reference. Whenever a
valid sync signal has been connected to