Studio Technologies 76DA V.4.12 - Manual (Page 18)

Issue 9, May 2014 Model 76DA/77 User Guide
Page 18 Studio Technologies, Inc.
for Surround
The configuration diagrams, located later
in this section, give details on setting each
parameter. An overview of each configu-
rable parameter is provided in the following
paragraphs.
Entering and Exiting the
Configuration Mode
A small button is located on the back of
each Model 77 Control Console, adjacent
to its 9-pin female D-sub connector. On any
connected Model 77 pressing and holding
this button for two seconds places both this
specific unit and the Model 76DA into their
configuration modes. Other connected Mod-
el 77 and Model 71 units will enter a stand-
by mode. When the Model 76DA enters its
configuration mode it will immediately mute
the monitor outputs as a speaker protec-
tion measure. When a Model 77 enters the
configuration mode its array of buttons and
LEDs no longer perform their normal func-
tions, instead they are used to display the
operating parameters and reflect configura-
tion changes as they are made.
As a user aid, a Model 77 that has entered
the configuration mode will have its mute
and solo LEDs (associated with the chan-
nel mute/solo section) light in an alternating
manner. Other connected Model 77 units
will indicate that they have entered the
standby mode by simultaneously flashing
their mute and solo LEDs.
To leave the configuration mode and return
the system to normal operation requires
one last action to be made on the Model 77
unit that’s in its configuration mode; press
and hold its configure the button for two
seconds. Note that configuration changes
are stored in nonvolatile memory only after
the configuration mode has been exited.
Our apologies to those of you who find the
configuration button a pain to use, but it’s
supposed to be that way! Seriously, the top
of the button is slightly recessed from the
back panel, making it harder to accidentally
activate. We didn’t want normal operation to
cease because someone pushed a Model
77 into a “rats nest” of schedules, memos
from management, and empty coffee cups!
But a firm press with the fleshy part of an
index finger should do the trick.
There is no problem frequently “tweak-
ing” the system’s operating parameters
to achieve the desired performance. The
configuration data is stored in nonvolatile
memory, which is rated for thousands of
read and write cycles and a retention time
in tens of years. Note that memory integrat-
ed circuits are located in the Model 76DA
Central Controller as well as the Model 77
and Model 71 Control Consoles. The in-
dividual device address is stored in each
Model 77. The device address and button
configuration parameters are stored in the
Model 71. All other configuration param-
eters are stored in the Model 76DA.
Model 77 Device Address
A unique device address must be assigned
to each Model 77 that is connected to a
Model 76DA. The choices are A1, A2, A3,
or A4, with the default address being A1. As
most installations will find only one Model
77 utilized, its default setting is appropri-
ate. For installations that use a second,
third, or fourth Model 77 each unit must be
configured with a unique device address.
Problems will occur if more than one unit
has the same address! It’s important to
highlight the fact that the device address is
the only setting that must be done on each
individual Model 77 unit. All other settings
can be made on any one of the connected