Studio Technologies 76DA V.4.02 - Manual (Page 18)

Issue 4, March 2013 Model 76DA/77 User Guide
Page 18 Studio Technologies, Inc.
for Surround
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 D-sub connector. On any con-
nected Model 77 pressing and holding
this button for two seconds places both
this specific unit and the Model 76DA into
their configuration modes. Other con-
nected Model 77 and Model 71 units will
enter a standby mode. When the Model
76DA enters its configuration mode it will
immediately mute the monitor outputs as
a speaker protection measure. When a
Model 77 enters the configuration mode
its array of buttons and LEDs no longer
perform their normal functions, instead
they are used to display the operating
parameters and reflect configuration
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 alternat-
ing manner. Other connected Model 77
units will indicate that they have entered
the standby mode by simultaneously flash-
ing 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 configure 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 acciden-
tally activate. We didn’t want normal opera-
tion 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 inte-
grated circuits are located in the Model
76DA Central Controller as well as the
Model 77 and Model 71 Control Consoles.
However, only the individual device ad-
dress is stored in each Model 77 and
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 be-
ing A1. As most installations will find only
one Model 77 utilized, its default setting
is appropriate. 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 im-
portant 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 Model 77 units. Be sure
that any selected address does not conflict
with addresses to be assigned to Model 71
units.