Studio Technologies 76 V.1.04 - Manual (Page 14)

Issue 4, September 2008 Model 76/77 User Guide
Page 14 Studio Technologies, Inc.
for Surround
both the Model 76 and all the connected
Model 77 units into the confi guration mode.
The Model 76 will immediately mute the
analog outputs as a protection measure.
In the confi guration mode the Model 77’s
array of buttons and LEDs no longer per-
form their normal functions, instead allow-
ing you to observe and change many of
the operating parameters. The mute and
solo LEDs, associated with the channel
mute/solo mode section, will light alter-
nately to indicate that the confi guration
mode is active.
To leave the confi guration mode and return
the Model 77 units to normal operation
once again press and hold the confi gure
button for two seconds. Note that confi gu-
ration changes are stored in nonvolatile
memory only after the confi guration mode
has been exited.
Our apologies to those of you who fi nd
the confi gure 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
the Model 77 into a “rats nest” of sched-
ules, magazines, or burrito wrappers! But
a fi rm press with the fl eshy part of an index
fi nger should do the trick.
There is no problem frequently “tweak-
ing” the system’s operating parameters
to achieve the desired performance. The
confi guration data is stored in nonvola-
tile memory, which is rated for thousands
of read and write cycles and a retention
time in tens of years. Note that memory
integrated circuits are located in both the
Model 76 Central Controller and the Model
77 Control Consoles. Only the individual
device address is stored in each Model
77. All other confi guration parameters are
stored in the Model 76.
Model 77 Device Address
A unique device address must be assigned
to each Model 77 that is connected to a
Model 76. The choices are A1, A2, A3, or
A4, with the default address being A1. As
most installations will fi nd 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
confi gured 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
Model 77 units.
Stereo Output
In addition to a 6-channel surround monitor
output, a separate 2-channel stereo out-
put is also provided. By default the stereo
output can be enabled by an operator. In
applications where stereo monitor loud-
speakers are not connected to the stereo
output, the stereo output can be disabled.
This can minimize confusion, preventing
an operator from attempting to select the
stereo output.
Digital Input Reference Level
Confi guring the digital input reference level
to match the sources associated with a
specifi c installation is an important step
toward achieving optimal audio perfor-
mance. This ensures that the Model 76’s
digital audio receiver integrated circuits
are confi gured to match the digital input